Ha! It says overclocking isn't recommended. Who do they think is going to buy this? XD

Prolimatech does not recommend using that on a GTX 480.  They say the GTX 480 gives off too much heat.  Results on GTX 400 cards are not very good with the MK 13.  People have gotten ridiculous temperatures with it, and needed to tilt their cases forward to get decent results.

Avoid.

heh..tilt their cases forward?

Yah, Frozen CPU isn't the cheapest place around...

IMO W/C should be the only thing you should do to the 400 series if your spending money to upgrade the cooling. Air cooling can't even come close. 

Arcane

I've got 2 of them on my 470gtx SLI setup, no idea why people aren't getting on with them, user error?

In my rig, I had a mk-13 on a single card config at 98% GPU, two 120mm fans at 1000 RPM which is vastly quieter than a single 140mm at 1700 RPM.  I topped out at 85C, and that was with a 480, not a 470.
try turning your case upside down and retest.  Bet you run 20C cooler with contact plate gravity fed and no other changes.  

Interesting thoughts guys,

For me the initial reason for buying the MK-13's was purely noise, (i've got 3 intake fans on my case and a good distance between the two cards so I don't think they're starved of airflow).

I was quite frankly shocked by it, having two of them will, of course, increase the temps and therefore fan speed but I wasn't prepared for the level it generated, I suppose coming from 5850 crossfire spoilt me (purely in noise I might add, personally I found crossfire very poor).

The temps were hitting 93c using combuster, I wasn't bothered by this particularly as it's within tolerance but any reduction is nice.

Stock Cooling:
750 on stock volts, stable 93c max.
775 needed 1087 and that was just scary, over 100c in less than 4 minutes
Fan noise was atrocious, any attempt to reduce fan speed in Afterburner crashed it.

MK13's
With the 2 140's at 1700rpm

750 on stock volts, 67c max
800, 90c top card, 80 bottom card.
Still too noisy for me but better than the stock cooling.

MK13's
With 1 140 at 1200rpm (ish)

750 on stock volts, 80c max
800 too much for it imo, top card hit 93c.
Nice level of noise.

I've no doubt that using one card would improve things drastically, SLI is a challenge to keep cool on air quietly. During gaming the temps never reach anything near the level Combuster generates, Metro 2033 tops out at 72c.

Chizow, the bar connects to a pci plate so could potentially fit anywhere there's a slot free. Fans in pics are the 120's, the bottom card's still cooler.

jcde7ago, no worries, didn't take offense at all,  nice to see other comparisons. 

^ There's an attachment bracket kit I believe shipped with the Prolimatech cooler...

No, it's very different. I think it's a two piece kit; one is a PCI slot bracket, the other is a long metal piece with screw holes on it. You screw the second piece to the first and then the fans to the second piece. See where the fans are screwed in? That dark colored horizontal piece is the second piece I'm talking about...

Very nice, I am probably going to just liquid cool mine instead.

jcde7ago
For me, during stress testing my 470's on OC Scanner, temps do not go higher than 97 celsius on max voltage at 800/1600/1900 on 100% fan................,

If one buys a 470, the first thing you do is the  "twice the cooling, half the noise" on the stock cooler mod which can't be done on the 480.  So no real reason to go aftermarket in the first place.

Absolutely, Gryphon!  Had the 470 cooler been used on the 480, we wouldn't be seeing all these threads about the horrid cooling/noise of the 480.   How in the world did the 'genius' at Nvidia get away with what's argueably the biggest design blunder of the computing era? Considering how many design reviews the 480 went through before sign-off, you'd think that at least ONE person would have asked "uh..what's that air-blocking shield for?"