GeForce GTX 680 Release Driver Limits PCI-Express to Gen 2.0 on X79/SNB-E Systems

[mike_6289]

hmm, if i remember correctly in the old bench of the HD 7900 series, impact of PCI-E 3.0 vs 2.0 has very little effect on gaming, but its noticeable on GPGPU tasks that requires massive amount of data to be delivered in the PCIE lane, i wonder if this cripples the GK104 more with its inferior GPGPU performance.

Probably not because there's less data

 

[Aquinus]

Probably not because there's less data

I don't think it is that much less...

 

[Jurassic1024]

To create Kepler GeForce cards, nVIDIA removed a lot of the GPGPU components to separate it from the Quadro cards. Basically, with the 600 series, GeForce is more of a gamers GPU now than before.

 

[Badelhas]

A little off-topic: what is the performance impact in a x8x8x4 SLI configuration?

Cheers

 

[Aquinus]

A little off-topic: what is the performance impact in a x8x8x4 SLI configuration?

Cheers

Assuming that you're talking about PCI-E 2.0, I think it would be noticeable since the 7970 struggles with PCI-E 2.0 x8, let alone x4. Now PCI-E essentially doubles bandwidth, so x8 would be less of a problem, but the x4 would most likely still bottleneck. If you were planning on running GTX 680s in 3-way SLI, I wouldn't recommend it with that few PCI-E lanes.

 

[Badelhas]

Assuming that you're talking about PCI-E 2.0, I think it would be noticeable since the 7970 struggles with PCI-E 2.0 x8, let alone x4. Now PCI-E essentially doubles bandwidth, so x8 would be less of a problem, but the x4 would most likely still bottleneck. If you were planning on running GTX 680s in 3-way SLI, I wouldn't recommend it with that few PCI-E lanes.

Yes, I was refering to PCI-e 2.0, but the cards would be GTX570. Same thing? Do you have any links where someone did benchmarks to comprove it? I ask this because I have a P8Z68-V Pro, that offically only supports x8x8 dual SLI, but it does have a x4 extra PCI-e...
Thanks again.

Cheers,

 

[Aquinus]

Yes, I was refering to PCI-e 2.0, but the cards would be GTX570. Same thing? Do you have any links where someone did benchmarks to comprove it? I ask this because I have a P8Z68-V Pro, that offically only supports x8x8 dual SLI, but it does have a x4 extra PCI-e...
Thanks again.

Cheers,

The x8 should be fine for the 570, but my concern would be the x4 slot. I'm not sure how well it will perform. Also SLI and Crossfire scaling at 3 GPUs isn't very widely supported. I would recommend just two 570 at the moment. You haven't filled in your current system specs, so I can't give too much of a recommendation, but if you're not running multi-monitors and not higher than 1920x1200, just two should work nicely.

 

[Badelhas]

The x8 should be fine for the 570, but my concern would be the x4 slot. I'm not sure how well it will perform. Also SLI and Crossfire scaling at 3 GPUs isn't very widely supported. I would recommend just two 570 at the moment. You haven't filled in your current system specs, so I can't give too much of a recommendation, but if you're not running multi-monitors and not higher than 1920x1200, just two should work nicely.

Thanks for your reply. I play mostly at 720p 3D Vision with a 88´´ Screen
I just filled my specs. Did you ever find any benchs of Sli in a x4 lane?

Cheers

 

[Aquinus]

Thanks for your reply. I play mostly at 720p 3D Vision with a 88´´ Screen
I just filled my specs. Did you ever find any benchs of Sli in a x4 lane?

Cheers

Check this out, it's for a 480 but the results should be about the same: http://www.tomshardware.com/reviews/pcie-geforce-gtx-480-x16-x8-x4,2696-9.html

 

[Badelhas]

Check this out, it's for a 480 but the results should be about the same: http://www.tomshardware.com/reviews/pcie-geforce-gtx-480-x16-x8-x4,2696-9.html

Thanks
But that test is for a single card in a x4 lane. Does this means only one of the cards in the Tri-SLI will be up to 20% slower or all of the cards will? I would like to find a benchmark or someone who tried Tri-SLI with one of the lanes at x4 speed so we would really know.

Cheers

 

[Erwinna]

Help!

I need your help, oh wise ones. I would like the know if the GTX 680 card is compatible with my system (I am not really a techie so I am scouring the forums for some input). Here are my specs:

Core i7-2700K BX80619i72700K Unlocked Processor - Quad Core, 8MB L3 Cache, 1MB L2 Cache, 3.50 GHz (3.90 GHz Max Turbo), Socket H2 (LGA1155), 95W, Fan, Retail

GIGABYTE GA-Z68X-UD3H-B3 Intel Z68 Motherboard - ATX, Socket H2 (LGA 1155), Intel Z68 Chipset, 2133MHz DDR3, SATA 6.0 Gb/s, RAID, 7.1-CH Audio, Gigabit LAN, SuperSpeed USB

2 x HyperX Genesis 8GB DDR3-1600MHz CL9 Dual Channel Kit (2 x 4GB) w/ Intel XMP RAM
Sapphire (11179-13-20G) AMD Radeon HD 6870 1GB GDDR5 Video card

Corsair Force Series 3 120GB 2.5" SATA 6Gb/s Solid State Drive (SSD), Read: 550MB/s Write: 510MB/s, includes 2.5" to 3.5" bracket (CSSD-F120GB3-BK)

Seagate ST31000524AS Barracuda Hard Drive - 1TB, SATA 6Gbps, 7200 RPM, 32MB

Hydro H60 High Performance CPU Cooler
Corsair Professional Series 700 Watt PSU

Supports SATA 3 (6gb/s), USB 3.0, dual PCI-e slots for sli or crossfire setups. The mobo also has dual bios. 3.0, CrossFireX/SLI Ready.

 

[Aquinus]

I need your help, oh wise ones. I would like the know if the GTX 680 card is compatible with my system

I see no problem running one, a bigger power supply and you could run two in SLI with your platform. I would say if you're looking for a new toy, go ahead and have fun.

 

[Jurassic1024]

hmm, if i remember correctly in the old bench of the HD 7900 series, impact of PCI-E 3.0 vs 2.0 has very little effect on gaming, but its noticeable on GPGPU tasks that requires massive amount of data to be delivered in the PCIE lane, i wonder if this cripples the GK104 more with its inferior GPGPU performance.

Why would it cripple it MORE THAN THE 7900'S if it's inferior? You know what inferior means right?

 

[Jurassic1024]

Thanks for your reply. I play mostly at 720p 3D Vision with a 88´´ Screen
I just filled my specs. Did you ever find any benchs of Sli in a x4 lane?

Cheers

I remember my P5K-E had Crossfire support with two PCIe x16 slots. One was wired for x16, and the other being wired for x4 . If it was bad back then, and it was, it's no better now.

 

[Aquinus]

I remember my P5K-E had Crossfire support with two PCIe x16 slots. One was wired for x16, and the other being wired for x4 . If it was bad back then, and it was, it's no better now.

I couldn't agree more. Next time try to not double post. If no one has posted, I recommend editing your last post instead of posting again. Thanks for your input.