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Discussion Starter · #1 ·
Hi, I've got my R9 290 in the mail the other day, and am eager to put it under water - currently my 7950 is hooked up to the system, but not powered.

I just need some help in picking a heatsink for the VRM. For memory I have some generic aluminum heatsinks, but I feel like those wont be sufficient for the VRM. For the 7950, it was not a reference card.. so it had a separate VRM heatsink that I cant use on this card.

Is there any sort of quality VRM heatsink out there, or are those only sold with air cooling kits like Accelero or Gelid? If not, what should I use?
 

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Discussion Starter · #3 ·
Hi and thanks for reply

Arent those way too tiny for cooling VRM? I mean, there is very little mass to them; I have trouble believing they could do better than 90c or so.

As long as there is clearance, shouldnt the larger 14x14mm ones work better?

Here, I found a couple of things that seemed interesting.. just have no idea if they are possible!

Thermalright HR-09 T(1/2/3) 84(L) x 17(W) x 48(H)
or
Thermalright HR-09 T(4) 64(L) x 12(W) x 44(H)
Thermalright TR-VRM 5870 [Awesome that its for this exact thing, just cant find base dimensions. Plus, the mass is probably too much for tape.

Enzotech MST-81 -- 87(L) x 16(W) x 29.6(H)
and
Enzotech MST-88 -- 94(L) x 15(W) x 29.6(H)
^ Its like the tiny ones, but no cuts. I think this would cool much more evenly, and maybe even easier to apply?

Anyone have idea if tape is enough for those?
 

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They are fine for the vrms, especially if you have a fan pointing in their directiong. You can try to find some bigger ones but make sure they are solid copper imo.

the 14x14x14 ones will work as long as you have the clearance for them
thumb.gif
 

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Quote:
Originally Posted by szeged View Post

They are fine for the vrms, especially if you have a fan pointing in their directiong. You can try to find some bigger ones but make sure they are solid copper imo.

the 14x14x14 ones will work as long as you have the clearance for them
thumb.gif
They will fall off since its not much surface area or material so they will get freakishly hot. You have to use glue with puny sinks like that. Did I mention they are puny? Hell any stick on sink is too frail for a card that has unlimited tdp and free range of voltage up to and past 1.5v. Here's to hoping for you guys that swiftech releases a 290 unisink.
 

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I never had a problem with them falling off, but i could have just gotten lucky. So yeah maybe go for something along the lines of what you see here -



(the screw on heatsink, not the epower board itself
tongue.gif
)

i think you can find some like it on performance-pcs.com or frozencpu.com
 

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The big block isn't hard to cool, its the triple cluster at the far end of the board with no screw holes nearby.
 

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Discussion Starter · #8 ·
lol
tongue.gif


@szeged I wont be able to have any fans : all fan slots are taken up and I already have a 1:4 3 pin adapter lol!

@ tsm106: So you think some 3m tape and, say, a MST-88 is a no-go? I tried to find some specifics and it looks like 250g/.5"^2 -- 12 tiny VRMs should add up to about that, dont you think? These heatsinks arent heavier than 90g.

@szeged2: I'd love for something like that, but I feel like the odds of a perfect fit (because a perfect fit is the only option
wink.gif
) is nearly 0.

P.S. anyone know the width of these cards/VRM area? I dont have the card by me now, but everyone seems to list length... no one but me cares about width.

Also, the silver squares should all be flush, vertically, and the electronics towards the "right" of them
AMD-Radeon-R9-290-4GB-GDDR5-PCB_15750.jpg
do not need cooling, but contact wont hurt them - as long as I put some thermal pad or tape inbetween, I hope?
 

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The main vrm strip is easy. You can buy blocks of heatsink core off ebay for a 5 spot. Cut that to size grind it down and you have beefy heatsink. The problem are the triple clusters for memory, etc at the other end. Those are almost impossible to keep cool with stick on sinks, especially if you are over-volting.
 

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Discussion Starter · #10 ·
Sorry, Im not really good with these terms. Im guessing you mean buy a nice chunk of "finned aluminum" and cut it to fit. If so, isnt it ok if I just buy one of the 5 listed above?

For the set of 3, I can see that is a pain. Im mostly concerned with cooling the long strip very well for now. The other set I'll just try to put on some of those cheap-o aluminum sinks and worry about improving it later.

I dont mean to come off as rude. Im just trying to be sure something like the Enzotech MST-88 or TR-09 will be an effective, safe, and practical way to cool the large set.
 

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you can zip tie an 80mm fan or something to the card, over the heatsinks you put on as well, ive had to do it in the past when working with cards that dont have full cover waterblocks, its not pretty but it works.
 

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Discussion Starter · #14 ·
@szeged: Yeah, I understand. For my universal WB cooled 7950, I used the included dual fan assembly [Vapor-X] and re-mounted it. Worked awesomely and didnt claim a fan slot. I can definitely use a fan if needed, I just need to find my second 1:4 fan adapter.

@tsm106: Sweet, so anywhere from ~78-90mm should cover everything and have no obstructions.

@szeged: Are you saying to dremel out holes into the heatsinks so taht they can be mounted?
 

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yeah grab a big heatsink and cut it to size then drill out where you need the holes to go, thats what i would do in your situation.
 

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Dude, I think yall are not realizing there is another vrm block to the left and down from the bios switch. That is the hard one to cool, not the long strip.
 

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Quote:
Originally Posted by tsm106 View Post

Dude, I think yall are not realizing there is another vrm block to the left and down from the bios switch. That is the hard one to cool, not the long strip.
i know there is, im just not commenting on it since you have more knowledge about that part so i would rather he have to just listen to you instead of go through a half hearted post from me also
tongue.gif
 

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Quote:
Originally Posted by szeged View Post

Quote:
Originally Posted by tsm106 View Post

Dude, I think yall are not realizing there is another vrm block to the left and down from the bios switch. That is the hard one to cool, not the long strip.
i know there is, im just not commenting on it since you have more knowledge about that part so i would rather he have to just listen to you instead of go through a half hearted post from me also
tongue.gif
That's the one that falls off over time as you start to work the card harder and harder. The best mod I've seen thus far is costly cuz it requires killing the stock cooler. You cut off the vrm section on the stock cooler and mount it on the card. Yea, it's not a simple mod lol. It's in the 290 club thread.
 

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Quote:
Originally Posted by tsm106 View Post

That's the one that falls off over time as you start to work the card harder and harder. The best mod I've seen thus far is costly cuz it requires killing the stock cooler. You cut off the vrm section on the stock cooler and mount it on the card. Yea, it's not a simple mod lol. It's in the 290 club thread.
ouch lol :x thats unfortunate indeed. I usually end up waiting for full cover blocks to avoid having to do all this lol.
 
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