What would happen If I used 2 heatsinks of 2 different GPUs together?

Crestfallen_12 · May 15, 2017

I have an RX470 single fan from powercolor(that is ridiculously noisy and quite hot at stress), and an hd 7850 from asus that I'm not using currently.

I'm wondering that If I could use the 7850 heatsink and fans over the original heatsink I'd get more cooling, would the heat transfer properly from one heatsink to the other?

those are the GPUs

clutchc · May 15, 2017

Where do you expect to place the 2nd heat sink? Against what? They can't both be against the GPU. You might see if it is possible to swap coolers instead, but I doubt anything would match up.

Eximo · May 15, 2017

A swap might work, the hole spacing is quite close from pictures of the bare boards, and the placement of components is pretty consistent. Both GPUs are set at a 45 degree angle. RX470 seems to have memory on four sides while the older 7850 only has them on two, but they don't appear to have had active cooling on either, so should be low enough to not matter.

If you don't mind taking them both apart and seeing what you can do, I would give a shot. Worst case you just have to reassemble them. You can then put your own thermal compound on and shave a few degrees off that way.

Crestfallen_12 · May 15, 2017

clutchc :

I said it on my first post, to use the 7850 over the 470

Eximo :

yeah, I think this is the only way to find out.

clutchc · May 15, 2017

Crestfallen_12 :

Sorry. When I read "...If I could use the 7850 heatsink and fans over the original heatsink...", I thought you meant literally "over" the other heat sink. As in on top of it.

Crestfallen_12 · May 15, 2017

clutchc :

That's what I mean , but I would have to find a way to keep them together. I'm wondering if they would work as one, transferring heat from one to another..

clutchc · May 15, 2017

Crestfallen_12 :

Seriously? Then I stand by my original post above. What would you place the 2nd heat sink against to transfer heat? The radiator fins won't do it.

Crestfallen_12 · May 15, 2017

clutchc :

Crestfallen_12 :

Seriously? Then I stand by my original post above. What would you place the 2nd heat sink against to transfer heat? The radiator fins won't do it.

Why not? anyway I will try to use just the fans first.

Crestfallen_12 · May 15, 2017

Hey guys, I did replaced the fans, but I don't know if I'm going to stay with them or install the original back(probably stay with the original), because it sounds really weird at stress (like a car) lol.

clutchc · May 16, 2017

That's probably because the card's BIOS is coded for the original single fan. Still running the new fans at the same speed but now you have two. You will want to adjust the fan curve with a third party app like Sapphire Trixx: http://www.sapphiretech.com/catapage_tech.asp?cataid=291&lang=eng

In fact, you could have done that with the original single fan. Btw, the dual fan card looks better, for what that's worth.

Crestfallen_12 · May 16, 2017

I know about fan speeds, I don't think it looks better, it looks kinda naked on the sides. But when I reinstalled the original cooler and the fan was making an weird noise and I could not fix it, so I reinstalled the dual fans.

It worries me because the plastic is touching the metal fins, but my card don't go ever above 80C so I think that won't be a problem.

clutchc · May 16, 2017

It should be OK. The fins don't get super hot like the pipes do. Hence the reason smacking a heat sink against them wouldn't work well.

But I'd still check the fins by touch occasionally until you're sure.

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What would happen If I used 2 heatsinks of 2 different GPUs together?

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