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Belial's Comprehensive Guide to 7950s! - Page 4

post #31 of 311
Thread Starter 
Quote:
The first fan is dead on the sapphire actually, it was always a bit dodgy but it just stopped one day and it makes a horrible noise..
Supposedly it's the 1196-16-40G according to the box (I got it because I was told that it was a 7970PCB? (it's clearly not)

Sounds pretty clearly like a lubrication issue. You can read my guide here or ehume's guides on lubing fans:
http://www.overclock.net/t/1336160/how-to-repair-msi-twin-frozr-heatsink-fans-or-how-to-fix-fans-where-there-is-no-hole-behind-the-sticker

So sapphires used to use reference pcb. I suppose that's no surprise, the cheapo pcb came afterwards as a replacement.

7950 dropping in price to 300 is just natural... the 660TI or 670 hasn't been slashed in quality at all....
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post #32 of 311
Quote:
Originally Posted by Belial View Post

Sounds pretty clearly like a lubrication issue. You can read my guide here or ehume's guides on lubing fans:
http://www.overclock.net/t/1336160/how-to-repair-msi-twin-frozr-heatsink-fans-or-how-to-fix-fans-where-there-is-no-hole-behind-the-sticker

So sapphires used to use reference pcb. I suppose that's no surprise, the cheapo pcb came afterwards as a replacement.

7950 dropping in price to 300 is just natural... the 660TI or 670 hasn't been slashed in quality at all....

Yeah, obviously they've had to cheapen them out to fit the price margin!
I will re-lube it on the weekend and take some photos of the cards as I mentioned!
Cheers
+Rep

EDIT: Yes my sapphire is a 2L, same as this
Edited by Matt-Matt - 5/26/13 at 10:35pm
 
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post #33 of 311
@OP
So, which 7950s do you recommend then? thumb.gif
Pretty informative stuff there! thumb.gif
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post #34 of 311
Thread Starter 
The Sapphire 7950 Dual-X actually isn't too bad when you factor in price. It basically comes down to the following:

Sapphire: Better Cooler, Poor Build Quality
Gigabyte: Hynix RAM, Voltage Locked, Loud
TF3: Better build quality/aesthetics, worse cooler, Memory Voltage

For gaming I think the Sapphire Dual-X is one of the best cards to buy for value. Memory clocks don't matter much for gaming, and a quieter cooler is important.

But for GPGPU work, as I do, I regret it and wish I had gotten a card with Hynix and/or Memory Voltage control, as it turns out that for a certain popular GPGPU program, your memory overclock is actually much more important than your core overclock. You can still hit high marks with Elpidas with no memory control with the Sapphire Dual-X... just not the best. You might not mind loud coolers or weak coolers either if you are running on a test bench with a huge box fan on it anyways.

It all depends if you want to mod the card or not too, and what your usage is, ie gaming or 24/7 computational work.

Speaking for myself... I wish I had either bought an Asus DC2 V2 7950 off ebay used for ~$275 as they tend to go, for that 'perfect card', or, I wish I had bought a Gigabyte, not caring about the lack of voltage control since GPGPU work will overheat any 7950 on stock settings inside a case. Even better, an older gigabyte 7950 off ebay that still had voltage control, now that would be a true gem.

Frankly the smartest thing to do is just take off the shroud and fans of any 7950 and replace them with 2x120mm fans. All of them are horribly inadequate coolers when you get down to it, none of them will keep cool a 1.3v overvolt after 3 days of GPGPU work inside a case. But most people are either gaming which don't heat up cards, or running open air out of a case where they aren't going to overheat.
Edited by Belial - 5/26/13 at 11:18pm
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post #35 of 311
edit... already addressed:
http://www.overclock.net/t/1394623/belials-comprehensive-guide-to-7950s/20#post_20048294
Edited by ericeod - 5/26/13 at 11:41pm
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post #36 of 311
Quote:

thats cool smile.gif
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post #37 of 311
I have to disagree with the IceQ turbo's cooler being " weak". At 1050/1300 stock voltage it stays at 65c or below for me on any game I play. I can't say the same for benchmarks as I don't care about them, I care about "real world" performance. HIS base models on the other hand, I have bought bad & hot cards that died on less than a year without OCing. Also I'm not into gpgpu stuff, so whatever@whatever performance doesn't really matter to me either. There are more gamers who bought 7950s than you might think.
Edited by SulumorDNA - 5/27/13 at 12:01am
post #38 of 311
Quote:
Originally Posted by SulumorDNA View Post

I have to disagree with the IceQ turbo's cooler being " weak". At 1050/1300 stock voltage it stays at 65c or below for me on any game I play. I can't say the same for benchmarks as I don't care about them, I care about "real world" performance. HIS base models on the other hand, I have bought bad & hot cards that died on less than a year without OCing.

My DC2 TOP @ 1050/1750MHz (1.075V) stays at 56C in games and benchmarks (fan ramps up @ 36%)..


Yours ain't that bad but there are HD7950s with much better and more silent coolers.


CHEERS..
     
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post #39 of 311
My MSI twin froze at 1130/1510 1.163v stays around 65 ...
post #40 of 311
Ooh are we all chiming in with non comparable anecdotal evidence now?

My MSI TFIII @ 1320/1825 @ 1.213V hit 80C with the fan at 90% during a bench. I'll just conveniently leave out the ambient temps too. Hope this helps.
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