Search the Community
Showing results for tags 'review'.
-
Overview (Disclaimer: The following is for techies only that like to dig a bit deeper. And if you're not interested in energy-efficient servers then probably this is just a waste of time ) EDIT: Half a year after this poorly designed SBC has been released just one of the many design flaws has been fixed: Micro USB for DC-IN has been replaced by the barrel jack that was present on the pre-production batches. If you were unfortunate to get a Micro USB equipped M3 please have a look here how to fix this. Apart from that check the Banana forums what to expect regarding software/support first since this is your only source) SinoVoip sent me a review sample of the recently shipped so called "Banana Pi M3" yesterday. It's a SBC sharing name and form factor of older "Banana Pi" models but is of course completely incompatible to them due to a different SoC, an A83T (octa-core Cortex-A7 combined with a PowerVR SGX544 GPU). For detailed and up-to-date informations please always refer to the linux-sunxi wiki. This new model distinguishes itself from the Banana Pi M2 with twice as much CPU cores and DRAM (LPDDR3), 8 GB eMMC onboard and BT4.0. And compared to the "M1" (the original Banana Pi) it features also 802.11 b/g/n Wi-Fi. Unlike the M2 the M3 is advertised as being SATA capable. But that's not true, it's just an onboard GL830 USB-to-SATA bridge responsible for horribly slow disk access. Unfortunately the GL830 and both externally available USB ports are behind an internal USB hub therefore all ports have to share bandwidth this way and use just one single USB connection to the SoC. Since my use cases for ARM boards are rather limited you won't find a single word about GPIO stuff (should work if pin mappings are defined correctly), GPU performance, BT, Wi-Fi or Android. Simply because I don't care Getting Started: The board arrived without additional peripherals (no PSU) therefore you need an USB cable using a Micro-USB connector to power the board. Both DC-IN and USB-OTG feature an Micro-USB connector which is bad news since pre-production samples had a real DC-In connector (4.0mm/1.7mm barrel plug, centre positive like the M2). I suffered from several sudden shutdowns under slight load until I realized that I used a crappy cable. Many (most?) USB cables lead to voltage drops and when the board demands more power it gets in an undervoltage situation and the PMU shuts off. Same will happen to you unless you can verify that you've a good cable. I did not succeed querying the M3's powermanagement unit (PMU) regarding available voltage (/sys/devices/platform/axp81x_board/axp81x-supplyer.47/power_supply/ac/voltage_now shows always 0). This was a lot easier with the older Banana Pi M1: Here you can watch my cable being responsible for voltage drops under high load (I accidentally used this again with the M3). To avoid the crappy Micro-USB connector (limited to 1.8A maximum by specs and tiny contacts) you can desolder it and solder a cable or a barrel plug -- the PCB is already prepared for the latter. Or ask SinoVoip if they can fix this mistake with the next batch of PCBs. On the bottom side of the PCB there are also solder pads for a Li-Ion battery. It has to be confirmed whether the AXP813 PMU can also be fed with 5V through the Li-Ion connector since this is the preferred way to fix the faulty power design other SinoVoip products show. One final word regarding power: It seems currently something's wrong with power initialisation in the early boot stages (u-boot). With a connected bus-powered USB disk the board won't start or immediately shut down when the disk is connected within the first 10 seconds. I didn't verify when exactly because if you've a look at SinoVoip's commit log it seems they began to fix many obvious bugs just right now after they already started shipping the board (we've seen that with the M2 also). First Showstoppers: Since the board came with an unpopulated eMMC (why the heck?) I had to try out the available OS images from the banana-pi.org download site. Unlike everyone else on this planet they don't provide MD5/SHA1 checksums to be able to