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ProfileArif Mert Kapicioglu

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Message 45323 - Posted: 26 Dec 2010, 20:38:51 UTC - in response to Message 45322.  

Keep an eye on VRM temperatures, they often get missed/forgotten about in the concern over Core temperature. Its the VRMs that cause 5970s incorrectly handled to burn out, as there is a very wide difference between core temps and VRM temperatures on a 5970. The 5970s have an inherent design issue that causes this, but does bare watching for in a 6970 (and upcoming 6990) until it becomes clear what the situation with the new design is.

I have no idea what the VRM temp way points are for a 6970, but for a 5970 they are:

Up to 100 degrees - ideal, usually core temps are around 75-80
Up to 110 degrees - tolerable, will be fine, watch for increases, core temps usually around 85-90
Up to 115 degrees - pushing your luck, need to back off, core temps usually 90+
115-120 degree - card life will drastically reduce, must cool further
120+ - card devolts, will burn out fairly quickly if run 7x24 at these temps

GPU-Z is a good one to use to monitor VRMs as well as core temps

Regards
Zy

The current GPU-Z doesn't show VRM temps. Therefore, the other variables are my only guide here:(. The question is that will it be possible to run 4x6970 with stock speeds of 880? Well, you will definitely need a cool room for that and considering these temps, i dont think a room temperature will be enough. Does anyone have any heat issues with 6970 crossfire?
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Zydor
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Message 45324 - Posted: 26 Dec 2010, 23:55:58 UTC - in response to Message 45323.  
Last modified: 27 Dec 2010, 0:35:37 UTC

.... The current GPU-Z doesn't show VRM temps.....


Yes it does - thats what the VDDC readings are. It maybe that it does not yet recognise 69xx - but VRM temps are a core function so doubt it will be long before it does for 69xx.

EDIT: Had a ferret over at GPU-Z, there is a hot-fix to add 6950 & 6970 support, came out 11 Dec and will be added formally on next release.

GPU-Z 6950 & 6970 Support - New exe file download

Regards
Zy
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ProfileArif Mert Kapicioglu

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Message 45332 - Posted: 27 Dec 2010, 15:02:03 UTC - in response to Message 45324.  

.... The current GPU-Z doesn't show VRM temps.....


Yes it does - thats what the VDDC readings are. It maybe that it does not yet recognise 69xx - but VRM temps are a core function so doubt it will be long before it does for 69xx.

EDIT: Had a ferret over at GPU-Z, there is a hot-fix to add 6950 & 6970 support, came out 11 Dec and will be added formally on next release.

GPU-Z 6950 & 6970 Support - New exe file download

Regards
Zy


Thanks mate. Here is the temps on 2x6970 crossfired at a constant room temperature of 25C running at 950 core & +20 power tune on both cores. The 1st gpu core=72C, VRM=80C. 2nd gpu core=64C,VRM=77C.
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Mogdy

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Message 45349 - Posted: 28 Dec 2010, 1:21:44 UTC - in response to Message 45332.  

.... The current GPU-Z doesn't show VRM temps.....


Yes it does - thats what the VDDC readings are. It maybe that it does not yet recognise 69xx - but VRM temps are a core function so doubt it will be long before it does for 69xx.

EDIT: Had a ferret over at GPU-Z, there is a hot-fix to add 6950 & 6970 support, came out 11 Dec and will be added formally on next release.

GPU-Z 6950 & 6970 Support - New exe file download

Regards
Zy


Thanks mate. Here is the temps on 2x6970 crossfired at a constant room temperature of 25C running at 950 core & +20 power tune on both cores. The 1st gpu core=72C, VRM=80C. 2nd gpu core=64C,VRM=77C.


i am unable to read vrm temp with gpu-z
how are you doing ?
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Profile[SETI.USA]Tank_Master

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Message 45350 - Posted: 28 Dec 2010, 7:08:45 UTC
Last modified: 28 Dec 2010, 7:09:04 UTC

i can read the voltage, but not the temp for that.
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ProfileArif Mert Kapicioglu

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Message 45352 - Posted: 28 Dec 2010, 15:22:36 UTC

Further details, if you let the power tune at 0, you can reduce the memory clock to 800, if you raise it to +%20, you can lower it to 850 (using MSI Beta 5). It will save you hell of heat.
I think i might make a mistake. I used GPU-Z 0.50 and those temps belonged to GPU temp #3. I guess it is the VRM? Maybe i'm wrong.
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ExtraTerrestrial Apes
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Message 45574 - Posted: 15 Jan 2011, 12:46:22 UTC

Things are looking really good for the HD6950. There's an Asus BIOS out there which unlocks the shaders but leaves clocks and voltages at stock HD6950 levels - more secure and you don't loose power efficiency as with a full HD6970 bios.

And using ATI Tray Tools 1.7.9.xxxx beta you can set the clocks just as you want them to. There's no Overdrive limit bullsh*t in there. Using this I lowered the memory down to 625 MHz (50%) and saw no performance impact but substantial power savings.

And with MSI Afterburner 2.1.0. beta 6 (I think.. the current one) you can set voltages in software - yeha! My HD6950 is perfectly fine at 800 MHz with 1.00 V instead of 1.10 V (stock).

MrS
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