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[Official] AMD R9 280X / 280 & 270X / 270 Owners Club - Page 235

post #2341 of 9745
IIrc every asic score reported on the 280x here and elsewhere is 60-70. Mine is 68 and does not overclock well, I can only get to 1140 at 1.2v. Otoh these are 850mhz chips, so that's probably a good overclock lol.
Quote:
Originally Posted by Jaffi View Post

Do you think it is a good idea to lower the fan RPM a bit on the Gigabyte 280x rev 2? I am asking this because it can not read VRM temperature and I don't know how hot they get. The GPU itself is at max 75° C and fan @45-50%.
@stock it never gets hotter than 70° C but fans are at 65% which is too loud for my ears.
How would I recognize VRMs getting too hot? Would the card throttle down?

Does high fan rpm hurt vrm cooling? I've never heard that. On my Vapor X 280x higher fan rpm results in lower vrm temps.

Edit nm I forgot gigabyte is voltage locked. Have you called to make sure the card isn't supposed to have a vrm sensor? Maybe it's busted on yours.
Edited by taem - 12/12/13 at 12:46pm
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post #2342 of 9745
What does ASIC quality tell you anyway? Does a higher number mean better OC? Mine has an Asic quality of 74,7%.
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post #2343 of 9745
Mine has only 56.8% And it it does 1235/1825 @ 1.3v
post #2344 of 9745
That's a very high voltage for that speed; which is the trend ASIC quality sets.

High ASIC = less voltage for given clockspeed. Opposite for low ASIC.

DOES NOT imply overall max OC.
post #2345 of 9745
Quote:
Originally Posted by JoeDirt View Post

This Gigabyte 280x is a joke. Pull the cooler off and look at this 45° disaster. It's a damn mess under it. Heat pipes don't a cover a good portion of the GPU and are not in direct contact. It has a second plate of copper between the GPU and the heat pipes. Hottest running card I have ever had. I will not buy another AMD/Gigabyte product again if this is what they produce.

Hey JoeDirt, did you happen to take any pictures?

What's the problem with a copper heatplate?

When I installed my Rev2 Gigs last night one of the cards was bugged out and I realized it had been running at 99% utilization sitting on the desktop (according to MSI afterburner). Temperature on that card was 53*C and on the other card 40*C, though I keep an aggressive fan profile on in MSI afterburner so at 53*C it was about 65% fan (nothing can be louder than my H100i in "performance" mode)
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post #2346 of 9745
Quote:
Originally Posted by Derpinheimer View Post

That's a very high voltage for that speed; which is the trend ASIC quality sets.

High ASIC = less voltage for given clockspeed. Opposite for low ASIC.

DOES NOT imply overall max OC.

Well I'm a total novice at overclocking and that's what I hear. But what I find is that to raise clocks you need more voltage, which in turn raises temps. So in that sense ASIC sort of does imply a certain level of overclock ability. Because that's always my limiter, temps, I don't ever get to the point where I can determine max clocks because I shy away from the raised temps. I don't WC though.

Even if you WC or ln2 though, and can tolerate high voltages, high voltages wear out chips faster, with or without high temps. If you WC or ln2 you probably don't care since you're going to upgrade before any effects become evident. But for air cooled slow upgraders like me, I need to stress long term usage. I've had cards where I need to lower clocks to maintain stability two years into ownership.

In short, I want the highest ASIC possible. I'm so envious of the guys who get 110 rated cards, I always seem to end up in the 60s.

Here's a case in point, here are results for Metro LL bench, 20 loops, same settings except for voltage:

At 1.200v:



At 1.1193v:


And I ran the 1.200v bench early morning when ambient was much lower. Even a tiny bit of voltage makes a big difference.
Edited by taem - 12/12/13 at 1:05pm
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post #2347 of 9745
Not totally sure on longevity.

I think the reason people equate low ASIC -> watercool and high ASIC -> air is that a lot of people simply feel safer putting larger amounts of voltage in to a card when its on water.. So, low ASIC on water wont be limited. Low ASIC on air will be - psychologically.

I've had a very high ASIC card and found that it drew much more power, and ran much hotter than a lower ASIC card of the same exact model, at the same voltages. However, it took less voltage to be stable at a given clock. So the only real difference ended up being.. my card took less voltage, for the same net result. Power draw and temps were basically the same.

Maybe its not always that way? I dont know. No group of people have ever teamed up to solve the ASIC confusion once and for all. As far as I know, at least.

Of course, higher voltage always means more power draw on the same card. Its when comparing to others that its not so clear.
post #2348 of 9745
Quote:
Originally Posted by Archea47 View Post

Hey JoeDirt, did you happen to take any pictures?

What's the problem with a copper heatplate?

When I installed my Rev2 Gigs last night one of the cards was bugged out and I realized it had been running at 99% utilization sitting on the desktop (according to MSI afterburner). Temperature on that card was 53*C and on the other card 40*C, though I keep an aggressive fan profile on in MSI afterburner so at 53*C it was about 65% fan (nothing can be louder than my H100i in "performance" mode)

Sadly I didn't take any pictures. No problem with the pipes, it's how to GPU is at a 45° angle and not a 90° angle. So about 15-25% of the die is not in direct contact with the heat pipes. The TC was thick, hard and over applied. New paste got it down to low 70's instead of high 70's to low 80's. And this is with fans at 100% (The noise does not bother me) I also mine litecoin with this. To get to 700Kh/s you have to under clock it to 1020MHz. Anything over that and it will sit in the 400Kh/s range. This seems to be a big issue with a lot of these Gigabyte 280x's. Most other don't seem to have this problem. Maybe they just put a updated 7970 BIOS in them and said **** it? Maybe a BIOS update will be the solution but as of this time none of the ones released by Gigabyte have done any good. I will say the construction quality is A+ and it looks cool as hell. Going to end up getting a 780 Ti to game and water cool\OC
post #2349 of 9745
Why would the KH/s drop with higher clocks, I don't understand confused.gif
post #2350 of 9745
Quote:
Originally Posted by Jaffi View Post

Why would the KH/s drop with higher clocks, I don't understand confused.gif
No body knows yet. It just does. It also only works with intensity set to 13. Any others and the rate will sit around 20 KH/s. I'm going to see if I can flash another brands BIOS on it and see if that helps.
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