check integrity of downloads and even if you tell them that they've uploaded corrupted images they don't care. From 4 OS images 3 are corrupted (according to unzip) and all failed soon after boot with kernel panics. I tried the Android image to verify FEL mode works. But since Android is of zero use for me, I decided to build an own OS image from an Ubuntu distro running on the Orange Pi where I had the SD-card inserted. Since details are boring just as a reference. From then on I used this Ubuntu image and exchanged only the freshly built stuff from SinoVoip's BSP Github repo (3.4.39 kernel, modules, bootloader and also simple things like hardware initialisation since kernel/u-boot they prefer does NOT support script.bin) First Impressions: Heat (dissipation): The A83T needs a heatsink otherwise you won't be able to benefit from its performance. Allwinner's 3.4.39 kernel provides 'budget cooling' using 2 techniques: thermal throttling and shutting down CPU cores. You can define this 'thermal configuration' in sysconfig.fex and have to take care that you understand what you're doing since if throttling doesn't help your CPU cores will be deactivated and you have to can't bring them back online manually the usual way since Allwinner's kernel doesn't allow so: echo 1 >/sys/devices/system/cpu/cpuX/online Therefore it's better to stay with the thermal defaults to allow throttling and improve heat dissipation instead. I used a $0.5 heatsink that performs ok. Without heatsink when running CPU intensive jobs throttling limited clockspeed to 1.2 GHz but with the heatsink I was able to run most of the times at ~1.6Ghz under full load. With heatsink and an annoying fan I managed to let the SoC run constantly at 1.8GHz and achieved a 7-zip score close to 6000 and finished "sysbench --test=cpu --cpu-max-prime=20000 run --num-threads=8" in less than 53 seconds. This is an example for wrong throttling values (too high) so that the kernel driver does not limit clockspeeds but starts to drop CPU cores instead: CPU performance: Since the H3 (used on the more recent Orange Pis) and the A83T seem to use much of the same kernel sources (especially the 'thermal stuff') I did a few short tests. When running with identical clockspeed and the same amount of cores they perform identical (that means they're slower than older Cortex-A7 SoCs like eg. the A20 when running at identical clockspeed -- a bit strange). Obviously the difference between H3 and A83T is the process. Both already made in 28nm but the A83T as 'tablet SoC' in the more energy efficient HPC process allowing less voltage and higher clockspeeds. According to sysconfig.fex the SoC should be able to clock above 2.1 GHz but since exceeding 1.6 Ghz already needs a fan this is pretty useless on a SBC (might be different inside a tablet where the back cover could be used as a large heatsink). Network throughput: I used my usual set of iperf testings and tried GBit Ethernet performance (with and without network tunables it remains the same -- reason below): BPi-M3 --> Client: [ 4] 0.0-10.0 sec 671 MBytes 563 Mbits/sec [ 4] 0.0-10.0 sec 673 MBytes 564 Mbits/sec [ 4] 0.0-10.0 sec 870 MBytes 729 Mbits/sec [ 4] 0.0-10.0 sec 672 MBytes 564 Mbits/sec [ 4] 0.0-10.0 sec 675 MBytes 566 Mbits/sec Client --> BPi-M3: [ 4] 0.0-10.0 sec 714 MBytes 599 Mbits/sec [ 5] 0.0-10.0 sec 876 MBytes 734 Mbits/sec [ 4] 0.0-10.0 sec 598 MBytes 501 Mbits/sec [ 5] 0.0-10.0 sec 690 MBytes 578 Mbits/sec [ 4] 0.0-10.0 sec 604 MBytes 506 Mbits/sec When I used longer test periods (-t 120) then the "Client --> BPi-M3" performance increased up to the theoretical limit: 940 Mbits/s. Then a second iperf thread jumped in, both utilising a single CPU core fully. And that's the problem: Networking is CPU bound, a single client-server connection will not exceed 500-600 Mbits/sec as it was the case when I started with A20 based boards 2 years ago. Since all we have now with the A83T is an outdated 3.4.39 kernel and since I/O bandwidth on the M3 is so low, I stopped here since it's way too boring to try to improve network throughput and also useless (disk access is so slow that it simply doesn't matter when Ethernet is limited