Sandy Bridge-E and X79 – The ASUS P9X79 PRO Review
by Ian Cutress on November 14, 2011 3:01 AM EST- Posted in
- Motherboards
- Asus
- X79
USB Speed
For this benchmark, we run CrystalDiskMark to determine the ideal sequential read and write speeds for the USB port using our 64GB Patriot SuperSpeed USB 3.0 drive. Then we transfer a set size of files from the SSD to the USB drive, and monitor 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 Sorenson Squeeze test.
Unfortunately, we ran into an issue with our USB 3.0 stick after the USB 2.0 tests. For some reason it is no longer being detected properly. When we get a replacement, the graphs shall follow.
SATA Testing
We also use CrystalDiskMark for SATA port testing. The operating system is installed on the Micron RealSSD C300, which is rated at 355 MB/s read and 215 MB/s write, and the sequential test is run at the 5 x 1000 MB level. This test probes the efficiency of the data delivery system between the chipset and the drive, or in the case of additional SATA ports provided by a third party controller, the efficiency between the controller, the chipset and the drive.
Overall, the PCH does well in SATA sequential speeds compared to previous platforms.
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 - under 500 microseconds usually gets the green light, but the lower the better.
As with the faster processor, we are expecting better DPC Latency as long as the system is engineered quickly. Our max result here was 116 microseconds, however this was a blip - for most of the time, the board would hover around 30 microseconds, which is an excellent result.
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ASUSTechMKT - Wednesday, November 16, 2011 - link
No problem i will look into it and let you know.bradcollins - Wednesday, November 16, 2011 - link
I've bought the Asus P9X79 Deluxe board now and it works perfectly. I can force the multiplier up to the 33x max of the cpu but no matter what settings I try, I can not get the 1.25x multiplier to work, the board does not post after setting it to 1.25 or 1.66. Even with the multiplier set to 20x. I updated the bios to the new version on your site and it hasn't made a difference.Can you get the right person to email me at otama@ihug.co.nz? Maybe an update needs to be made to support Xeons at 1.25x or 1.66x base clock?
Other than that, the board is brilliant :)
ASUSTechMKT - Saturday, November 26, 2011 - link
This is not a UEFI limitation or bug the Xeon CPUs do not support strap changes.
msroadkill612 - Tuesday, November 15, 2011 - link
am i missing something - why would an enthusiast give up 1/3 of the silicon for crap intel graphics - wouldnt they go an I7 & discrete gpuSB just doesnt make sense to me - the mainstream market it targets can live w/ a slower cpu but must have decent graphics. Ignorance aside, they want a lot more for a lot less.
when this hits the shelves in quantity - llano mobos & apuS will be mature, cheap & better - my pick anyday.
jecs - Tuesday, November 15, 2011 - link
I upgraded to SB 2600k/ASUS MOBO/Quadro from day one this year and I am not ready to upgrade again maybe until next year. But as I use this machine for 3D modeling/rendering almost exclusively I am interested in a Xeon class workstation as my next machine. With this SB-E platform I wonder if this is a new class of entry Xeon workstation. But what are the advantages and disadvantages? I mean isn't it overlapping with single socket Xeon workstations? Fortunately I can wait until next year to compare side by side what I will get from each. I can think on ECC memory on a Xeon, but what else?SSD catching on a workstation machine will be solved with at least an 128 SSD for the system and important applications, so I see no real problem there. USB3 could be a problem next year as more devices may be available. So I can see some confusion in what really is this platform target if the price in the same as a Xeon workstation.
Please Anand I would like to see a system to system comparison in the future.
RegGam - Tuesday, November 15, 2011 - link
"Please Anand I would like to see a system to system comparison in the future."Yes! Spec reviews and pictures are nice and all, but real system to system comparisons for different workloads would be hella more useful. And, when you do so, please enable the max feature set that one system is capable of.
