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ASUS hd 7950 direct cu ii overheating/faulty cooler - Page 4

post #31 of 38
Interesting thread; thanks to those who have participated.

Today I just bought one of these ASUS cards after reading a ton of reviews that say the card runs very cool and the fact I have an ASUS mobo. I bought it to replace a PowerColor HD 6850 that was running at 59C idle and up to 80C stock under load (now in my daughter's PC after a thorough clean out).

To my surprise when I fitted the HD 7950 today it was running at 59C idle(!!) and after a short (90 second benchmark) it peaked at 97C!!! This is a brand new card just purchased today!

So much for all the reviews saying it runs cool. mad.gif

Then I did a google search and found this thread (and a few others that said the same thing). I tested initially by re-running the benchmark at the same time as applying some upward pressure by my hand on the heat-sink assembly and my max temps were all of a sudden 20C lower. Then I tried tipping my case on its side so the heat sink is no longer hanging on the video card PCB and sure enough about 20C lower (still 70C+ though). Still trying further tests I turned my desktop case upside down (yep) and found that took another 10C off the max temp (see, now gravity is pushing the heat sink on to the card instead of trying to pull it off)... it seems that we are talking very fine margins here. Without good thermal contact the heat sink is unable to efficiently cool the GPU. (The other thing I noted is that the default fan curve is hopeless; 25% when the card is > 90C?? ***).

I next tried cutting a small section of broom handle (yeah, laugh if you want) and using that to prop up the card (let's face it, it's a big huge bugger) at the far end, and that brought max temps during the benchmark back to about 65C. I was all ready to hot glue a piece of fricken broom handle into my nice Corsair 600T case when I decided to do what others have mentioned (washers/spacers) so I looked around for some, but didn't really have anything handy. The best I could come up with at short notice was some cylindrical plastic wall plugs (dowels) that I cut 4x 1.5mm thick pieces off with a hacksaw, and fit those to the screws that hold the heat sink on to the card. I fit the "washers" between the screw head and the springs and now the screws can be tightened properly and properly hold the heatsink in position.

With these improvised washers in place and a slightly more sane/aggressive fan curve (using ASUS SPU Tweak) the card now peaks at 55C under full load! That's colder than when I first installed it at idle! thumb.gif

So I'll also put in my +1 for the washer trick. smile.gif

Next time I am at the hardware store I may look for some better washers or maybe the wall plug plastic will be good as-is (it's certainly a touch plastic and unlikely to melt since it has to handle the heat of drilling screws through it and that can get very hot).

Finally, I'll also agree with people who say that this isn't good enough and that the card should work off the bat without any need for screwing (pardon the pun) around like this. In Australia we are entitled to a full refund in this case (faulty goods), but I guess the gray area is proving the card is faulty. The way I see it most benchmarks (e.g., tomshardware) use rigs where the card is put in right way up, so the heat sink isn't hanging off the gpu and so it makes better thermal contact. ASUS could argue that the card orientation in your desktop case is the problem and that it's the case manufacturer's problem or the mainboard manufacturer's problem (although in this case it's also ASUS for the mainboard). (As an aside it seems like a dumb design having video card heat sinks suspended from the video card; surely having them sitting on top getting a helping hand from gravity would be better, but then maybe no one envisaged how big and bad ass these heat sink assemblies would become.) Shame on ASUS for still shipping a set of inadequate screws in any case. I bet there are people out there running their card at 90C (not crashing, yet) and none the wiser that their card is dying rather quickly. frown.gif

Even though I would have been able to return the card I just bought, I have just gone through a warranty claim with a brand new WD Black 4TB drive and didn't want to wait weeks to solve this. I just want the thing to work! The washer trick was something I could try relatively quickly and painlessly and it seems to work very well.

One final thing I will say is that if you read this and you do fit washers/spacers, only remove one screw at a time (and fit the washer and tighten it again) before removing another, that way you will not un-seat the heat sink. If you remove all screws and the heat sink becomes unseated then you have to re-seat it with new thermal paste etc. PITA time.

