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6850 xfire advice! - Page 2

post #11 of 18
Yup 550W is plenty of power for dual 6850's. They consume about 120W peak at stock. My brother is running an overclocked 4850 (very similar power consumption) on a 300W power supply and has no issues just as a reference.
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post #12 of 18
Thread Starter 
Man that's hardcore. I will try them as they are and monitor temps and see how they go.
I have 2 MSI twin frozr 560ti's in my other rig and those things never break 65C! Amazing cooling.

How is the Sapphire overclocking utility? Does it measure temps and all that good stuff like MSI's afterburner?
post #13 of 18
Thread Starter 
Thanks for the reference iinversion!
post #14 of 18
Quote:
Originally Posted by j4m3550n View Post

How is the Sapphire overclocking utility? Does it measure temps and all that good stuff like MSI's afterburner?

It's good. I use both actually (amazed they don't fight each other). I can't live without the AB OSD, but I like the Trixx sidebar widget. Trixx is still very new and has improved rapidly since its release.
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post #15 of 18
I understand that this post is almost a week old, but I didn't see fit to make a new one.

How much more power do the 6870's use in XFire? I have a OCZ 700 watt unit, I was wondering if it was enough or not?

Also, is it possible to unlock 6850's to 6870's?

Thanks in advance wink.gif
 
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post #16 of 18
Quote:
Originally Posted by Warweo View Post

I understand that this post is almost a week old, but I didn't see fit to make a new one.
How much more power do the 6870's use in XFire? I have a OCZ 700 watt unit, I was wondering if it was enough or not?
Also, is it possible to unlock 6850's to 6870's?
Thanks in advance wink.gif

Yes, 700watts for two 6870s is more than enough. I have my 6950s overclocked to 6970 speeds (along with my overclocked 955) running on my 650 watt corsair I never seen the power usage go over 561 watts. Your system should run no more than 500 watts, even with that 2500k overclocked. Also, I have never hear of unlocking 6850s but youd have to ask someone else about that. Hope this helps thumb.gif
Quote:
Our test system is based on a power hungry Core i7 965 / X58 based. This setup is overclocked to 3.75 GHz. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). Power draw for the entire system at full load was 421 watts.

http://www.guru3d.com/article/radeon-hd-6850-6870-crossfirex-review/4
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post #17 of 18
that ocz will be more than enough for 6870 CF. No you can't unlock a 6850 to 6870. Max TDP for 6870 is around 150.
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post #18 of 18
Thanks for the advice. I'll have a goolge about the unlocking, I'm very new to AMD cards. The only reason I've jumped ship is because I found the 6850's for so cheap biggrin.gif It's not often you find GTX580 performance for £160...
Quote:
that ocz will be more than enough for 6870 CF. No you can't unlock a 6850 to 6870. Max TDP for 6870 is around 150.
Ah, thanks for clarifying the unlocking. I must have missed your post after I posted mine. thumb.gif
Edited by Warweo - 3/1/12 at 2:31pm
 
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