For example, enabling the use of the differentiating features like RAM cache during your benchmarks would give readers a good idea of how ASUS' system outperforms (or not) Gigabyte's board. Also, soup it up with ASUS SSD cache and overclock.
abeeftec - Friday, November 18, 2011 - link
"The XMP profile was easy enough to enable with the XMP mode. For more performance, I pushed the board on to the 2400 MHz strap, which booted at auto values of 10-11-10 2T, and was completely stable. Moving towards the 2666 MHz strap caused failed boots. The nearest strap while on the 1.25x ratio was only at 2333 MHz, suggesting that 2400 MHz on the 1.00x strap is a safe memory overclock. "What? 1600Mhz Memory overclocked to 2400Mhz?
Also, I have a Gigabyte Assassin board and the Strap appears to coincide with the Bclk and PCIe. Not memory!
So any upping the gear ratio over 1.00x causes Boot failure.
Does anyone know if the K series is the cause of this. What I mean is, Does the 3930K strap the Bclk/PCIe and the X series Straps the Bclk/ Memory? Not having purchased the 3960X causes a bit of confusion because this area on my board is all Bclk/PCIe related.
Bclk/PCie Clock Control - Manual
Host Clock Frequency - 100.00Mhz
Processor Base Clock (Gear Ratio)- 1.00x
Bclk/PCie Clock Evaluation-100.00Mhz
Changing the Processor Base clock(Gear Ratio) to 1.25x Changes the Bclk/PCIe Clock Evaluation to- 125.00Mhz which causes a 3930K CPU to change to a Frequency of 4.0Ghz from 3.2Ghz with a Multiplier of 32.
My confusion is that Anand said that one touch OC overclocks this way. And that he was able to boot using the 1.25x Gear Ratio and that it has to do with Memory! Well you can clearly see by my board layout that it doesnt have anything to do with Memory.
ASUSTechMKT - Saturday, November 26, 2011 - link
CPU Strap adjustment ( BCLK ) does affect memory dividers. While you have a GB board for more information check out our OC guide which details information on how the strap affect dram scaling and the dividers that are present.
CPU has 4 straps: 100, 125, 167, 250: 1:1, 1:1.25, 1:1.67, 1:2.5 respectively
When you select 125MHz BCLK with 125 strap, 125mhz is given to cpu and internally it gives it’s own PCIE/DMI Controller 125 / 1.25 = 100MHz.
When you select 129MHz BCLK with 125 strap, 129mhz is given to cpu and internally it gives it’s own PCIE/DMI Controller 129 / 1.25 = 103.2MHz.
When you select 122MHz BCLK with 125 strap, 122mhz is given to cpu and internally it gives it’s own PCIE/DMI Controller 122 / 1.25 = 97.6MHz.
In regards to the memory divider if you look at the memory dividers applied ( once the board has reposted with the new strap you will see your dividers are different.
In regards to the K part it works exactly the same way.
markgerazzi - Saturday, November 19, 2011 - link
I'm having a hard time deciding between this and the GA X79 UD5The machine I'm having will be running the 3930k processor, with 32gigs of ram for audio production.
Strongpoints:
Asus:
-Better soundcard apparently, which may not matter in the long run
-Better fan control
-More USB 3.0
Gigabyte:
-Great OC button right on the mobo for when I wan't to switch things off before booting up
-3D bios
Other than those things everytthing looks to be the same...
Any pointers?
Thanks!
ASUSTechMKT - Saturday, November 26, 2011 - link
We offer the TPU switch ( which offers an actual higher default quick OC option ) this can be executed directly on the board, in the UEFI or within windows so flexibility is superior for whenever you feel you want to execute this OC.How is the 3D UEFI superior? Their range of adjustments are considerbly reduced compared to our UEFI and in regards to recovery options like our USB Bios Flash back they do not offer anything. If you really take a look at the small features and big features I feel our baords offer superior value plus I do n ot see GB providing feedback. I welcome any questions you may have.
Additionally keep in mind that in the first year of ownership our warranty does offer APS service ( advanced replacement ) meaning if you did have an RMA we would provide a board before you sent in your faulty board.