Attention HD5970 owners

[washu9]

Is it possible that the ones that have the cold bug here are the ones who burn test their card before fitting the water cooling?

Did anyone who bought their second card because of the cold bug, burn test their card before fitting the waterblock? I'm suspecting that the 2nd one worked fine simply because you went water immediately, without burn testing it.

My theory is that the burn test heated the chips too fast, too hot, that it would simply break the internal connections when it does cool down. When it heats up again, it'd expand and reconnect. Thus you got connections that'd only connect on high temp.

Is this too far fetched?

[Church]

Imho yes, too far fetched. With all that megacomplex circuitry i'm guessing it would result rather in on/off working or not, with some basic inner hw or bios tests. I'm rather thinking that most probable is badly designed thermal monitoring (or power circuitry that might change depending on thermal readouts or something else depending on them like dynamic clocking/voltage) without taking into account possible lower temps with liquid cooling. And seeing it not fixed yet with bioses/drivers, probably it's hardware part, not software one. Maybe some new pcb revision might fix it?

[NaMcO]

In my case, got home today with a GIGABYTE version of the 5970 (ASUS was way more expensive - wonder why?), assembled the waterblock, booted the PC and instantly went into Crysis benchmark like i used to do with the XFX and by some miracle the bug is a goner. It went into the benchmark at 20º celsius, came out of it at 28º as it didn't even have time to heat up much and never crashed.

So long coldbug, but this is hardly the way to solve things as i "lost" 125 eur to "fix it". Nice going ATI... real nice going. Bah.

[japamd]

I've just mounted a Danger Den DD-5970 on my XFX 5970 Black Edition and the smaller CPL-2-50 chip didn't had any contact at all with waterblock:


I've applied THREE extra layers of thermal pad to make them have contact


The chips are at same level...

[menace2society]

Just ordered xfx black edition yesterday and now I'm hoping I won't be sorry. Is this happening on all the cards?

[jcool]

Nope, just a few it seems. Still, way too many to call this an "isolated issue"

[menace2society]

Nope, just a few it seems. Still, way too many to call this an "isolated issue"

I was so looking forward to this build now with this info I'm really confused with what to do. I would hate to buy a water block to use as a paperweight. Has any one tried this with any success?

[lowdog]

I was so looking forward to this build now with this info I'm really confused with what to do. I would hate to buy a water block to use as a paperweight. Has any one tried this with any success?

Sapphire 5970 purchased in November 09 and XFX 5970 BE purchased in March 10 both have the problem with an EK block on them but are fine with the stock cooler.

Sapphire overclocks like a wild thing with 1.15v volts and the XFX is a dud clocker requiring 1.2v just for 850 core....pos.

[menace2society]

Sorry about my other post yesterday I left out the link to the post I found here it is wondering if it might help. http://forums.amd.com/game/messagevi...hreadid=130657

[framesX2X]

hi

i hive 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 install the EK-FC5970 - waterblock , NO problem with the temp...http://www.performance-pcs.com/catal...db03201403e3f1

but my problem with card is that sometimes when playing BFC2 online after a good 1-1/2 hours my system just reboot. i ever had this problem before with GTX-285,
my PSU is ABS 1100W. I'm confused why this happen. other times i can play for 5 hours with problem at all and temp TOPs of 43c holding at fullload...
with AMD driver 10.4.

confused help.

thanks