We need PCI-E 3.0 working on X79 chipset NVIDIA!
  1 / 10    
I have four GTX 680's on X79 and the 2.0 speed is hampering my 4-way SLI and multi-display Surround setup. I've tested this versus PCI-E 2.0 and 3.0 is much better at this demanding scenario.

I've tried the registry fix to force PCI-E 3.0 but in Surround mode that prevents Windows 7 from booting. So either I am waiting for new drivers to fix this issue properly or am stuck on the shipping drivers that allows PCI-E 3.0 by default as it should be.

X79 is fully PCI-E 3.0, please fix this NVIDIA X79 will be around for a long time and will also be working with Ivy Bridge-E for years!
I have four GTX 680's on X79 and the 2.0 speed is hampering my 4-way SLI and multi-display Surround setup. I've tested this versus PCI-E 2.0 and 3.0 is much better at this demanding scenario.



I've tried the registry fix to force PCI-E 3.0 but in Surround mode that prevents Windows 7 from booting. So either I am waiting for new drivers to fix this issue properly or am stuck on the shipping drivers that allows PCI-E 3.0 by default as it should be.



X79 is fully PCI-E 3.0, please fix this NVIDIA X79 will be around for a long time and will also be working with Ivy Bridge-E for years!

#1
Posted 04/04/2012 05:25 PM   
X79 is still natively PCI-E 2.0 running at 8 GT/s on some motherboards. We are in the process of validating some x79 motherboards to allow our Geforce GTX 680 GPUs to run at 8 GT/s speeds. Ivy Bridge will be Intel's first native PCI-E 3.0 chipset.

http://www.intel.com/content/dam/doc/datasheet/core-i7-lga-2011-datasheet-vol-1.pdf
X79 is still natively PCI-E 2.0 running at 8 GT/s on some motherboards. We are in the process of validating some x79 motherboards to allow our Geforce GTX 680 GPUs to run at 8 GT/s speeds. Ivy Bridge will be Intel's first native PCI-E 3.0 chipset.



http://www.intel.com/content/dam/doc/datasheet/core-i7-lga-2011-datasheet-vol-1.pdf

Please send me a PM if I fail to keep up on replying in any specific thread or leave a driver feedback: Driver Feedback

#2
Posted 04/04/2012 06:04 PM   
[quote name='ManuelG' date='04 April 2012 - 01:04 PM' timestamp='1333562678' post='1391992']
X79 is still natively PCI-E 2.0 running at 8 GT/s on some motherboards. We are in the process of validating some x79 motherboards to allow our Geforce GTX 680 GPUs to run at 8 GT/s speeds. Ivy Bridge will be Intel's first native PCI-E 3.0 chipset.

http://www.intel.com/content/dam/doc/datasheet/core-i7-lga-2011-datasheet-vol-1.pdf
[/quote]


Thanks for the response Manuel! That data-sheet is old and shows PCI-E 2.0 because there was no PCI-E 3.0 video cards in existence to test and certify PCI-E 3.0 on X79 at that time. Now that there are video cards to test, Intel states all of their X79 motherboards are PCI-E 3.0 as you can see here:

http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dx79si.html

Your launch drivers worked at PCI-E 3.0 and so does AMD's 7970 on X79, so hopefully there is some serious effort on nVidia's part to get PCI-E 3.0 working again. X79 is suppose to be the premier high-end platform for 4-way SLI so hopefully I can get my four GTX 680's up to full speed, and the PCI-E 3.0 speed boost DOES matter for those of us in 4-way SLI where the slots get reduced down to 8x.

Could you also make sure in your X79 testing to "Certify" the Asus Rampage IV Extreme motherboard as it is one of the most popular X79 boards out there. Thanks!
[quote name='ManuelG' date='04 April 2012 - 01:04 PM' timestamp='1333562678' post='1391992']

X79 is still natively PCI-E 2.0 running at 8 GT/s on some motherboards. We are in the process of validating some x79 motherboards to allow our Geforce GTX 680 GPUs to run at 8 GT/s speeds. Ivy Bridge will be Intel's first native PCI-E 3.0 chipset.



http://www.intel.com/content/dam/doc/datasheet/core-i7-lga-2011-datasheet-vol-1.pdf







Thanks for the response Manuel! That data-sheet is old and shows PCI-E 2.0 because there was no PCI-E 3.0 video cards in existence to test and certify PCI-E 3.0 on X79 at that time. Now that there are video cards to test, Intel states all of their X79 motherboards are PCI-E 3.0 as you can see here:



http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dx79si.html



Your launch drivers worked at PCI-E 3.0 and so does AMD's 7970 on X79, so hopefully there is some serious effort on nVidia's part to get PCI-E 3.0 working again. X79 is suppose to be the premier high-end platform for 4-way SLI so hopefully I can get my four GTX 680's up to full speed, and the PCI-E 3.0 speed boost DOES matter for those of us in 4-way SLI where the slots get reduced down to 8x.



