Overclock.net › Forums › Graphics Cards › AMD/ATI › ATI Cooling › Artic Accelero 7970 cooler and msi Lightning 7970 with msi heatspreader; not sure if doing it wrong
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Artic Accelero 7970 cooler and msi Lightning 7970 with msi heatspreader; not sure if doing it wrong

post #1 of 9
Thread Starter 
I've seen others with this cooler, and the guides as well, where they take off the black heatspreader on them and use thermal glue provided to attach the heatsinks to the VRM and video RAM.

Well, after removing the msi lightning cooler, and looking at it and the artic one, they looked so similar I figured that if that heat spreader helps cool the VRM fine with the stock cooler, then it should with the artic one.

So all I did is take off the fan, clean the old thermal grease off, and attached the cooler without the backplate but used the spacers.
The msi lightning doesn't have a back plate, and its cooler was only slightly lighter and screwed right on. (The GPU Reactor module gets in the way of any back plate. It is removable, but why do so when it seems I wouldn't need to?)

The artic cooler fans sit around 10mm higher than the msi ones did off the heat spreader and that's the only possible issue I saw.

So, I didn't follow instructions at all but it looks nicer this way and may actually cool better this way.


Running furmark for half an hour now, temps are stable at:
53c GPU, 64c video RAM, 73C VRM.

It's overclocked at 1295mhz@1325mV, with memory at 1400mhz@1649mV, and +20Aux mV.

Fan is the quietest one in my case at those temps. And those temps for VRM and video RAM are lower than ones I've seen in other Artic Accelero tests that aren't OC'd as much.

448
is what it looks like when you put the supplied heat sinks on the bare card. (Neither of these are my images)

1679838.jpg
Shows the black metal heat spreader which I left on, but I haven't attached heat sinks to it.

Might not be the worst idea to attach the heatsinks to the heat spreader as well, but I doubt it matters much.
Edited by innociv - 6/22/12 at 4:07am
post #2 of 9
Looks better then my last attempt smile.gif

My card got all sorts of messed up last time frown.gif
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post #3 of 9
edit: reread the OP & realized my comment was useless.
    
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post #4 of 9
Thread Starter 
After running it for a long time the VRM does creep up to 80C. (edit: just realized I had the fan on auto. Apparently auto thinks 80C VRAM is okay. Sticking it on 80% put it back down, but I'm still thinking I should apply the heatsinks to the spreader)
That black heat spreader gets quiet hot to the touch(even on the back side.)

Maybe I should apply the heat sinks to the black heat spreader.
Either way, shouldn't that be better than just the heat sinks directly on the VRMs? After all, the big heat spreader is spreading the heat all over the card, and gives a lot of surface area to pull heat from. I would think the heat spreader+heat sinks may improve it a bit.

I'll have to get some artic silver to reapply the cooler to the gpu I guess..
Edited by innociv - 6/22/12 at 4:08am
post #5 of 9
Quote:
Originally Posted by innociv View Post

After running it for a long time the VRM does creep up to 80C. (edit: just realized I had the fan on auto. Apparently auto thinks 80C VRAM is okay. Sticking it on 80% put it back down, but I'm still thinking I should apply the heatsinks to the spreader)
That black heat spreader gets quiet hot to the touch(even on the back side.)
Maybe I should apply the heat sinks to the black heat spreader.
Either way, shouldn't that be better than just the heat sinks directly on the VRMs? After all, the big heat spreader is spreading the heat all over the card, and gives a lot of surface area to pull heat from. I would think the heat spreader+heat sinks may improve it a bit.
I'll have to get some artic silver to reapply the cooler to the gpu I guess..

I do not own this card so take my advice with a grain of salt...(I have installed an arctic gpu cooler on a 6950 though)

You installed the cooler the exact way I would have. Just in general if a card has stock memory cooling or vrm cooling installed I personally would not take it off, just install the new heatsink as you did.

I think the problem here is the fans on the stock heatsink probably ran at 3000-3500rpm during a high load while the arctic is probably running at around 1200-1500. So the stock fans were pushing way more air over the black heatspreader and all the components below it. I would just manually turn up the fan speed on the arctic and keep the temps in check that way (it will still be much quieter than stock). If that does not work well enough try to have a case fan in the side of the case blow air on to it.

I do not think that attaching the included heatsinks to the black heatspreader will help much if at all and I'm not even sure how well they would stick to it. It functions in spreading the heat out and then getting rid of it so attaching heatsinks to draw the heat to a smaller area just sounds counter intuitive to me...

I personally would not take off the original black heatspreader if you ever intend on the selling the card in the future unless it begins to overheat. The way it stands now you can easily replace the stock heatsink and sell it or rma it with nobody ever knowing. Also if you do take off the heatspreader and use the included thermal glue to attach all those heatsinks I have read it can be a pain to remove them (I know alot of people recommend using thermal tape for this very reason instead of the included glue you mix together).
post #6 of 9
Thread Starter 
Thanks. I thought it was odd that I didn't find others doing the same with this same cooler. This both was easier, looks better, and possibly cools just as good if not better.

The thermal compound included actually sets to be like thermal tape, not thermal glue, so it's easy to remove.

The only way to get VRM temps past 75C with 80% fan(which is extremely quiet on this cooler) is if I overclock, so this seems fine.

In normal gaming, like just playing Dota2, the VRM temps don't go above 45C and the gpu 35C.
post #7 of 9
Is it possible to instal Accelero with heatsinks that are on stock Sapphire 7970?
Edited by Denca - 8/7/12 at 11:22am
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post #8 of 9
Thread Starter 
It should work for all of them.

There is a pdf on the artic website that shows the exact dimensions.

All the 7970 have the 45 degree rotated gpu, afaik.
post #9 of 9
+1 on doing it as I would do it

being able to use aftermarket heatsink for the core and keeping the heatspreaded for the rams and vrm is one of the reason why I am thinking of getting the lightning be instead of my recently bought Gigabyte 797TO which runs too hot (even repasted and reseated) that it downclocks itself to 1050

also I like the unlocked voltage and temp sensors compared to cheaply built reference pcb based 7970s

nice to find a thread with similar setup, temps look great imho for that voltage, much better than what any other out of the box 7970 cooling will get you

I have a vf3000a which I might be able to fit (it is very close to accelero extreme), or I could get the accelero if I can't (the zalman has kinda fixed height and read the 7970 has lower core and would need a copper shim, the accelero has just long screws so it doesn't have this possible issue the zalman has)
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