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Max volts for GTX 580 on air? - Page 2

post #11 of 16
I ran 1.15v with 950core and my temps didn't suceed 63c load after crysis and stuff, but it seems its like 1 step off from being fully stable.
Has anyone had any issues running 1.2v on the reference cooler? I know this isn't the 570, but I've actually ran a 570 1.2v 24/7 before without any issues.
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post #12 of 16
OP if you don't really like the VRM sinks you currently have then these are my favorite and being copper and likely more substantial than what you have now they should be an improvement. If you don't mind attaching them permanently then you could use some thermal adhesive which would also transfer a little better than the thermal tape your are likely currently using. If you want to stick to thermal tape then these come with some included but if you are covering a large area or need to cut some sinks in half to fit smaller areas then you may want to pick up a larger piece of thermal tape so that you don't have to use many little pieces, this is the same thermal tape that the sinks I recommended come with but in a 2"x2" piece. If vertical height isn't an issue then go with those 14mm ones I linked above and I would actually splay the fins out on them a bit to have them take up more surface area, if vertical height is an issue then here are the same sinks but only 9mm high, also splay those out as much as possible. If you have decent airflow over them then I would think that anywhere from 1.13 up to as much as 1.16v would be pretty okay for 24/7.

Living Champion, I don't like the idea of going over about 1.12v on the stock unisink for safe 24/7 use. I lean a little bit conservative since I am folding 24/7 so take that into consideration but just keep in mind that stock VRM cooling is just a contact plate so it has very little surface area to dissipate heat with and can therefore have it's capabilities overcome rather easily in comparison to even basic aluminum sinks if they actually have fins and decent airflow.
Edited by juano - 5/14/11 at 7:49pm
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post #13 of 16
Quote:
Originally Posted by juano View Post
OP if you don't really like the VRM sinks you currently have then these are my favorite and being copper and likely more substantial than what you have now they should be an improvement. If you don't mind attaching them permanently then you could use some thermal adhesive which would also transfer a little better than the thermal tape your are likely currently using. If you want to stick to thermal tape then these come with some included but if you are covering a large area or need to cut some sinks in half to fit smaller areas then you may want to pick up a larger piece of thermal tape so that you don't have to use many little pieces, this is the same thermal tape that the sinks I recommended come with but in a 2"x2" piece. If vertical height isn't an issue then go with those 14mm ones I linked above and I would actually splay the fins out on them a bit to have them take up more surface area, if vertical height is an issue then here are the same sinks but only 9mm high, also splay those out as much as possible. If you have decent airflow over them then I would think that anywhere from 1.13 up to as much as 1.16v would be pretty okay for 24/7.

Living Champion, I don't like the idea of going over about 1.12v on the stock unisink for safe 24/7 use. I lean a little bit conservative since I am folding 24/7 so take that into consideration but just keep in mind that stock VRM cooling is just a contact plate so it has very little surface area to dissipate heat with and can therefore have it's capabilities overcome rather easily in comparison to even basic aluminum sinks if they actually have fins and decent airflow.
You think these guys will fit under a reference cooler? I'm comfortable running 1.15v on stock so far. My temps are fine, I don't know about my VRM temps though. Buying these wouldn't hurt.
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post #14 of 16
Well if you did get those you would at the very least have to take off the stock unisink, but I can't say whether or not they would fit but my guess is no. I'll do some more research to see if they might work with the reference cooler but I mainly posted those sinks for the OP because he has a Shaman which shouldn't have any height issues with the 14mm ones.

EDIT: OP I did a little bit more research and it looks like you could also use the Thermalright VRM-G2 VRM cooler, by only removing one of the screws on it's backplate so it would only be secured by 3 screws instead of 4 but it looks like it would still have good contact and would likely still the best air VRM cooling available. Here is the post about 3/4 the way down this page I saw that confirmed this would work, I also compared the reference 480 and 580 PCBs myself and it looks to me like the VRM-G2 would work.

LivingChampion It looks like the VRMs are located directly under the stock fan (they are the leftmost thermal pads in this picture) so it wouldn't work with the reference cooling no matter what you did. It looks like you would have to go aftermarket cooling to get any better cooling than reference.


Edited by juano - 5/14/11 at 8:58pm
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post #15 of 16
I see, thanks.
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post #16 of 16
Quote:
Originally Posted by LivingChampion View Post
I see, thanks.
Another option you have available to you is if you were considering a new case in the future, where the motherboard is rotated 90 degrees work very very well with the reference cooler on your 580. It would keep your 580 cooler and therefore quieter and is just about the best case for air cooling on the market, and very reasonably priced for what you get. That would be my next case without a doubt but it doesn't work very well with coolers where the heat pipes go down once rotated (as in my GPU cooler and the OP's) because the vapor/liquid would be working against gravity going back to the hot portion of the pipe rendering the capillary action that normally gets it there fairly ineffective.
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