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5850 vs 5870 overclocks

post #1 of 11
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So the ATI 5850 overclocks to 1000 core 1050 memory at 1.25v (with voltage tweak)

The 5870 is a XFX and owner overclocked it up to 970 core and 1200 memory at 1.125v also with voltage tweak, so both cards could possibly go higher in OC.

Which one is faster though with the overclock mentioned?
    
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post #2 of 11
Quote:
Originally Posted by ztmike View Post
So the ATI 5850 overclocks to 1000 core 1050 memory at 1.25v (with voltage tweak)

The 5870 is a XFX and owner overclocked it up to 970 core and 1200 memory at 1.125v also with voltage tweak, so both cards could possibly go higher in OC.

Which one is faster though with the overclock mentioned?
The 5850 has 1440 Shader Processors while the 5870 has 1600, more processors; faster card.

Edit: After looking at multiple benchmarks, it looks like a stock 5870 is roughly 15~20% faster than a stock 5850. But I'm guessing by the fact that it's only 30Mhz difference on the core, and a 150Mhz difference on the memory speeds that the 5870 will still be the faster card, by about 15~20%

Edit 2: Found this and number 2 there states:

Quote:
2: At the same clock speeds the 5870 is about 5% faster overall. In shader intensive tests this increases to ~10%, which is to be expected because the 5850 has 10% less shader cores.
There you go
Edited by CovertCover - 1/18/11 at 3:49pm
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post #3 of 11
Quote:
Originally Posted by ztmike View Post
so the ati 5850 overclocks to 1000 core 1050 memory at 1.25v (with voltage tweak)

the 5870 is a xfx and owner overclocked it up to 970 core and 1200 memory at 1.125v also with voltage tweak, so both cards could possibly go higher in oc.

Which one is faster though with the overclock mentioned?
5870.
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post #4 of 11
The 5850 has 1440 SP compared the the 5870s 1600. Also, isn't the chip architecture slightly different. At those clocks I am positive the 5870 will be the faster card.
post #5 of 11
5870. No more need be said.
 
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post #6 of 11
I was still getting better performance in games with a single 5870 overclocked to 950hz than compared with my friend's 5850 overclocked to 1000mhz.
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post #7 of 11
Just say you don't know instead of guessing. OP go read some reviews that discuss the card's architectures
post #8 of 11
Quote:
Originally Posted by Poisoner View Post
Just say you don't know instead of guessing. OP go read some reviews that discuss the card's architectures
Gaming benchmarks is not considered "guessing" is it?
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post #9 of 11
won't make that big of a difference in most games:

http://www.xbitlabs.com/articles/vid...0_5.html#sect4

edit: the memory clock difference will affect the results more than the given core speed difference at those core speeds.
Edited by gamervivek - 1/18/11 at 3:59pm
    
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post #10 of 11
Quote:
Originally Posted by NitrousX View Post
Gaming benchmarks is not considered "guessing" is it?
For this topic yeah.
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