ASRock Rack C2750D4I Review: A Storage Motherboard with Management
by Ian Cutress on April 29, 2014 9:00 AM EST- Posted in
- Motherboards
- Storage
- Atom
- ASRock
- Silvermont
- Enterprise
- server
- Avoton
System Benchmarks
USB Backup
For this benchmark, we run CrystalDiskMark to determine the ideal sequential read and write speeds for the USB port using our 240 GB OCZ Vertex3 SSD with a SATA 6 Gbps to USB 3.0 converter. Then we transfer a set size of files from the SSD to the USB drive using DiskBench, which monitors the time taken to transfer. The files transferred are a 1.52 GB set of 2867 files across 320 folders – 95% of these files are small typical website files, and the rest (90% of the size) are the videos used in the WinRAR test. In an update to pre-Z87 testing, we also run MaxCPU to load up one of the threads during the test which improves general performance up to 15% by causing all the internal pathways to run at full speed.
USB effectiveness is often limited by how quickly a system can turn on all the pathways for the required data, as well as the underlying chipset implementation. Avoton is not going to win any records today for USB speed, and the lack of a USB 3.0 port is an oversight.
DPC Latency
Deferred Procedure Call latency is a way in which Windows handles interrupt servicing. In order to wait for a processor to acknowledge the request, the system will queue all interrupt requests by priority. Critical interrupts will be handled as soon as possible, whereas lesser priority requests, such as audio, will be further down the line. So if the audio device requires data, it will have to wait until the request is processed before the buffer is filled. If the device drivers of higher priority components in a system are poorly implemented, this can cause delays in request scheduling and process time, resulting in an empty audio buffer – this leads to characteristic audible pauses, pops and clicks. Having a bigger buffer and correctly implemented system drivers obviously helps in this regard. The DPC latency checker measures how much time is processing DPCs from driver invocation – the lower the value will result in better audio transfer at smaller buffer sizes. Results are measured in microseconds and taken as the peak latency while cycling through a series of short HD videos - less than 500 microseconds usually gets the green light, but the lower the better.
While the system is not a digital audio workstation target, as our DPC test is quick and painless the results are included for completeness. The system actually does rather well, right in the middle of our Z77 testing.
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Marquis - Tuesday, April 29, 2014 - link
Nevermind, reading comprehension FTW. The other two are mentioned later....bombshelter - Tuesday, April 29, 2014 - link
Your comment about the reason for using the PLX switch is wrong. First, the PEX8608 is an 8-lane switch and they are using it in a x4 (from CPU) to 4 x1s (to PCIe end-points) topology. The Avoton CPU actually has a total of 16 PCIe lanes, but can only bifurcate to 4 controllers. So the real reason they are using the PLX switch is to be able to have more than 4 PCIe end-points connected to the CPU. There will be no performance degradation or sharing of bandwidth due to the presence of the PLX switch since there is an equal number of lanes going into it from the CPU as as there are end-points connected on the downstream side.Ian Cutress - Tuesday, April 29, 2014 - link
Aha, yes my interpretation of the chipset diagram was a little off. Going to update the review.chang3d - Tuesday, April 29, 2014 - link
Supermicro has two similar board with a few differences of SO-DIMM, USB 3, 4 NICs, and 6 sata headers. It's also cheaper. I think the features of this board is much better than this ASRock board.http://www.newegg.com/Product/Product.aspx?Item=N8...
ddriver - Tuesday, April 29, 2014 - link
Is it just me or was this review an extremely bad match to that product? What about NAS performance, which undoubtedly will be one of the major selling points? Instead we get gaming on a product as far from gaming as it gets. And content creation?Ian Cutress - Tuesday, April 29, 2014 - link
According to users on several forums, this board has been the focus of many different types of build. I've done a brief analysis here of usability and interface, but Ganesh is our storage guru and has all the equipment for storage related tests, so I'd rather leave that in his court for a follow-up review rather than fumble through them myself.ddriver - Wednesday, April 30, 2014 - link
No offense, but you have reviewed a rake as a back scratcher :)With such massive storage capacity, dual gigabit onboard, up to 64 GB of ECC ram - computational performance is irrelevant, this product is all about throughput. While it may be viewed as somewhat beneficial to get concrete numbers, yet after all the numbers only confirm this product ain't neither about gaming nor about content creation, so if anything the review is useful at proving its uselessness, which makes it technically useful - which is quite a nice paradox ;)
LastQuark - Monday, May 5, 2014 - link
It's not you. This is perfect to me for what this board is intended for - virtualization, NAS, home web server, backup, even good enough for a Plex or XMBC server. The review made it seem like it is for HTPC and gaming which it is not.DuckieHo - Tuesday, April 29, 2014 - link
Drop the AST2300 for management.Drop BMC/SMB.
Drop IPMB.
Drop TPM.
Drop COM port.
Reduce fan ports (6 PWM to 4 PWM).
Drop a SATA controller (12 ports to 8 or 10).
Increase the size of the heatsink and/or add a fan.
Drop the price in half for a consumer version please!
Rick83 - Tuesday, April 29, 2014 - link
There's a quad-core version of the same board at 3/4 the price. That should be enough for most home users. It's also a 14W part, so has less cooling needs.