Could you also make sure in your X79 testing to "Certify" the Asus Rampage IV Extreme motherboard as it is one of the most popular X79 boards out there. Thanks!

#3
Posted 04/04/2012 06:39 PM   
[quote name='Callsign_Vega' date='04 April 2012 - 11:39 AM' timestamp='1333564741' post='1392005']
Thanks for the response Manuel! That data-sheet is old and shows PCI-E 2.0 because there was no PCI-E 3.0 video cards in existence to test and certify PCI-E 3.0 on X79 at that time. Now that there are video cards to test, Intel states all of their X79 motherboards are PCI-E 3.0 as you can see here:

http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dx79si.html

Your launch drivers worked at PCI-E 3.0 and so does AMD's 7970 on X79, so hopefully there is some serious effort on nVidia's part to get PCI-E 3.0 working again. X79 is suppose to be the premier high-end platform for 4-way SLI so hopefully I can get my four GTX 680's up to full speed, and the PCI-E 3.0 speed boost DOES matter for those of us in 4-way SLI where the slots get reduced down to 8x.

Could you also make sure in your X79 testing to "Certify" the Asus Rampage IV Extreme motherboard as it is one of the most popular X79 boards out there. Thanks!
[/quote]

I'll check if the Asus Rampage IV Extreme motherboard is being certified.
[quote name='Callsign_Vega' date='04 April 2012 - 11:39 AM' timestamp='1333564741' post='1392005']

Thanks for the response Manuel! That data-sheet is old and shows PCI-E 2.0 because there was no PCI-E 3.0 video cards in existence to test and certify PCI-E 3.0 on X79 at that time. Now that there are video cards to test, Intel states all of their X79 motherboards are PCI-E 3.0 as you can see here:



http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dx79si.html



Your launch drivers worked at PCI-E 3.0 and so does AMD's 7970 on X79, so hopefully there is some serious effort on nVidia's part to get PCI-E 3.0 working again. X79 is suppose to be the premier high-end platform for 4-way SLI so hopefully I can get my four GTX 680's up to full speed, and the PCI-E 3.0 speed boost DOES matter for those of us in 4-way SLI where the slots get reduced down to 8x.



Could you also make sure in your X79 testing to "Certify" the Asus Rampage IV Extreme motherboard as it is one of the most popular X79 boards out there. Thanks!





I'll check if the Asus Rampage IV Extreme motherboard is being certified.

Please send me a PM if I fail to keep up on replying in any specific thread or leave a driver feedback: Driver Feedback

#4
Posted 04/04/2012 07:33 PM   
[quote name='ManuelG' date='04 April 2012 - 02:33 PM' timestamp='1333568034' post='1392024']
I'll check if the Asus Rampage IV Extreme motherboard is being certified.
[/quote]


It is great to see NVIDIA communicating with their users, something that AMD fails pretty bad at on their forums. It will be nice to use drivers other than the launch drivers with my GTX 680's. I look forward to your response on the Rampage IV Extreme. /thanks.gif' class='bbc_emoticon' alt=':thanks:' />
[quote name='ManuelG' date='04 April 2012 - 02:33 PM' timestamp='1333568034' post='1392024']

I'll check if the Asus Rampage IV Extreme motherboard is being certified.







