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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 348

post #3471 of 38704
does anyone know what thickness the thermal pads that come on the card are or what size i should use? im getting ready to open a 7970 up and replace the tim. while i have it opened, i want to put new thermal pads on as well. ive got 3 different sizes and want to make sure i put the right ones on.

thanks.
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post #3472 of 38704
Quote:
Originally Posted by Levesque View Post

ALL 7970s are locked to VID +0.125v MAX. If you use a higher voltage then this, it won't help you OC more. Even if you can raise your voltage over that limit, it's not doing anything... even if you think it is... wink.gif
We are waiting for utilities (if they ever do it, since RBE seems to be DOA...) to ''unlock'' that limit...

I'm almost tempted to do a hard mod, only downside besides being a hard mod is doing it three times lol.
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post #3473 of 38704
my MSI 7970 is installed, got beta afterburner setup and been running it at 1100/1500 right out of the box, not voltage changes. I ran it at 1125 for a couple hours then started artifacting so i backed it down a little.
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post #3474 of 38704
Quote:
Originally Posted by frick View Post

Based on what I've read in this thread so far, it sounds like the maximum voltage increment on any 7970 is +0.125 V. This means that if you have a card with a stock VID of 1.05V, the maximum voltage you can set in AfterBurner/TRIXX is 1.175V. This is also why people with stock 1.175 VID cards have more success overclocking past 1200 MHz, as they have access to voltages up to 1.3 V.
As far as I can tell, the only way around this limitation is to flash to the unlocked ASUS BIOS or the BIOS from some other card with a stock VID of 1.175. I've contemplated doing this myself with my 1.05V card, but I'd rather see someone else's results before I go risking a $550 card with a BIOS flash smile.gif

I've confirmed that flashing a different bios DOES NOT change your ASIC. It is read from hardware not software. The over voltage protection is in the hardware, and there is no software to bypass it right now, if ever. I had hopes that Baggz could figure a way thru bios to bypass OVP but he's given up on the project. We are screwed.
Quote:
Originally Posted by frick View Post

Using a program like HW Info, you can get a readout of the actual core voltage of a 7970. For me (1.05V stock voltage and 83% ASIC quality), regardless of whether I set the voltage in Afterburner to 1.175 or 1.3, it looks like the core voltage peaks around 1.18 (this is running loops of Crysis 2, which typically takes the GPU up to 98-99% usage). Additionally, at a core clock of 1200, I've noticed that setting the voltage to 1.175 is actually more stable (i.e., I never get a "black screen crash") than setting it to 1.2 or 1.225. Not sure if this is some sort of overcurrent protection built into the card (or whether it can be bypassed with a BIOS flash), but it seems like people with stock VIDs of 1.175 have fewer problems overvolting past 1.2V and thus are able to attain core clocks of 1250+ more easily.

HWmonitor does not read real, actual voltage. It only displays intended voltage. Any fluctuation is from the different powerplay states, and/or fluctuactions from your PSU. Use gpuz to read actual voltage.
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post #3475 of 38704
How could you see VRM temperature again? I know there was one program that could on these cards at the moment.
post #3476 of 38704
Quote:
Originally Posted by Norlig View Post

How could you see VRM temperature again? I know there was one program that could on these cards at the moment.

Pretty sure Gpu-Z shows mem and vrm temps.
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post #3477 of 38704
Quote:
Originally Posted by evensen007 View Post

Pretty sure Gpu-Z shows mem and vrm temps.

not on 7000 series
post #3478 of 38704
I think it was HW beta... I had it on my pc for a minute and it definitely worked. thumb.gif
    
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post #3479 of 38704
Quote:
Originally Posted by Norlig View Post

not on 7000 series

It's better for voltages. ALso, previously it only read temp from the volterra chip not real vrm temp iirc.

In gpuz:

VDDC = gpu voltage
MVDDC = memory voltage

VDDC current in/out relates to well the vrm operation but I dunno checking vrm temp other than use a thermo gun.
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post #3480 of 38704
Quote:
Originally Posted by tsm106 View Post

It's better for voltages. ALso, previously it only read temp from the volterra chip not real vrm temp iirc.
In gpuz:
VDDC = gpu voltage
MVDDC = memory voltage
VDDC current in/out relates to well the vrm operation but I dunno checking vrm temp other than use a thermo gun.

before my 580's (before these 2), I could meassure the VRM temp on my 5970 with GPU-Z. I also read in this thread that you can meassure it on the 7000 series on your computer, just not with GPU-Z.
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