to half of the theoretical GBit Ethernet speed... at least for me ) Accessing disks: Since there's a SATA connector on the board I gave it a try. Important: the SATA-power connector uses the same polarity as older Banana Pis and Orange Pis (keep that in mind since combined SATA data/power cables from LinkSprite and Cubietech that share exactly the same connector use inverted polarity!). I started with the Samsung EVO I always use for tests (but due to the old 3.4 kernel using ext4 instead of btrfs) and was shocked: 13.5/23 MB/s is the worst result I ever measured. I then realised that I limited maximum cpufreq to 480 MHz and tried with 1800 MHz again. A bit better but far away from acceptable: GL830 USB-to-SATA performance: 480 MHz: kB reclen write rewrite read reread 4096000 4 13529 13466 22393 22516 4096000 1024 13588 13411 22717 26115 1.8 GHz: 4096000 4 15090 15082 30968 30316 4096000 1024 15174 15131 30858 29441 I disconnected the SSD from the 'SATA port' and put it in an enclosure with a JMicron JMS567 USB-to-SATA bridge and measured again: Now sequential transfer speeds @ 1800 MHz exceeded 35/34 MB/s. The GL830 is responsible for low throughput -- especially writes are slow as hell. I made then a RAID-1 through mdadm consisting of an external 3TB HDD (good news: the GL830 can deal with partitions larger than 2 TB) and the SSD. First test with the HDD connected to the M3's GL830 bridge (GL) and the SSD connected to the JMS567 (JM). Then I disconnected the HDD from the GL830 and put it in another external enclosure with an ASMedia 1053 (ASM). Obviously SinoVoip's decision to use an internal USB hub and only one host port of the SoC leads in both situations to limited (shared) bandwidth. But in case the internal USB-to-SATA bridge is involved performance is even worse: GL/JM: kB reclen write rewrite read reread 4096000 4 17800 17140 14382 16807 4096000 1024 17741 17258 14493 14368 JM/ASM: 4096000 4 19307 18458 22855 26241 4096000 1024 19231 18518 21995 22362 If SinoVoip would've saved the GL830 USB-to-SATA bridge and wired both SoC's host ports to the 2 type-A USB ports directly without the internal hub in between overall performance would be twice as good. And obviously the M3's 'SATA port' is the worst choice to connect a disk to. Any dirt-cheap external USB enclosure will perform better. SD-card and eMMC: Just a quick check with the usual iozone settings running @ 1.8 GHz: kB reclen write rewrite read reread eMMC: 4096000 4 26572 27014 59187 59239 4096000 1024 25875 26614 56587 56667 SD-card: 4096000 4 20483 20855 22473 22892 4096000 1024 20526 19948 22285 22660 LOL, eMMC twice as fast as 'SATA'. The performance numbers of the SD-card (SanDisk "Extreme Pro") are irrelevant since I can not provide performance numbers from a known fast reference implementation. But since I might be able to provide this the next few days, I decided to give it a try. On older Allwinner SoCs there's a hard limitation regarding SDIO/SD-card speed. Maybe this applies here too. EDIT: Yes, it's a board/SoC limitation. When reading/writing the SD-card on a MacBook Pro I achieve ~80 MB/s. It seems SDIO on A83T is limited to ~20MB/s Other issues: If you want to try out the M3 you'll have to stay on the bleeding edge. Don't expect that any of the available OS images are close to useable. They just recently started to fix a lot of essential bugs in code and hardware initialisation. If you want to test the M3 be prepared to compile the BSP daily and exchange the bootloader/kernel/initialisation stuff on your SD-card/eMMC Currently average load is always 1 or above. When we started over 2 years ago with Cubieboards (and an outdated kernel 3.4.x) there was a similar issue. Maybe it's related. I just opened a Github issue Mainline kernel support in very early stage. Don't count on this that soon (situation with Banana Pi M2 was a bit different. All the OS images from SinoVoip based on kernel 3.3 weren't useable but the community provided working distros backed by the work of the linux-sunxi community and existing mainline kernel support for the M2's A31s) Always keep in mind that hardware without appropriate software is somewhat