It is great to see NVIDIA communicating with their users, something that AMD fails pretty bad at on their forums. It will be nice to use drivers other than the launch drivers with my GTX 680's. I look forward to your response on the Rampage IV Extreme. /thanks.gif' class='bbc_emoticon' alt=':thanks:' />

#5
Posted 04/04/2012 07:49 PM   
Bump, found out that using the launch drivers that enable PCI-E 3.0 by defauly on X79, or adjusting the registry setting with current drivers breaks Surround mode. Look's like I am stuck at PCI-E 2.0 until this driver issue gets resolved. /wallbash.gif' class='bbc_emoticon' alt=':wallbash:' />

I will post some benchmarks soon comparing PCI-E 2.0 vs 3.0 to show why it is important for those of us with 3-4 GPU's on X79.
Bump, found out that using the launch drivers that enable PCI-E 3.0 by defauly on X79, or adjusting the registry setting with current drivers breaks Surround mode. Look's like I am stuck at PCI-E 2.0 until this driver issue gets resolved. /wallbash.gif' class='bbc_emoticon' alt=':wallbash:' />



I will post some benchmarks soon comparing PCI-E 2.0 vs 3.0 to show why it is important for those of us with 3-4 GPU's on X79.

#6
Posted 04/06/2012 11:36 PM   
Well, the results of my PCI Express 2.0 versus 3.0 on my 4-way SLI GTX 680 FW900 Surround setup are in. The results are so incredible I had to start the tests over from scratch and run them multiple times for confirmation! :eek:

Test setup:

3960X @ 5.0 GHz (temp slow speed)
Asus Rampage IV Extreme with PCI-E slots running 16x/8x/8x/8x
(4) EVGA GTX 680's running 1191MHz core, 3402 MHz Memory
nVidia Driver 301.10 with PCI-E 3.0 registry adjustment turned on and off for each applicable tes
GPU-Z 0.6.0

[IMG]http://i119.photobucket.com/albums/o139/callsign_vega/SANY0003-12.jpg[/IMG]


After PCI-E settings changed, confirmed with GPU-Z:

[IMG]http://i119.photobucket.com/albums/o139/callsign_vega/PCI-E20.gif[/IMG]

[IMG]http://i119.photobucket.com/albums/o139/callsign_vega/PCI-E30.gif[/IMG]


All settings in nVidia control panel, in-game and in benchmark, EVGA precision are all UNTOUCHED between benchmark runs. The only setting adjusted is the PCI-E 2.0 to 3.0 and back and forth for confirmation (Reboots obviously for registry edit).


[IMG]http://i119.photobucket.com/albums/o139/callsign_vega/PCI-ETests.jpg[/IMG]


I kid you not, that is how much PCI-E 2.0 running at 16x/8x/8x/8x versus PCI-E 3.0 bottlenecks BF3 and Heaven 2.5 at these resolutions. I attribute this to the massive bandwidth being transferred over the PCI-E bus. We are talking 4-way SLI at up to 10-megapixels in alternate frame rendering. Entire frames at high FPS are being swapped and PCI-E 2.0 falls on it's face.

The interesting part was that while running PCI-E 2.0, the GPU utilization dropped way down as would be typically seen if you are "CPU" limited. In this instance I am not CPU limited, nor GPU limited. We are really at a point now that you can be PCI-E limited unless you go PCI-E 3.0 8x (16x PCI-E 2.0) or faster on [B]all GPU[/B]'s in the system. GPU utilization dropped down into the ~50% range due to PCI-E 2.0 choking them to death. As soon as I enabled PCI-E 3.0, the GPU utilization skyrocketed to 95+% on all cores. I was going to run more benchmarks and games but the results are such blow-outs it seems pretty pointless to do any more. It may interest some of those out there running these new PCI-E 3.0 GPU's in which they think they are CPU limited (below 95% GPU utilization) yet might have PCI-E bandwidth issues.

Down to the nitty gritty; if you run a single GPU, yes; a single [B]16x[/B] speed PCI-E 2.0 slot will be fine. When you start to run multiple GPU's and/or run these new cards at 8x speed, especially in Surround/Eyefinity, make sure to get PCI-E 3.0. /wink.gif' class='bbc_emoticon' alt=';)' />


More on my system: http://www.overclock.net/t/1220962/vegas-heavyweight-display-and-computer-edition-2012
Well, the results of my PCI Express 2.0 versus 3.0 on my 4-way SLI GTX 680 FW900 Surround setup are in. The results are so incredible I had to start the tests over from scratch and run them multiple times for confirmation! :eek:



Test setup:



3960X @ 5.0 GHz (temp slow speed)

Asus Rampage IV Extreme with PCI-E slots running 16x/8x/8x/8x

(4) EVGA GTX 680's running 1191MHz core, 3402 MHz Memory

nVidia Driver 301.10 with PCI-E 3.0 registry adjustment turned on and off for each applicable tes

GPU-Z 0.6.0



Image





After PCI-E settings changed, confirmed with GPU-Z:



Image



Image





All settings in nVidia control panel, in-game and in benchmark, EVGA precision are all UNTOUCHED between benchmark runs. The only setting adjusted is the PCI-E 2.0 to 3.0 and back and forth for confirmation (Reboots obviously for registry edit).





