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How much better is a 6950 (unlocked to a 6970) than a 5850? - Page 2

post #11 of 14
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Quote:
Originally Posted by tryceo View Post
But if you have a powerful PSU, it wont matter.
Hopefully my Antec Truepower 650W should be up to the task.
post #12 of 14
If it only has 1 6 pin connector, then the rest of the power is coming through the PCI-e slot. I would not rely on that for serious overclocking, unless voltage for the slot can be raised in the motherboard BIOS (like the AGP voltage of yore).

Edit: Just looked up the 6950, and saw pictures. It has 2x 6 pin power connectors. It's fine for overclocking, but the RAM used on it is spec'd to run exactly where stock speeds are, so any bump will be OCing it. I wonder if that's where some people are running into artifacts when unlocking; not from the shader section, but from pushing the RAM beyond its specified limit. Not all chips overclock well, if at all. If a modified BIOS is made to enable the extra shaders and increase the core clock, without touching the RAM, I suspect that everyone would be able to do that. Even if left as stock, the 6950 is a very mean card.

Quote:
Originally Posted by kiwiasian View Post
power is a non-issue...
a high quality psu will handle it just fine...

The PSU supplies power, so it's the foundation of a system, but after that, any overclocking depends on voltage stability in the individual hardware. A high quality PSU with a junk board is just as bad as a junk PSU with high quality board.
Edited by UnexplodedCow - 12/28/10 at 7:18am
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post #13 of 14
power is a non-issue...
a high quality psu will handle it just fine...
post #14 of 14
Quote:
Originally Posted by xaeonit View Post
That looks good, but if overclocked my hd5850 is as good (or better) as a hd5870. My gpu score is 19k in 3dmark vantage. So, if a 5850 can be fast as a 5870, and a 6950 can be fast as a 6970, than I don't think it is a good upgrade, unless you're planning to crossfire them.
6970 is just 12% than the 5870.
I'm assuming you're overclocking the 5850. The last time I tried on mine, yes, it was as fast as a 5870, considering the GPU was 1000 Mhz, and the RAM around 1350. Yet the card would still have slight stuttering, and didn't like putting on lots of AA. So far the 6970 is doing better with that. Also, I haven't installed the 10.12a hotfix yet. I'm expecting to see later drivers increase performance. It's pretty much how things were a year ago;

I almost bought a 4890 then because it was less expensive compared to the 5850, and performance really wasn't all too different, but I wanted something efficient, with better support. The arguments then also stated the speed difference wasn't huge. True, it wasn't, but later drivers improved on that. To sum up, most cards can overclock, so I may be able to take a low end card and push it up to a higher level, but that is not saying the higher level card can't go higher.

I've only encountered once, when I had a Ti4200, and a friend had a Ti4600. I could OC my card, and he couldn't, so our cards tied in performance. That was in 2003. I've not seen it before or after.
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