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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1303

post #13021 of 38701
Mind if I join? I got a Gigabyte Windforce 3x 7950 a few months back, serves me very well.

On the subject, how would ya'all suggest I go about overclocking? My friend did it in AMD overdrive by just sliding up the boost speed and voltage a bit, but I wonder if there are better/more stable ways.
post #13022 of 38701
Quote:
Originally Posted by flopper View Post

How does one card do?
If one card do well we can suspect some pci bridge communication or incompability somewhere.
However, since bsod happens, I suggest try one card, run test and game, and then shift to the other and try it the same.
(pain to do but)
if both cards work then there is a compability thing somewhere. (my best guess)

I think it might be game related instead.

SKyrim - works perfect averaging mid to high 50's using Crossfire
Mass Effect 3 - works perfect averaging mid to high 50's also. - Crossfire
Both games maxed settings and 2560xRes.

BF3 - now i am guessing this is due to the basic installation of the game from DVD's - no updates whatsoever from the net since i dont have this machine connected to internet as such and i am thinking the game was perhaps that buggy that SLI / crossfire never worked correctly with the installation from the DVD. perhaps updating it through the net might resolve my issues since i highly doubt its my cards - otherwise why would all games work except BF3 !!!??

I managed to get MSI going in a BF3 campaign game and frames sitting at mid to high 40's. during game went to display settings (already set on ultra, changed it to custom) bang! up it went to 70's and then hardlock!

I noticed from the MSI readings that it was only using GPU 1 and 2nd GPU sitting at idle 150 Mhz but once i made that display setting change i did notice a quick spike in GPU 2 before the hard lock. It seems the basic installation of BF3 doesn't have the necessary stuff for crossfire - at least i hope not otherwise my idea goes out the window and there may indeed be something wrong with the card's / drivers...

But am ruling out the cards and drivers since everything else seems to work fine except BF3... would you all agree that BF3 is just a piece of !@#$%@#!%)(&!#% programming??
however Heaven3.0 benchmark still does crash...........hmmmm
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post #13023 of 38701
Anyone have stuttering in spec ops the line?
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post #13024 of 38701
more than likely a driver problem
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post #13025 of 38701
Quote:
Originally Posted by Tomha View Post

Mind if I join? I got a Gigabyte Windforce 3x 7950 a few months back, serves me very well.
On the subject, how would ya'all suggest I go about overclocking? My friend did it in AMD overdrive by just sliding up the boost speed and voltage a bit, but I wonder if there are better/more stable ways.

You can probably take your card straight to 1050/1450 without a voltage boost. From there, bump the clocks a bit, and check stability. If unstable, bump the voltage up a bit. Keep doing this until your card reaches its thermal limit (should try to keep it below 80ºC), or you can no longer get a higher clock speed with stability.

Nobody can tell you how high your card will go until you try it yourself. Once you start overclocking a bit and learn, it becomes a lot of fun to try and eek out that extra little bit in benchmarks. Don't be too worried about blowing anything up, as long as you watch temperatures and overclock in gradual steps, you won't damage anything.
 
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post #13026 of 38701
broke a capacitor off of my 7970 frown.gif
it says
ULR
16V
270
AL

its from a diamond reference

i can get the soldering done, but the capacitor is broken, any help finding a replacement?
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post #13027 of 38701
Quote:
Originally Posted by phillyd View Post

broke a capacitor off of my 7970 frown.gif
it says
ULR
16V
270
AL
its from a diamond reference
i can get the soldering done, but the capacitor is broken, any help finding a replacement?


You can use anything that's same or higher voltage, ulr, and same or higher capacitance. There's a decent selection at digikey. I think you want to look at the alu radial caps.

http://www.digikey.com/scripts/dksearch/dksus.dll


I did a quick search for you, btw I'm guessing its one of the surface mount caps right?

64
Edited by tsm106 - 7/8/12 at 10:21pm
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post #13028 of 38701
Quote:
Originally Posted by tsm106 View Post



You can use anything that's same or higher voltage, ulr, and same or higher capacitance. There's a decent selection at digikey. I think you want to look at the alu radial caps.

http://www.digikey.com/scripts/dksearch/dksus.dll


I did a quick search for you, btw I'm guessing its one of the surface mount caps right?

64
yes it is
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post #13029 of 38701
Quote:
Originally Posted by Wattser93 View Post

You can probably take your card straight to 1050/1450 without a voltage boost. From there, bump the clocks a bit, and check stability. If unstable, bump the voltage up a bit. Keep doing this until your card reaches its thermal limit (should try to keep it below 80ºC), or you can no longer get a higher clock speed with stability.
Nobody can tell you how high your card will go until you try it yourself. Once you start overclocking a bit and learn, it becomes a lot of fun to try and eek out that extra little bit in benchmarks. Don't be too worried about blowing anything up, as long as you watch temperatures and overclock in gradual steps, you won't damage anything.

Thanks for the advice, just a few questions:

1) Is this all using AMD overdrive, or do you suggest I do it through BIOS or something?
2) How would I check stability? What programs would you suggest I use to check stability (and benchmark) and what do I look for?
3) I just want to check, with the cards defaults being 900/1250, going straight to 1050/1450 isn't too fast? The max allowed in overdrive are 1100/1575
4) What is counted as a small (and safe) voltage bump? In AMD overdrive, its measured in %, e.g. +20% max, so what would I do to bump it if it wasn't stable? The same applies to clock speeds, I hear you want to go about 50mhz at a time, is this true?
Edited by Tomha - 7/8/12 at 10:57pm
post #13030 of 38701
hi all,

wondering if someone can tell me, good bad ugly?

http://3dmark.com/3dm11/3843336

dont understand why core and mem clocks sitting at idle values!!!

anyone have any clue?

I've just installed the free version from net, cant change any settings at all.
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