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Should I bother tossing heatsinks on any of these?

post #1 of 22
Thread Starter 
Just got a used 480 from the marketplace ... won't mess around with the stock cooling for a while (haven't even installed the card yet) but I notice a lot of chips on the back of the pcb that are bare. I was wondering if anyone can help identify them and suggest whether or not I should bother sinking them? I do have tons of mini-sinks, so I won't have to order anything to do this. Will be sinking the front of the card when I install the mcw82 next week anyway.

Also, I know this is ghetto, but while stress testing it tomorrow, can I just touch the various chips to see which is hot and which isn't or does that risk shorting the board? I know the GTX 400 series doesn't come with vrm temp sensors ... probably because people were freaking out about the gtx 200 series vrms hitting 120c lol.

thnx



Edited by Steven-1979 - 7/27/11 at 5:40pm
    
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post #2 of 22
I say, the five NEC/Tokin capacitors (green rectangle) do not need additional cooling but adding little sinks for the twelve MOSFET pairs (red rectangle) might benefit (if you are a cooling enthusiast or extreme overclocker). The benefit might not be substantial because it gets that aluminum heatsink strip on the front side already.

Regarding touching with fingers: if you have to, I suggest you wrap your fingers with some saran wrap to prevent any possible short circuiting as your fingers might be sweaty/oily/dirty.

Short of using an infra red thermo sensor to read temperature off a component, you might use an old fashion thermometer. Put the tip onto the surface for a while and I suppose you can get a fairly accurate measurement. Of course, make sure the thermometer has a range fitting for the purpose.

Edited by windfire - 7/27/11 at 7:34pm
post #3 of 22
I honestly wouldn't worry about the vrms. There is just so many of them that they probably won't ever be taxed too hard. I would consider sinking the memory though.
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post #4 of 22
Thread Starter 
Quote:
Originally Posted by windfire View Post
I say, the five NEC/Tokin capacitors (green rectangle) do not need additional cooling but adding little sinks for the twelve MOSFET pairs (red rectangle) might benefit (if you are a cooling enthusiast or extreme overclocker). The benefit might not be substantial because it gets that aluminum heatsink strip on the front side already.

Regarding touching with fingers: if you have to, I suggest you wrap your fingers with some saran wrap to prevent any possible short circuiting as your fingers might be sweaty/oily/dirty.
Thnx for the advice. Great idea with the Saran Wrap. I wouldn't have thought of that. With the vrm you mention, on the front aluminum strip covers a row of vrm ... then on the back, there are those two rows you highlighted in red, one to each side of the sinked front vrm. It's two different bundles (this model is advertised as having twice the phase/vrm of the ref models, so there are a lot of them on there).

Quote:
Originally Posted by BababooeyHTJ View Post
I honestly wouldn't worry about the vrms. There is just so many of them that they probably won't ever be taxed too hard. I would consider sinking the memory though.
Yeah, I guess I'll do the finger test before deciding either way ... but thats gonna be a lot of mos-c1's if I do decide too.
    
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post #5 of 22
Even if they are slightly hot, it wont hurt to put some sinks on them. It would be a good investment. Do what ever you can to make your cards last as long as possible.
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post #6 of 22
I have the same card, and have never put heatsinks on anything on the back. Not only that, but I have a lot of voltage going through the card with a high OC; my card is at 950/1900/2035@1.2v. It's under water with a GPU-only block, and the only thing I put heatsinks on are the actual VRAM modules, the VRM's already have a heatsink on them, so you don't have to worry about that.
 
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post #7 of 22
Thread Starter 
thnx for the advice everyone. + reps

Quote:
Originally Posted by TheRockMonsi View Post
I have the same card, and have never put heatsinks on anything on the back. Not only that, but I have a lot of voltage going through the card with a high OC; my card is at 950/1900/2035@1.2v. It's under water with a GPU-only block, and the only thing I put heatsinks on are the actual VRAM modules, the VRM's already have a heatsink on them, so you don't have to worry about that.
Nice. Yeah, I heard these cards can take a ton of voltage since they have twice the normal amount of power phases. I'll be doing the same as you ... recycling my mcw82 to watercool the gpu while sinking everything else. The irony is that my main card, which will be this GTX 480 once I get everything, will be gpu watercooled while my GTX 260 c216 physX card will be full-cover water cooled, lol. Have you ever noticed those chips on the back getting hot or anything? 950 core is epic, pretty much my goal with this (900-950 ... anywhere in between should be more than enough for me). What kind of sinks did you toss on the vram?
    
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post #8 of 22
I tossed these on my VRAM modules. You won't be using everything that comes with that set, but maybe you can use the left over stuff to put on the things on the back if you'd like.

And to be honest with you, I have no idea how hot the back of the card gets, but I do constantly check the PCB temps on the card, and they max out at around the low 50's in Celsius while doing OCCT with the real high OC; the PCB never hits 50 while gaming though, usually 47 is the highest it gets on BC2 with 8x Transparency AA (Supersampling), otherwise it's more or less around 45 degrees.

Oh yeah, I get those temps with 4 fans on the card!!! I'll post a pic here in a second.


EDIT:
As you can see in the two attached pics, I have three fans underneath the card, and the fourth comes from the side panel fan (not pictured); however, I don't have one directly on the power phases, covered by the very long heatsink:

(Picture provided by Lord Xeb in this thread.)

I plan on changing that, namely by removing the 80mm fan and replacing it with a 120mm fan so that it can hit those two main parts at the same time.


Edited by TheRockMonsi - 7/27/11 at 9:03pm
 
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post #9 of 22
Thread Starter 
Nice setup. Yeah, I noticed that long sink wasn't getting direct air ... if you're still at 950 stable though, that can only mean good things since it probably means those vrm's (and the ones on the back) aren't getting too hot and effecting stability. Have you thought about modifying the stock fan to fit over the card (separated the stock heatsink) that way you won't have to use those extra fans?
    
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post #10 of 22
The fans are individually attached to the heatsink and bound together by no means, so there's really no easy way of getting them on my card to cool everything. Plus, they have a weird connector that's used to connect to the card for power, and I don't have anything like it. So the easiest thing for me is to just surround it with fans in the expansion area, side panel, and where ever I can zip-tie fans to.

The long heatsink isn't getting any direct air on it, but I don't think that's too big a problem since there's a lot of air flow around it.
 
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