useless. SinoVoip has a long history of providing essential parts of software way too late or not at all (still applies to the M2 -- before you buy any SinoVoip product better have a look into their forums to get the idea which level of support you can expect: zero). Even worse: For the M2 and its A31s SoC there exists mainline kernel support (everything developed by the community while the vendor held back necessary informations). This does not apply to the A83T used on the M3. At the moment you're somewhat lost since you've to rely on the manufacturer's OS images (all of them currently being broken) Conclusion: Still no idea what to do with such a device. Integer performance is great when you use a heatsink and even greater with an annoying fan. But where's the use case? If I would use the M3 with Android then everything that's relevant for performance does not depend on CPU (but instead CedarX for HW accelerated video decoding and GPU for 2D/3D acceleration -- BTW: the A83T is said to contain only a single core SGX544MP1 but the fex file's contents let me believe it's a faster MP2 instead). Due to limited I/O and network bandwidth the integer performance is also irrelevant for nearly all kinds of server tasks. If it's just about 'SBC stuff' why wasting so much money? Triggering GPIO pins works also with cheap H3 based boards like Orange Pi PC or Orange Pi One that also have 4 times more I/O bandwidth compared to the M3 (due to 4 available USB ports instead of one). And if I would really need a performant ARM SoC then I would buy such a thing and not an outdated Cortex-A7 design. I still have no idea what the M3 is made for. Except of selling something under the "Banana" brand to clueless people. Don't know. For my use cases the Banana Pi M1 outperforms the M3 easily -- both regarding price and performance (sufficient CPU power, 3 x USB and real SATA not 'worst USB-to-SATA implementation ever'). As usual: YMMV Maybe the worst design decision (next to choosing the crappy Micro-USB connector for DC-IN) on the M3 is the 'SATA port'. If they would've saved both internal USB hub and GL830 and instead use the two available USB host ports then achievable I/O bandwidth would be way higher. Now both USB ports and the 'SATA port' have to share the bandwidth of a single USB 2.0 connection. Almost as bad as with the Raspberry Pis. But most importantly: Check software und support situation first and don't rely on 'hardware features'. Remember: SinoVoip shipped the M2 with OS images where not a single GPIO pin was defined and Ethernet worked only with 100Mb/s since they 'forgot' to define GMAC pins. They fixed that months later but still not for every OS image (the Android image they provide is corrupted since months but they don't care even if users complain several times). Visit their forums first to get an idea what to expect. It's important! Armbian support: Not to be expected soon. It's worthless when having to rely on Allwinner's old 3.4.39 kernel. I combined loboris' H3 Debian image with kernel/bootloader stuff for the A83T and it worked as expected (even my RPi-Monitor setup matched almost perfectly). Unless the linux-sunxi community improves mainline support for the A83T this situation won't change. But maybe someone interested in M3 (definitely not me) teaches SinoVoip how to escape from u-boot/kernel without support for script.bin in the meantime. Would be a first step.
-
Hi all. Here my review of the Orange Pi 5 Plus with Armbian Jammy. I show tips for better desktop experience, show how to build your own images, how to run games, and tons of info about the board. Here's the video : For those who rather read, here's my gathered data : https://docs.lane-fu.com/s/5IxGlf4gn Greetings, NicoD
-
1
-
Hi all. I made a new video about Armbian on the Khadas VIM3. Both standard Armbian and Monka his Widevine and Gaming image. Here it is :
-
Hi all. Here my review video about the Mixtile Blade 3. An RK3588 ARM SBC with a special connector to make it possible to connect multiple of these boards in a cluster. But it can also be used well as desktop or server device. It has all the bells and whistle's an RK3588 can have like dual 2.5GbE, m-PCIe, NVMe, HDMI-out + 2 x DP on USB-C and HMDI-in, ... Here is my video : Greetings, NicoD
