It shouldn't, maybe a little but no one knows yet. But I would wait a little while until everything is sorted out with this project in regards to 6xx.

Wish NVIDIA dev's would fix this x79 PCIE issue (currently only allows PCIE 2.0 until they "certify" everything). Once this happens I'll be able to report the differences in runtimes between varying PCIE speeds (can switch it on mobo in BIOS).

I guess I've missed something somewhere. What's not sorted out wrt 6xx series?

Yes, but this is untested. My guess ~4.5%
AMD don't support PCIE3.0 Motherboards/CPU's!!
Also, worth noting again that there is no XP support for GTX600's.
For a single card I'm thinking IB is the best option, but outlay for such a rig is very high, and I'm convinced that moving from SB to IB is not a realistic upgrade; it's more of a detour!
As AMD offer much cheaper systems they make good sense. >90% as efficient at half the outlay price makes sense. Running costs is open to debate, especially if you replace often.

So, for a single card (especially GTX670 or less) don't let PCIE2 deter you.

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@Dagorath,

I was just referring to the issues in the researchers coding and getting the app out. Once the actual app is out, we will be able to test for ourselves to see the difference between PCIE 2 & 3 ourselves.

But as skgiven noted, PCIE 3 is not on AMD cpus and motherboards.

@5pot,

OK. I thought you were saying this project might end up not supporting 6xx. It's just PCI 2 vs. PCI 3 that needs investigation.

@skgiven

I think I'll go for a 680 on this PCI 2 board. All I'll need is the GPU and a PSU upgrade. If performance isn't decent I'll upgrade the mobo later, maybe when cost of IB goes down a bit, maybe never. With more and more projects supporting GPUs, buying powerful CPUs doesn't make as much sense as it used to. A good GPU, even with a small performance hit from running on PCI 2.0 rather than PCI 3.0, still gives incredible bang for buck compared to a CPU.

View PCIe 3 as a bonus if you get it, but noting else. At least for GPU-Grid.

For a single card I'm thinking IB is the best option, but outlay for such a rig is very high, and I'm convinced that moving from SB to IB is not a realistic upgrade; it's more of a detour!

Of course it's not an upgrade which makes sense for people already owning a SB - it's not meant to be, anyway. However, IB is a clear step up from SB. It's way more power efficient and features slightly improved performance per clock. Never mind the people complaining about overclockability. Which cruncher in his/her right mind is pushing his SB to 4.5+ GHz at 1.4 V for 24/7 anyway? And if you run IB at ~4.4 GHz and ~1.1 V you'll be a lot more efficient than if you'd push a SB up to this clock range. I'd even say you could run IB 24/7 in this mode.

MrS

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Scanning for our furry friends since Jan 2002

View PCIe 3 as a bonus if you get it, but noting else. At least for GPU-Grid.

For a single card I'm thinking IB is the best option, but outlay for such a rig is very high, and I'm convinced that moving from SB to IB is not a realistic upgrade; it's more of a detour!

Of course it's not an upgrade which makes sense for people already owning a SB - it's not meant to be, anyway. However, IB is a clear step up from SB. It's way more power efficient and features slightly improved performance per clock. Never mind the people complaining about overclockability. Which cruncher in his/her right mind is pushing his SB to 4.5+ GHz at 1.4 V for 24/7 anyway? And if you run IB at ~4.4 GHz and ~1.1 V you'll be a lot more efficient than if you'd push a SB up to this clock range. I'd even say you could run IB 24/7 in this mode.

MrS

I run My 2600k @ 4.5 Ghz @1.28V 24/7. But I also run 7 threads of either WCG or Docking at the same time.

At the moment I'm sticking with my 560ti. Clocked at 925 it completes long tasks in 8-15 hours.
Would love to upgrade to Kepler. Being in Australia though means an automatic 50% markup in price sadly. I will not pay $750 for a 680 or $600 for a 670.
Guess I'll be waiting until the 780's or whatever they end up calling them come out and push the prices down(I hope)

x79 for me from now on. 40 PCIe lanes direct to CPU. Pure goodness. No detours, and higher lane bandwidth with multiple cards.

Right now at MC, a 3820 can be had for $230 in store. Kinda hard to beat that deal.

If using Windows, you currently gotta hack registry (easy to do) to get PCIe 3 working though.

Despite using CUDA this app is very different to the one here and it would be wrong to think such performance is likely here.

skgiven,

Can you explain that statement a bit more?

I am trying to select my next gpugrid-only card with a budget of $400 - $500 ( max).

It will run gpugrid 24x7.

Right now it looks like the 670 is my best value.

Any additional data, formal or anecdotal is greatly appreciated.

Ken

It means that Folding@Home is a different CUDA project. Which means that the relative performance of cards with different architectures may not be the same on GPU-Grid.

Anyway, the app supporting Kepler should be out in a few days and we'll have hard numbers. So far GTX670 looks pretty good here.

MrS

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Scanning for our furry friends since Jan 2002

Nice specs from VideoCards, albeit speculative:

GeForce 600 Series GPU CUDA Cores Memory Memory Interface Launch Price Release
GeForce GT 640 D3 GK107 384 1GB / 2GB GDDR3 128-bit $99 April
GeForce GT 640 D5* GK107 384 1GB / 2GB GDDR5 128-bit $120 August
GeForce GT 650 Ti* GK106 960 1GB / 2GB GDDR5 192-bit $120 – $160 August
GeForce GTX 660* GK106 1152 1.5 GB GDDR5 192-bit $200 – $250 August
GeForce GTX 660 Ti* GK104 1344 1.5GB / 3GB GDDR5 192-bit $300 – $320 August
GeForce GTX 670 GK104 1344 2GB / 4GB GDDR5 256-bit $399 May
GeForce GTX 680 GK104 1535 2GB / 4GB GDDR5 256-bit $499 March
GeForce GTX 690 2xGK104 3072 4GB GDDR5 512-bit $999 May

*Not yet released
http://videocardz.com/33814/nvidia-readies-geforce-gtsx-650-ti-for-august

The 660Ti might be a sweet card for here, if the specs are true, and we would have a good mid-range to choose from. No mention of a 768 card though, and there is a bit of a gap between 960 and 384. Their imagination doesn't seem to stretch down to a GT 650 (no Ti, 768). I can't see a GT650Ti going for the same as a GT640 either, and if a 960 card cost $120, you could just buy 2 and outperform a GTX680 (all else being equal) and save ~$260. With those specs 3 GT650Ti's would almost match a GTX690, but cost ~half as much.

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