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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1479

post #14781 of 38704
Quote:
Originally Posted by AllGamer View Post

Hey I just noticed 12.8 drivers are available for download
seems like they skipped the whole 12.7 and jumped from 12.6 official to 12.8 official
has anyone try them yet?
--- EDIT ----
never mind, i just read the messages above tongue.gif

 

12.8 are junk. most of my friends who switched to 12.8 are experiencing, Black screens or artifacts with there cards that they never had before. Going back to 12.6 fixed the new issues

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post #14782 of 38704
Quote:
Originally Posted by Imprezzion View Post

Lol. I just tried my VRM temps again as well after they overheated during a few hot ambient days here.
For the ones that didn't read that: Using a reference 7970 with a Accelero 7970 - fan module and with 2 Slipstream 1600RPM fans tied to it.
VRM sinks of Arctic are just way too small, and the thermal tape self-mix goo is rather bad as well. With a voltage of 1.243v and 1230Mhz core, 1.625v VRAM and 1700Mhz VRAM I hit well over 100c in BF3.
Also, Heaven 3.0 on all max could pull it pretty high, but not as high as BF3. Current load was about 140-160 amps in BF3 max.
Tried them at those clocks again now that ambients are back to 20~ish deg. celsius. Roomtemp was like, 21c now.
Ran Heaven, somehow VRM's stayed REAL cool, only 66c for VRM1 and 54c for VRM2 in GPU-Z. Current draw was pretty low, only averaging about 124 amps.
So, I decided to REALLY test them with something that pulls EVEN MORE amps and load then Furmark does. OCCT.
That managed to pull a figure well over 200 amps quite easily with the average current being about 223 amps. (VDrop was quite extreme, it did artifact lightly due to it)
Well, that load on the VRM's caused VRM2 to behave very normally and slowly go up to about 65c and staying there, but VRM1 just SHOT up like a rocket and within 60 seconds it had reached 105c and seemed to stabilize there but no, every 5 seconds it would climb a degree and every 4-5 degrees VDrop increased till the point OCCT just died with the VRM1 temp at about 128-130c.
So, This Arctic heatsink is VERY good in terms of core temps, only 65c even with 200+ amps (240-260w) on it, but the VRM sinks are severely worthless. I'm going to find a way to cool them better.

I'm having something close to the same problem. My VRM 1 hits around 102C during BF3, but VRM2 never tops 30C. Any ideas on why that is??
post #14783 of 38704
Quote:
Originally Posted by MACH1NE View Post

hey guys is there any way to go above the 1.3v limit on msi afterburner?

Not AB, just trixx.
post #14784 of 38704
Quote:
Originally Posted by Macke93 View Post

I would really appriciate that! biggrin.gif I haven't crossfire any setup before, so I thought it sound like a smart idea to mix two great cards!
I'll wait for the results, thanks in advance smilingsmiley.gif

I would just recommend getting the same one though. The 7970 will be crippled to 7950 performance if you decide to match it with a 7950. Lots of people have been doing this since the 4K series and it really benefits you more to get matching cards unless you can somehow get them for super cheap.
    
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post #14785 of 38704
Quote:
Originally Posted by Kokin View Post

I would just recommend getting the same one though. The 7970 will be crippled to 7950 performance if you decide to match it with a 7950. Lots of people have been doing this since the 4K series and it really benefits you more to get matching cards unless you can somehow get them for super cheap.

It's not "crippled" since the 5xxx series, but I actually did this with my 6870 and 6850 and It wasn't good.. It's better to have matching cards preferably identical smile.gif
 
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post #14786 of 38704
Quote:
Originally Posted by Matt-Matt View Post

It's not "crippled" since the 5xxx series, but I actually did this with my 6870 and 6850 and It wasn't good.. It's better to have matching cards preferably identical smile.gif

So the higher card won't run at a lower % compared to the lower card? I'm assuming you faced microstutter issues with the mismatching cards or did CF not work well at all?
    
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post #14787 of 38704
Quote:
Originally Posted by Kokin View Post

So the higher card won't run at a lower % compared to the lower card? I'm assuming you faced microstutter issues with the mismatching cards or did CF not work well at all?

It was about the same, it's just a waste of the better card because it was always sitting at 85-90% and the other was sitting at 99% (something along those lines). The memory was faster on the 6850 and the core was faster on the 6870..

The top card was a 6870 Hawk and it heated up alot.. 100c in some cases! rolleyes.gif
 
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post #14788 of 38704
Quote:
Originally Posted by Matt-Matt View Post

It was about the same, it's just a waste of the better card because it was always sitting at 85-90% and the other was sitting at 99% (something along those lines). The memory was faster on the 6850 and the core was faster on the 6870..
The top card was a 6870 Hawk and it heated up alot.. 100c in some cases! rolleyes.gif

That was what I was talking about with the faster card being crippled as it has to run at a lower % when the slower card runs at a higher % (maxed in your case).

The 6870 and 6850 we're totally different cards though and aren't like the 6950/6970 or 7950/7950. The 6870 was based on a heavily disabled 6950/6970 PCB (hence the need for two 6pins) while the 6850 had a more mid-range quality PCB that was much shorter and only needed one 6pin. Later revisions may have changed that though.
    
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post #14789 of 38704
Quote:
Originally Posted by Kokin View Post

Quote:
Originally Posted by Matt-Matt View Post

It was about the same, it's just a waste of the better card because it was always sitting at 85-90% and the other was sitting at 99% (something along those lines). The memory was faster on the 6850 and the core was faster on the 6870..
The top card was a 6870 Hawk and it heated up alot.. 100c in some cases! rolleyes.gif

That was what I was talking about with the faster card being crippled as it has to run at a lower % when the slower card runs at a higher % (maxed in your case).

The 6870 and 6850 we're totally different cards though and aren't like the 6950/6970 or 7950/7950. The 6870 was based on a heavily disabled 6950/6970 PCB (hence the need for two 6pins) while the 6850 had a more mid-range quality PCB that was much shorter and only needed one 6pin. Later revisions may have changed that though.

6870 and 6850 were both very similar cards. The 6950 and 6970 were also very similar. No, the 6870 wasn't closer to the 6950 in terms of architecture, it was closer to the 6850, which is why you can't crossfire a 6950 with a 6870, but you can a 6870 with a 6850.
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post #14790 of 38704
The reference 6870 had a much better pcb that was closer to the 6900 in design, but the chip was pretty much the same as the 6850. Of course the reference 6850 never went on sale.
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