-
My gathered info : RK3588(S) comparison -------------------- RK3588(S) 8nm LP process 4 x A55 @ 1.8Ghz + 4 x A76 @ 2.4Ghz (Not the same for all boards, between 2.2Ghz and 2.4Ghz) Mali-G610 MP4 "Odin" 6TOPs NPU Up to 32GB memory theoretically (haven't seen any 32GB yet) RK3588 RK3588S PCIE3.0 2x2 Lanes PCIe3.0 N/A PCIe2.0/SATA3.0/USB3.0 MUX 3x1 Lane PCIE2.0 2x1 Lane PCIE2.0 3x SATA 3.0 2x SATA 3.0 1x USB3.0 (refer USB section) 1x USB3.0 (refer USB section) Board SoC Memory eMMC SD-Reader NVMe/PCIe/SATA Network USB2 USB3 USB-C (dp) HDMI-out HDMI-in DP Active cooling Powered with 1. Khadas Edge 2 Pro Rockchip RK3588S 16 GB LPDDR4X 2112 MHz 64 GB xxx xxx xxx 1 x 1 x 1 x DP 1 x xxx xxx xxx (Case not out yet) USB-C PD 2. NanoPi R6S Rockchip RK3588S 8 GB LPDDR4X 2133 MHz 32 GB yes xxx 2 x 2.5GbE + 1GbE 1 x 1 x xxx 1 x xxx xxx Metal case USB-C PD 3. Radxa Rock5B Rockchip RK3588 16 GB LPDDR4X 2112 MHz Module yes 2 x M.2 NVMe 2.5GbE 2 x 2 x xxx 2 x 1 x micro-HDMI xxx XU4 heatsink no sufficient USB-C PD (Issue with PD, I'm using 5V 4A PSU) 4. Mekotronics R58 Mini Rockchip RK3588 16 GB LPDDR4X 64 GB xxx SATA ribbon 1GbE 2 x 1 x 1 x (no DP) 2 x 1 x full size 1 x Big heatsink sufficient *** 12V barrel jack *** Case could also be used to cool with a thermal pad 5. Mekotronics R58X-4G Rockchip RK3588 8 GB LPDDR4X 64 GB xxx SATA/NVMe/mini-PCIe 1GbE 2 x 1 x 1 x DP 1 x 1 x full size 1 x Big heatsink sufficient *** 12V barrel jack 6. Orange Pi 5 Rockchip RK3588S 4/8 GB LPDDR4(x) xxx yes NVMe 1GbE 1 x 2 x 1 x DP 1 x xxx xxx No USB-C 5V Other specs Khadas Edge 2 Pro also has 3 x CSI + 2 x DSI, and can have an I/O board for SD-card and uart Radxa Rock5B has 1 x CSI + 1 x DSI OPi5 has 2 x DSI + 3 x Camera port Benchmarks ---------- Board | OS | Kernel | Clockspeeds | 7z b all cores | 7z b core small core | 7z b big core | NicoD Blender | Supertuxkart | SBC-Bench Radxa Rock 5B Armbian Jammy cinnamon 5.10.110 1.8Ghz A55/2.4Ghz A76 15996 1533 (core 0) 2651 (core 7) 3m25s 65fps (panfork) http://ix.io/4jOb Radxa Rock 5B Radxa Bullseye xfce4 5.10.66-27 1.8Ghz A55/2.4Ghz A76 16138 1522 (core 0) 2649 (core 4/7) 4m35s V2.83.5 xxx Khadas Edge2 Ubuntu 22.04 Gnome 5.10.66 1.8Ghz A55/2.35Ghz* A76 16901 1766 (core 0) 2930 (core 7) 3m25s 110fps (wayland) http://ix.io/4e8w ****SBC-Bench broken big cores at 408Mhz NanoPi R6S Ubuntu 22.04 Gnome Headless 5.10.110 1.8Ghz A55/2.3Ghz * A76 16385 1449 (core 0) 2493 (core 7) 3m27s 110fps (wayland) http://ix.io/4gSl Mekotronics R58 Debian Bullseye wayland 5.10.110 1.8Ghz A53/2.2Ghz A76 16803 1777 (core 0) 2879 (core 1) 4m35s 110fps (wayland) http://ix.io/4j40 Mekotronics R58 Ubuntu 20.04 x11 5.10.66 1.8Ghz A53/2.2Ghz A76 16477 1765 (core 0) 2897 (core 1) 5m53s V2.82 4fps (llvmpipe) Mekotronics R58X-G4 Armbian Jammy Gnome 5.10.110 1.8Ghz A53/2.4Ghz A76 16421 1767 (core 0) 2852 (core 1) 3m28s 75fps (panfork) SBC-bench broken Pros+++ ------- Khadas Edge2 Pro Small and USB-C PD powered, so great for my trips but needs a metal case for that. Having the extra USB-C is great. It is either a 2nd fast access to the SoC, and can be used for 2nd HDMI display. OOWOW is great to install new software, no need for RKDevTool. The Khadas software is pretty good. Khadas has a great team that's active on their forum. NanoPi R6S Metal case makes it awesome. It is limited, but for what I wanted it's doing the job better than expected(fast NAS and even watching video). USB-C PD powered, so if I don't find a case for Edge2 I can also use the R6S on my trips. SD-Reader is great for booting and installing software. Mekotronics R58 mini Full sized ports. For home use it's good to have a device that's not tiny. Great to have the display ports on back and side and USB on the front. Case is nice, but not used for cooling. Great for digital signage with 2x HDMI + 1 x DP. Mekotronics R58X-4G mini-PCIe, NVMe and SATA. Full sized ports. USB-C with DP. Nice case, can be used to cool the board with a thermal pad but not needed. Rock5B Armbian support. Has dual M.2 sockets. SD-card reader and eMMC socket. Full sized HDMI-out ports. 