Image





I kid you not, that is how much PCI-E 2.0 running at 16x/8x/8x/8x versus PCI-E 3.0 bottlenecks BF3 and Heaven 2.5 at these resolutions. I attribute this to the massive bandwidth being transferred over the PCI-E bus. We are talking 4-way SLI at up to 10-megapixels in alternate frame rendering. Entire frames at high FPS are being swapped and PCI-E 2.0 falls on it's face.



The interesting part was that while running PCI-E 2.0, the GPU utilization dropped way down as would be typically seen if you are "CPU" limited. In this instance I am not CPU limited, nor GPU limited. We are really at a point now that you can be PCI-E limited unless you go PCI-E 3.0 8x (16x PCI-E 2.0) or faster on all GPU's in the system. GPU utilization dropped down into the ~50% range due to PCI-E 2.0 choking them to death. As soon as I enabled PCI-E 3.0, the GPU utilization skyrocketed to 95+% on all cores. I was going to run more benchmarks and games but the results are such blow-outs it seems pretty pointless to do any more. It may interest some of those out there running these new PCI-E 3.0 GPU's in which they think they are CPU limited (below 95% GPU utilization) yet might have PCI-E bandwidth issues.



Down to the nitty gritty; if you run a single GPU, yes; a single 16x speed PCI-E 2.0 slot will be fine. When you start to run multiple GPU's and/or run these new cards at 8x speed, especially in Surround/Eyefinity, make sure to get PCI-E 3.0. /wink.gif' class='bbc_emoticon' alt=';)' />





More on my system: http://www.overclock.net/t/1220962/vegas-heavyweight-display-and-computer-edition-2012

#7
Posted 04/07/2012 11:16 AM   
Hitting VRAM limit and PCI-E 2.0 vs 3.0 battle video tests. Make sure to watch in 480P instead of lower (I forgot to set the camera back to 720P and I don't feel like recording everything all over again lol). Sorry about the video quality but it is still view-able.

http://www.youtube.com/watch?v=S0-xcxAvu54&context=C4435d1aADvjVQa1PpcFOpwHlB70YlOHjBhzZ8mtcWAKgkFdz3LBo=

http://www.youtube.com/watch?v=tkZzssm-kWs&context=C41467ecADvjVQa1PpcFOpwHlB70YlOALsTk3pZxTxt4tbGt5H9Yk=
Hitting VRAM limit and PCI-E 2.0 vs 3.0 battle video tests. Make sure to watch in 480P instead of lower (I forgot to set the camera back to 720P and I don't feel like recording everything all over again lol). Sorry about the video quality but it is still view-able.



/>


#8
Posted 04/07/2012 08:20 PM   
Tnx for the info, im getting x79 in the near future /smile.gif' class='bbc_emoticon' alt=':smile:' />
Tnx for the info, im getting x79 in the near future /smile.gif' class='bbc_emoticon' alt=':smile:' />

GPU: Inno3D GTX 580 1536MB OC
Monitor: EIZO Foris FS2333 [DVI-D]
CPU: Intel i7 4770K @ 4.5GHz [1.178v] | Corsair H90 custom P/P fans
Mainboard: Asus Z87-Deluxe [Bios 1802]
Ram:Crucial Balistix Elite 16GB CL10/1T @ 2400MHz [1.65v]
Sound: X-FI Titanium HD [Pcie SB1270]
HDD: Intel SSD 330 180Gb; Samsung F3 1Tb; Hitachi 500Gb
PSU: Chieftec NiTRO88+ 650w [52A]
OS: Windows 8.1.1 Pro WMC x64


Image

#9
Posted 04/07/2012 09:50 PM   
Another user here with X79 and 2-way SLI 680s. I am planning to pick up a third dependent on PCIE 3.0 support being added for X79.

Intel has marketed and confirmed full PCIE 3.0 support on the X79 platform. As well, my current motherboard, ASUS Rampage IV Extreme supports full PCIE 3.0 http://ca.asus.com/en/Motherboards/Intel_Socket_2011/Rampage_IV_Extreme/#specifications and I had full support when running a Radeon 7970 previously.

