hd 6950 crazy temps ?

just started mining today ...(and yes i know dont start !!! but im still going to do it
i got two xfx hd6950's using phoenix or guiminer the temps are very hot 102c on one card and 92c on the other and im only getting about
240 mh/s out of them  most disappointing
catalyst 11.5 drivers
app sdk (stream sdk) 2.4
windows 7 x64

any ideas chaps ?!?! as i was looking to overclock and push these to the max...currently they suck ! lol  cheers  onis_uk

 

Hmm I dont know.. I've only been in the game for about a week.  I don't have AC in my house and hits hot here. but I still can keep them under 80 degrees fully overclocked usually.  I do have big fans on them though.  I use linuxcoin though.  Has everything you need for the linux noob to get up and running.  All can be run from a USB drive.

I have 8 visiontek 6950's

 

 

Yea, I have a HIS 6970 that runs @65C idle and jumps to 90C+ within 10 seconds of mining.
I believe it may have to do with poor thermal paste from the factory.
I'm going to scrape the junk off and apply some real arctic silver.
Maybe that will help.

While I'm not certain of your issues, I too have a pair of 6950's running, so maybe my setup will offer you some insight:

One card is current slotted in the top, the other card in the bottom slot, with an empty slot in between them for better airflow.  The bottom slot only offers PCIe x8, but this is perfectly fine for both mining and gaming.

Catalyst 11.1 drivers
Stream SDK 2.1
Win 7 64-bit

I'm using a PCI output fan directly above my top GFX card to pull heat out of the case and prevent heat exchange between the GFX and CPU.  Additionally I am using a AeroCool Shark 140mm case fan as an intake fan bringing in air directly onto the GFX cards from the side of my case, where there is about a foot of open space before a wall.  My case does have front intake fans and top output fans but they run at very low speeds and don't really effect GFX temps due to their positioning.

The room in which my PC runs is kept between 20-23C (68-73F) at all times.

I use the -f60 flag on both of my cards, giving them 98% utilization.

SPECS 1:  (Cool and Quiet)
Core Voltage 1049mV
Core Clock 830MHz
Mem Clock 650MHz
Fan Speed 53%
Top Card Temp Low 68C
Top Card Temp High 74C
Bottom Card Temp Low 74C
Bottom Card Temp High 80C
TOTAL 600Mhash/s


SPECS 2:  (Loud and Hot)
Core Voltage 1100mV
Core Clock 890MHz
Mem Clock 650MHz
Fan Speed 100%
Top Card Temp Low 73C
Top Card Temp High 79C
Bottom Card Temp Low 76C
Bottom Card Temp High 83C
TOTAL 660Mhash/s

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