2.5GbE. Cons--- ------- Khadas Edge2 Pro No metal case yet(March). Missing SD-card, IO board can add that but then doesn't fit in the case. Seems designed for use in a small kiosk/digital signage, so all small special connectors for additional devices like displays and camera's. NanoPi R6S Designed for networking and so missing a lot of other features(NVMe, PCIe, extra USB-C with DP, multiple USB3 ports...). Mekotronics R58 mini Not the best I/O. No sd-reader what makes the use of RKDevTool needed. Expensive. Wouldn't be as good for me if I didn't know great Armbian devs(MonkaBlyat). Mekotronics R58X-4G No sd-reader what makes the use of RKDevTool needed. Expensive. Wouldn't be as good for me if I didn't know great Armbian devs(MonkaBlyat). Rock5B Software not ready for my daily needs, seems the worst supported board. USB-C PD has issue's. No good cooling sollution comes with the board. My opinion on available software -------------------------------- 1. Khadas Edge2 Ubuntu 22.04 works great with panfork. You can also use the blob GPU driver if you start with the Gnome image. Almost everything works as it should. 2. Mekotronics R58(X-4G) Armbian Jammy Gnome works great with panfork. The Mekotronics images aren't perfect. Works well for desktop/video/gaming. 3. NanoPi R6S Ubuntu 22.04 gnome works well, but panfork doesn't work with it. It's very stable, did my desktop tasks as a champ. But I'm missing gaming on it with x11. 4. Radxa Rock5B Armbian Jammy Gnome is buggy as hell. Only Armbian runs ok on it. The Debian image from Radxa is a mess, Android is unusable. DTB file seems badly hacked together. My favorite ranking for now --------------------------- 1. Mekotronics R58X-4G It has it all. Good cooling, nice it's not tiny, NVMe and SATA and mini-PCIe. 1 less full sized HDMI vs R58 but USB-C DP works too. Armbian thanks to MonkaBlyat brings this on top. 2. NanoPi R6S Limited but works well for what I wanted from it. The case is a big plus. Panfork not working. But the Ubuntu 22.04 Gnome image is great for desktop tasks. Stable, great video playback. Performs well as NAS too. Love that it has an SD-reader. I do not need dual 2.5GbE, so could have been better having NVMe instead of 2nd 2.5GbE port. 3. Khadas Edge 2 Missing of a metal case brings this down, waiting for the case to be released. The software from Khadas is the best of all. No SD-card is also a big minor. Best board for travel laptop. 4. Mekotronics R58X Works well. But has a lot less I/O than R58X-4G. Then again has 2 x full sized HDMI-out vs 1 x on R58X-4G. 5. Radxa Rock5B Bit dissapointed by the software. It does have all the bells and whistles I want. But it isn't ready for daily use yet. Armbian is the only ok-working image for it. And that is a lot more buggy than all the others. ***Don't have the OPi5***
-
Hi all. Here my review of the Mekotronics R58-Mini and R58X-4G. These are my favorite RK3588 devices. Easiest to work with on a desk. Been my main-desktop for the last months. I've been using MonkaBlyat his Armbian images. It is stable, fun to work with, has GPU drivers and VPU. But it is using the dirty rockchip kernel. So once armbian can be build for these devices, and mainline has matured these should be the best RK3588 devices for me at home. For on the road I've got the Kadas Edge2Pro. Here's my video. Mekotronics download page : https://www.mekotronics.com/h-msgBoard.html Armbian from MonkaBlyat for R58-Mini : https://monka.systemonachip.net/r58-mini/Armbian_23.05.0-trunk_r58-mini_jammy_legacy_5.10.110.AFM.img.xz Armbian from MonkaBlyat for R58X (4G/Pro) : https://monka.systemonachip.net/r58x/Armbian_23.05.0-trunk_r58x_jammy_legacy_5.10.110.AFM.img.xz RKDevTool and SPI boot loader for Armbian : https://drive.google.com/file/d/1Gg9So9nuVax_AC82UQJOq1mHBea3sQ4q/view?usp=share_link Here all my gathered info :
-
Hi all. I've just finished making my review video about the Khadas Edge2. No Armbian on it(yet). It is an awesome board, and I'm very happy to have it. I'm still waiting on my Rock5B to arrive, so this helped me overcome this period. But it does have its limits. For some goals it is perfect, some others not so much. Here my video. Greetings, NicoD