Edited by Abdul69 - 3/27/13 at 3:33am
post #32 of 38
Oh and by the way my card is a V2. Apparently the issue persists.
post #33 of 38
Originally Posted by Abdul69 View Post

Oh and by the way my card is a V2. Apparently the issue persists.

You're the first person having this issue with the V2 cooler.. so don't make such bold claims. It doesn't persist, you were just unlucky.

Take a photo of your card and upload here, I've heard of a few people ordering V2's and only getting V1's back.
post #34 of 38
Whoa settle down mate. I have a V2 card with the identical problem as described here with V1. I just connected the dots. Besides it's more a postulate than a claim.

FYI the code on the box/card says HD7950-DC2T-3GD5-V2

I assume V2 means V2 unless that is too bold a claim to make?
post #35 of 38
I'll throw this in too; my brother in law also just bought this exact card. A V2 also. I am in the process of checking with him whether he has a similar issue or not.

In the meantime, my main points were to thank people who participated in this thread and to confirm that the fix works.

Whether this is a continuing design fault in the V2 cards I do not really care to have that debate (that is not my purpose for posting), but the issue does sound exactly the same to me with the same fix and I can't see anywhere where ASUS actually acknowledged the fault, so what makes you so sure they fixed the fault that they didn't acknowledge in the V2 version?

As an aside, do you think it is possible that a V1 card has been placed in a V2 box with V2 labels added? The guy selling me the card said he didn't know much about ATI/AMD cards because he was an nVidia guy, but when he sold me the card he said something like "Oh this is a V2 too, if that means anything to you" and he literally circled in the label on the box where it indicated V2. Seems uncanny.
Edited by Abdul69 - 3/27/13 at 8:47am
post #36 of 38
Checked with my brother in law and his card is OK. Maybe I did get unlucky, but at the same time, I bet a lot of issues don't get reported, especially on this specific forum.


As an aside ASUS have done their best to make this series of cards quite confusing. The latest round of BIOS updates seems to have people scratching their heads as to which version is which. I am not going to touch that with a 4 foot pole until its sorted out.

For reference my card is most definitely:
HD7950-DC2T-3GD5-V2 where the T stands for TOP (meaning 900MHz core clock) and V2 means it's 1 x DisplayPort, 1x HDMI and 2 x DVI.

The other cards in the series appear to be:
HD7950-DC2-3GD5-V2 (800MHz, 1 x DisplayPort, 1x HDMI and 2 x DVI).
HD7950-DC2T-3GD5 (900 MHz, 2 x mini DisplayPort, 1 x HDMI, 1 x DVI).
HD7950-DC2-3GD5 (800 MHz, 2 x mini DisplayPort, 1 x HDMI, 1 x DVI).

The new BIOS posted for HD7950-DC2T-3GD5-V2 apparently (not tested myself) disables the second DVI port so people are thinking it's really the BIOS for the V1 card.

ASUS seems to have crappy software / software management for this card, which in my experience is in direct contrast to the Mobo support / software. ASUS GPU Tweak is no better than an early beta (crashes when you create or disable an eyefinity display group) and is about as user friendly as a pit bull, IMHO. So for now I am using MSI Afterburner (actually installed it on 4 systems now, 2 with ASUS cards, 1 XFX and 1 PowerColor; works great).

Also the ASUS driver for the card has problems for me (running 3 screens), so I am using the ATI/AMD 13.3 beta instead.

Given that MSI seem to take care/pride in their software I may look at MSI cards in future.

post #37 of 38
I agree about looking into other cards. I had high hopes about this asus card then had difficulty trying to OC it. My temps were not like the other negative reviews, they were quite good actually. Where I ran into a slew of problems was attempting to use MSI afterburner...

With my new setup im hoping to get it to 1200 on the core. I have that first one you listed "HD7950-DC2-3GD5-V2 (800MHz, 1 x DisplayPort, 1x HDMI and 2 x DVI)."
post #38 of 38
Interesting re the over-clocking experience. For now I am not actually trying to O/C my card (happy enough that I got it back to normal temps with factory clocks). For now I'm just using MSI Afterburner for fan control.
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