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MSI GTX 580 Lightning SLI - LOUD! - Page 7

post #61 of 72
Quote:
Originally Posted by -Apocalypse- View Post
Can you lower your fans? If you let the card get to ~80C (I wouldn't go past ~82 for furmark load), you might be able to go with capping your fans lower and it won't hurt the card.
this is what I do actually , the fan speed never goes above 65%.
post #62 of 72
Can't have everything. Its either performance or silence.

Personally I'd have gone for the reference versions. Even when OC'ed to 900 they are pretty quiet under load, due to the cool running nature of the GPU.
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post #63 of 72
Think you are placing them too close together twinfroz cooler for some reason are very loud and dont cool that well if you place them very close so does the asus cu ones....

Get a new board with wider spacing or multi pci-e slots if its the case???
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post #64 of 72
Hmm, I haven't really had any issues with noise. If I play a game with VSYNC on my Lightnings never even get audible. If I turn off VSYNC they can get noticeable but certainly not obtrusive. Then again, I don't mind fan noise so that may be why it doesn't bother me. I can say for sure that they are quieter at max fan speed than my EVGA 560Ti's are at max....
post #65 of 72
Thread Starter 
Quote:
Originally Posted by Ulver View Post
I have a pair 580GTX lightnings in SLI and they are VERY quiet
Fan speed never goes above 55% and temps on the top card are never above 82C (with ambient temps at 31C - hot summer ). Bottom card is usually 5C below the top's temp.

Most silent SLI setup I've ever had (and believe me, I had my share).

Your problem is basically your case.
Not that there is something wrong with it, it was simply not made for internally exhausting videocards. Thats all.
The problem is that, all the internally exhausting videocards depend on the card being in the horizontal and, in the Raven's they stay in the vertical (right?).
Therefore the cooler becomes less efficient and it must spin faster.

It is therefore ideal for reference coolers, since the air on those moves from the front fan to the back of the card (which is on top in your case).

55% max? I would've been quite happy with that too. Try setting your fan speed to 75%, that's what I normally would've heard, even at medium load.

I understand very clearly now that my case must have been my issue. It makes sense, if a card exhausts internally, yet the Raven case situates it vertically, the card will first exhaust the hot air, then that hot air will travel upwards going through the card's circuitry again, to be exhausted through the vents.

Myth busted, do not get internally exhausting cards with Raven cases.
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post #66 of 72
Not quite. I also get very acceptable temperatures at around 55% fan speed.
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post #67 of 72
Quote:
Originally Posted by Scytus View Post
55% max? I would've been quite happy with that too. Try setting your fan speed to 75%, that's what I normally would've heard, even at medium load.

I understand very clearly now that my case must have been my issue. It makes sense, if a card exhausts internally, yet the Raven case situates it vertically, the card will first exhaust the hot air, then that hot air will travel upwards going through the card's circuitry again, to be exhausted through the vents.

Myth busted, do not get internally exhausting cards with Raven cases.
Yeah, but I did over-generalize things a bit and must explain my ideas here:

I should've said that internally exhausting videocards should work better with their longer axis on the horizontal (Instead of saying that they "depend on being horizontal"). So, that could be with the mobo laying flat on a bench or on a regular case like mine CM 690. (BS concerning ASUS 580 GTX DCII removed from here )

I think that for it to be ok on a Raven, you would have to open the slot between the cards (if you had one) to allow hot air to exhaust through there and maybe add a fan to blow air from the bottom of the cards (on the standing orientation) towards the top of the case/top of the vertical cards. Or even a fan exhausting on the top of the case so, sucking air from the cards and blowing it up and out of the case (although that would look ugly ). That way the cards would have a constant supply of fresh air, and hot air would NOT accumulate (much) on the top of the case.

