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Sli 470 or CF 5870?

Arcane said:
I couldn't get my 5850cf past 930 stable even with uncomfortable levels of voltage, still a good overclock though, 28% I believe.

470sli does 750 on stock volts=24%, 775 on 1000mv=28% and 800 on 1087=32%, so comparatively the 470 overclocks better than my 5850 did.
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HD5850's seem to clock much the same, definitely not far off what the HD5870's can do.

I think 930 would be a 22% overclock, not bad at all.
 
ebilcake said:
HD5850's seem to clock much the same, definitely not far off what the HD5870's can do.

I think 930 would be a 22% overclock, not bad at all.
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Stock clock is 725 so 10% = 72.5. 20% = 145. 30%= 217.5 which added to 725 = core clock of 942.5 so 930 is more around 28.5%.

Where 930 is a decent clock its not that great compared to most of the 5850 cards we have seen that use the original design. Greebo for instance can hit 1100 core on his 5850 which is around a 50% overclock. Imo where overclocking is concerned the 5850 is still the king when you can alter the voltages.
 
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I just returned my Zotac GTX 480's for a refund and have put back in my Saphire 5870 Toxic's. I'm hoping with the refund from the 480's to buy a 5970 Toxic and go trifire.
 
TheRealDeal said:
Where 930 is a decent clock its not that great compared to most of the 5850 cards we have seen that use the original design. Greebo for instance can hit 1100 core on his 5850 which is around a 50% overclock. Imo where overclocking is concerned the 5850 is still the king when you can alter the voltages.
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I somehow doubt Greebo's card represents how the average HD5850 overclocks under stock cooling.
 
ebilcake said:
I somehow doubt Greebo's card represents how the average HD5850 overclocks under stock cooling.
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It may not be but i don't think 930 for a stock card represents this also. I may be mistaken but i am pretty sure the 5850 cores allow you to give more voltage than the 5870 cores so can usually go a little higher when overclocking than the 5870's. My guess is that the average would be around 1000 core which is somewhere around 37%.
 
TheRealDeal said:
It may not be but i don't think 930 for a stock card represents this also. I may be mistaken but i am pretty sure the 5850 cores allow you to give more voltage than the 5870 cores so can usually go a little higher when overclocking than the 5870's. My guess is that the average would be around 1000 core which is somewhere around 37%.
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I remember a site had a list of all the overclocks users were getting and worked all this out, trying to figure out where this was from.... maybe you know?
 
This is all confusing me on my choice, on some guides the reviewer thinks that the 470(s) is the better future proof card and that SLI scales better than ATI.
The heat and noise wont bother me because im watercooling and will be overclocking them to the max :D.
 
You also have to remember that the OP was talking about multi-gpu setups, so the chance of getting sky high over clocks with stock cooling on both cards is reduced as you're limited by the weakest of the two as well as the extra heat.
 
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