Nvidia please have this enabled for our GTX 680s.

Thanks.
Another user here with X79 and 2-way SLI 680s. I am planning to pick up a third dependent on PCIE 3.0 support being added for X79.



Intel has marketed and confirmed full PCIE 3.0 support on the X79 platform. As well, my current motherboard, ASUS Rampage IV Extreme supports full PCIE 3.0 http://ca.asus.com/en/Motherboards/Intel_Socket_2011/Rampage_IV_Extreme/#specifications and I had full support when running a Radeon 7970 previously.



Nvidia please have this enabled for our GTX 680s.



Thanks.

#10
Posted 04/08/2012 12:55 PM   
Nice, glad to see someone else backing up my tests. Although the difference isn't as dramatic as mine due to a lower resolutions and card count, they are still very impressive differences. :thumb:


[img]http://cdn.overclock.net/1/10/10b499c8_DIFFERENCE.jpeg[/img]

From user: psikeiro.
Nice, glad to see someone else backing up my tests. Although the difference isn't as dramatic as mine due to a lower resolutions and card count, they are still very impressive differences. :thumb:





Image



From user: psikeiro.

#11
Posted 04/09/2012 05:08 AM   
ttt
ttt

#12
Posted 04/09/2012 10:15 PM   
Callsign Vega, you seem to be missing information in that graph of yours as it doesn't explain what each coloured bar represents... it's just 6 randomly long coloured bars o_O

Is it 8 tests, each consisting of a min, max and average value?
Callsign Vega, you seem to be missing information in that graph of yours as it doesn't explain what each coloured bar represents... it's just 6 randomly long coloured bars o_O



Is it 8 tests, each consisting of a min, max and average value?

Custom built PC | Intel Core i7 920 @ 2.66GHZ | ASUS P6T Motherboard | 6GB DDR3 1600 RAM | 2x 500GB SATA2 HDD's | Auzentech Forte S/C | Gainward Geforce GTX 560Ti "Phantom 2" 2048MB | Windows 7 Home Premium: Service Pack 1 - x64 | Thermaltake 750watt Toughpower Power Supply | Thermaltake Armor+ MX case.

#13
Posted 04/10/2012 12:18 AM   
That last chart isn't mine. But the bars mean min/avg/max over two runs.
That last chart isn't mine. But the bars mean min/avg/max over two runs.

#14
Posted 04/10/2012 05:14 PM   
[quote name='yoshaplumps' date='08 April 2012 - 07:55 AM' timestamp='1333889705' post='1393325']
Another user here with X79 and 2-way SLI 680s. I am planning to pick up a third dependent on PCIE 3.0 support being added for X79.

Intel has marketed and confirmed full PCIE 3.0 support on the X79 platform. As well, my current motherboard, ASUS Rampage IV Extreme supports full PCIE 3.0 http://ca.asus.com/en/Motherboards/Intel_Socket_2011/Rampage_IV_Extreme/#specifications and I had full support when running a Radeon 7970 previously.

Nvidia please have this enabled for our GTX 680s.

Thanks.
[/quote]

Yes, there should be no reason not to enable it with the GTX 680's. I've been running 4-way GTX 680 SLI now just fine on X79 with the registry edit using 301.25 and zero problems. Using Asus Rampage IV Extreme.
[quote name='yoshaplumps' date='08 April 2012 - 07:55 AM' timestamp='1333889705' post='1393325']

Another user here with X79 and 2-way SLI 680s. I am planning to pick up a third dependent on PCIE 3.0 support being added for X79.



Intel has marketed and confirmed full PCIE 3.0 support on the X79 platform. As well, my current motherboard, ASUS Rampage IV Extreme supports full PCIE 3.0 http://ca.asus.com/en/Motherboards/Intel_Socket_2011/Rampage_IV_Extreme/#specifications and I had full support when running a Radeon 7970 previously.



Nvidia please have this enabled for our GTX 680s.



Thanks.





Yes, there should be no reason not to enable it with the GTX 680's. I've been running 4-way GTX 680 SLI now just fine on X79 with the registry edit using 301.25 and zero problems. Using Asus Rampage IV Extreme.

#15
Posted 04/14/2012 06:39 PM   
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