after talking to sapphire support what i learn, ATI 5970 cards

[framesX2X]

SAPPHIRE 100280SR Radeon HD 5970 (Hemlock) 2GB 512 (256 x 2)-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
I have been reading a lot about this and its performance THE 5970 AMD VIDEO CARDS, one thing, it gets very hot at times" NOT GPU's guys", The GPU TEMPS GO AS HIGHEST 63C at full load, clock at 850/1040 1.1v and the fan running at 100%.
it's the memory " GDDR5" that hits about a good 80c at full load, and the back plate is very hot. I know it sound crazy, but I did some test on this card.
I put temp senor on the memory and senor on the GPU the reading I got was " GPU top 64c full load" and the memory temps was read 75c to 88c on both side of the card.
what I think it's the memory that coursing the cold boot or overheating, I ran a benchmark on this card, when temp on the memory got to 82c the card shutdown the system and reboot it sift.
but the GPU temp was holding at 60c to 63c. it sound funny. right? / other user are reporting the same problem with all the ATI-5970 cards...
Even if you install a water block, the problem will still be the back plate, someone need to make a "WATERBLOCK BACK PLATE".
I did a temp test on the memory with a waterblock install. this is what I got with the block install.
at full load temp reading on GPU's was 63c and the on the GPU's side the memory also reading 40c. but the memory on back plate was reading higher them memory on the GPU's side, it was reading temp at 68c to 81c and still right after the benchmark fished, the card did cold boot, guys it not cold boot..THE MEMORY ARE OVER HEATING, THE BIOS IS PROGRAM COUSING THE SHUTDOWN, WHEN THE MEMORY TEMP GET TO HIGHER THEN 80c IT WILL SHUTDOWN OR MAKE YOUR SYSTEM REBOOT.

[zanzabar]

i would bet that if u send gabe a pm he may get a swiftech fined unisink out for the back. dose it get those temps if u dont oc the ram.

[framesX2X]

overclock or not, you still get these temp, at 725 the memory still gets very hot 74c to 79c, but it wouldn't reboot the card...

[framesX2X]

hi

I found a problem with ATI-5970 hemlock video card. the cold boot is not cause by the GPU's benign overclock, but by memory of graphics card the "GDDR5", It does not matter if you overclock the memory or not. When I apply Cold air from the bottom of the card,
the memory on that side cool down to 36c. if no air gets to top of the back plate the temp on that side is 44c. if overclock the memory, Let's say 1200mhz then the temp jump up to 67c to 78 on the back plate. So in this test I put a AC duck to the card, blowing cold air to the intake of fan.

I think that manufacture are aware of this problem, another words if you try to RMA your 5970 card because of a cold boot, they will decline you RMA. And they will tell you that the problem is not the card, but PSU or Drivers .


This benchmark results.... Now remember I did over clock when I ran the benchmark.
890mhz @ 1.16v @ 1200mhz mem and Synchronize both GPU's.
3Dmark06 / 25117 score
http://i955.photobucket.com/albums/a.../test2pics.jpg
some pics on what I did to cool down the memory.

[wez]

Well, having good air flow for the card is a must, and nothing new. Pretty much a no-brainer on such a powerful card. Especially if you got water on all other components.

[Levell0rd]

Did you read the post? He says the card is too cold to boot. Not too hot, meaning you need more airflow.

[wez]

Did you read the post? He says the card is too cold to boot. Not too hot, meaning you need more airflow.

Hmm?

I'm aware that some users are experiencing cold bug issues. But I see nothing mentioned in this thread that would bring more light to that issue. All I see is he saying the ram is getting overheated.

THE MEMORY ARE OVER HEATING, THE BIOS IS PROGRAM COUSING THE SHUTDOWN, WHEN THE MEMORY TEMP GET TO HIGHER THEN 80c IT WILL SHUTDOWN OR MAKE YOUR SYSTEM REBOOT

So, perhaps try reading it yourself? And sorry, I do not understand your last sentence, Levell0rd.

Or am I missing something here, that you are aware of?

[mbreslin]

Did you read the post? He says the card is too cold to boot. Not too hot, meaning you need more airflow.

Congratulations, most confusing sentence ever.

The cold/warm bug seems to be dependant on core temp, I'm sure memory temp could have something to do with it. It doesn't matter imo, it's too hard to try and keep 1 component above the cold/warm bug temp. Memory/vrm/core whatever, other than on running on air or turning off pump, not much can be done.

[framesX2X]

hi guys

I'm sorry for miss type., i correct the post.