PCIe is backwards compatible, so newer cards should work fine in that slot. However, cards which mechanically fit such slots are normally really low-performance models, if you can find any. They're not suitable for GPU-Grid. And if there was a high-performance model it would be limited by the bandwidth.

This slot is meant for audio, network or storage controller cards.

MrS
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Scanning for our furry friends since Jan 2002

So your sure its not a problem to run a 570 gtx in a pci-e 1.0 x4 slot?

The CC 2.0 Fermis can use all their shaders here, whereas CC2.1 Fermis (GTX560Ti and lower, GTX460 and lower) could only use 2/3 of their shaders here. It's the same for all Keplers, but the ratio seems to have improved a bit in recent app updates. When comparing cards of different architectures and CC levels GFlops are not everything. With the same CC level GFlops are a very good approximation, though.

I'd still say Kepler is definitely better than Fermi, here and for other projects, as it's significantly more power efficient, even if it needs some more GFlops to achieve the same performance.

MrS
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Scanning for our furry friends since Jan 2002

In the UK the GTX660Ti costs less to buy than a GTX760. They should do about the same amount of work, and the GTX660Ti might be slightly more power efficient. The GTX660Ti might also work better at other projects which rely less on Memory Bandwidth, which hinders the GTX660Ti here somewhat (but this varies slightly depending on WU type). I found the stability and performance of my GTX660Ti to be good even when using the third slot in my system (PCIE2 X4) via a riser. The issue here is power; not all PCIE slots deliver good power, so the 2x6pin power connection (150W) actually matches the TDP of the GPU - it doesn't need to draw power over the PCIE slot and raiser. For me it's an excellent choice for the third slot of my main system.
I read a review of an Asus GTX760 which uses one 8-pin power connection. This is very attractive to me as I have a Corsair PSU with 4x6/8pin power connections. In theory I could replace the GTX660 (move it to another rig) and the HD5850 (pass it on) and get two GTX760's...
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My question would be why would you recommend a 660ti over a 760. It probably doesnt matter to me in the end because a 760 is whats going to be concentrated on in the future is my opinion. I do understand the apps probably fit a 660 better currently. :D ill let you fill in the rest. 20 watts but for next generation power :\

ETA is 100% correct. A GTX 760 *is* a GTX 670...

wouldn't you rather get 2 more GTX660Ti's? ;)

Thanks for the clarification, SK. The different numbers of shaders, clock speeds and memory controllers are what I meant by "different configurations". When saying they're all the same architecture I meant they're Keplers with CUDA compute capability 3.0, which is all that's needed to target them for software optimizations.

@Bugler: I can't speak for the US, but our price comparison tool shows GTX760 starting at 225€ and GTX660Ti at 190€ in Germany (available, from reputable dealer and manufacturer, good open air cooler). That's in € and includes VAT, so the numbers normally compare well with your US prices. And it's about at 20% difference, just as SK said (he's shopping in the UK).

MrS
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Scanning for our furry friends since Jan 2002

The GTX660Ti has dropped in price relative to the other cards as a direct result of the GTX760 arriving, and lots of misleading reviews of highly overclocked 760's against last years reference 660Ti's (915MHz). I could now buy a GTX660Ti for ~£180. 5 weeks ago it was £220.
While some 760's have fallen from ~£210 to just under £200, many are still as expensive as their initial release price.
The GTX650TiBoost's price has now equilibriated, but the GTX660 prices haven't changed much recently.
In the UK the GTX660Ti is now on power with the GTX660 in terms of performance per purchase cost. As it's the bigger, faster card it's a better buy if you have a limited number of systems/PCIE slots. In terms of performance/overall system power it's also the winner. The GTX670 has come down a bit, but it's still too expensive compared to the GTX660Ti. This is due to it's position between a GTX660Ti/GTX760 and a GTX680/770.
Of course IT hardware prices change quickly and vary by location.
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I checked pricegrabber.com with a setting for the US (I don't think I have to check all the other American countries as well) and the prices were indeed pretty much the same: 242$ for GTX660Ti and 249$ for GTX760. What a pity!

MrS
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Scanning for our furry friends since Jan 2002

The GTX660Ti is 14% cheaper in the US than in the UK, but the GTX760 is 20% cheaper in the US.
It's a pity they both weren't cheaper here.
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