So yeah, I believe that the Raven case is not well suited to internally exhausting videocards.
Edited by Ulver - 8/14/11 at 7:41pm
post #68 of 72
My 6950 TFIII was next to silent..since the Lightning uses the same cooler (more or less) this baffles me slightly
    
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post #69 of 72
Thread Starter 
Quote:
Originally Posted by NFL View Post
My 6950 TFIII was next to silent..since the Lightning uses the same cooler (more or less) this baffles me slightly
Yea what I assume would keep them quiet would be the cooling performance, the fans might not need to go beyond 55% on max load. In my case however, my cards would get hot pretty quickly, and the fan speed would have to be around 75-80% just to keep it stable at 90C.

If you want you could try manually setting your fan speed to what mine would have stayed at, you may hear for yourself what issue I was having.
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post #70 of 72
Quote:
Originally Posted by Ulver View Post
Yeah, but I did over-generalize things a bit and must explain my ideas here:

I should've said that internally exhausting videocards should work better with their longer axis on the horizontal (Instead of saying that they "depend on being horizontal"). So, that could be with the mobo laying flat on a bench or on a regular case like mine CM 690. But some cards, like the Asus 580 GTX DCII could (I think) work well even standing vertical, since they have 3-slot space to exhaust top-wise and the heatsink's fin array has good spacing from the circuit board (of the card).

I think that for it to be ok on a Raven, you would have to open the slot between the cards (if you had one) to allow hot air to exhaust through there and maybe add a fan to blow air from the bottom of the cards (on the standing orientation) towards the top of the case/top of the vertical cards. Or even a fan exhausting on the top of the case so, sucking air from the cards and blowing it up and out of the case (although that would look ugly ). That way the cards would have a constant supply of fresh air, and hot air would NOT accumulate (much) on the top of the case.

So yeah, I believe that the Raven case is not well suited to internally exhausting videocards.
Yea see this is what I would call focusing too much on the minutia or getting tunnel-vision. The two cards you just listed as examples are the exact opposite that I have experienced from my first hand experience with both cards and cooler in question. I'll explain the reason but it's important to note first that what I'm about to explain is not just focusing on the minute details, this makes a huge difference in practice and should be one of the first things considered when standing a GPU vertically while direction of the fins is one of the last things if even considered at all.

The heatpipes in the Asus DCII cooler are terrible for standing vertically, I haven't been able to confirm with Asus (their reps I've been able to get ahold of have no clue what I'm talking about) but all my evidence points to the heatpipes in the DCII being groove type heatpipes which are heavily influenced by gravity and therefore do not work well at all when the heatpipe is facing downwards away from the heat source. The vapor collects in the bottom because the capillary action in the groove type wick isn't powerful enough to overcome gravity. 3 out of the DCII's 5 heatpipes face downward, in my personal firsthand testing and experience this has accounted for atleast an 8C degree increase in temperatures based on orientation alone. I do not subscribe to the idea that fin orientation will have any significant effect on temperatures but I'd love to see anybody show me anything even half as significant as 8C from fin direction.

The TFIII cooler in the Lightning however employs heatpipes that have a powdered sintered metal wick design (this was independently confirmed by two MSI reps, and is proven by my own testing) which have a much stronger capillary flow and are therefore much less dependent on gravity and orientation to work effectively. In my testing of rotating cases 90 degrees (both my old Antec 300 and my new RV03, to have both orientations in both cases) the TFIII cooler is only 2-3C hotter and less effective when it has to work against gravity in a vertical position compared to the 8+C in the Asus.

Once again I'd love to see anybody who chooses to focus on only the minute details to show me an difference due to fin orientation or any other of these little "optimizations" that have a difference anywhere near as significant as 8C. Oh and that was on auto fan speeds by the way so it also ran it's fan faster trying to keep cool and was still 8C hotter. I also did tests with the fan speed locked but I don't remember the differences there because the DCII was very quiet so the fan ramping up didn't affect me and I don't know what I did with my notes, I might've thrown them away, but I do remember the 8C auto fan speed difference because that was what meant that I wasn't comfortable having a groove type heatpipe in a vertical case. Other tests have shown this effect to be as great as 20C in other similar coolers.

(Link seems to be down now but was working when I last needed it a few days ago.)
Edited by juano - 8/14/11 at 8:03pm
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