I've recently changed the standard cooler of my GTX 780Ti to this Raijintek Morpheus cooler, with two Scythe Kaze jyu 100mm 2000 rpm fans (SY1025SL12M), and I'm quite amazed that the card is running at 56°C instead of 75°C, with much less noise.
You can witness the change in this task's stderr.
Roused by this, I've changed the cooler of my standard GTX980 also, and it runs at 45°C instead of 70°C.
The cons of this cooler are:
1. It's very wide (especially with two standard 25mm thick fans), so it's not really applicable for multi-GPU systems
2. The aluminium heat sink pieces are not fully compatible with these cards, as I had to cut the VRM heatsink in half for the GTX 780Ti, and use the leftover memory heat sinks for the GTX 980, as the FETs of its VRM have a quite different arrangement, and the supplied VRM heatsink can't be applied to a GTX980. Moreover the RAM chips in the GTX980 are closer than on the GTX780Ti, so I had to cut the edges of the RAM heat sinks to avoid it to contact with the main (GPU) heat sink's heat pipes.
3. The supplied thermal twin adhesive didn't stick to the RAM chips (only to the heat sink), so I had to use a leftover thermal adhesive from Arctic Cooling Xtreme.

I'd like to add an important notice for those, who change the original heatsink / cooler assembly on their GPU:
The metal frame, which acts as the memory / VRM FET heatsink, also acts as reinforcement, making the card rigid.
Without this frame, when the card is fitted horizontally its PCB could be easily warped by its own weight (plus the weight of the PCIe power cables), shortening the lifespan of every soldering, thus of the whole card.
Some factory OC-ed cards are manufactured without such frame, so it applies for those cards too.
To avoid warping the PCB, I underpin the inner end of the card (at the PCIe power connectors) with a proper sized stick (actually I've cut a bamboo skewer to the needed length). There are other (more professional) accessories for this purpose.

Impressive cooling performance! I do wonder though how such solutions improve cooling of other critical components, such as the VRMs and memory chips (esp the VRMs). Even with high quality solutions, such as EVGA, these components are treated as second-class citizens, left to be cooled by smaller heat sinks or metal plates and thermal pads. One can say, these cooling solutions are capable enough. I do not however feel very comfortable with components in my computer working 24/7 at 90-100C. Of course, others may feel absolutely comfortable!

With Maxwell, one could think that VRMs do not get so hot as with Kepler or Fermi, since it requires less power. Less power can also be delivered with fewer VRMs working harder however, so cards end up with fewer, but also equally (or almost) hot VRMs.
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If your cards are not HOT they aren't working hard enough :-)

However, GPUGrid has a better cooling solution, no work available. :-( Or have a lot of users got a stash?

Thanks for the heads-up Zoltan !
Really interesting :)
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[CSF] Thomas H.V. Dupont
Founder of the team CRUNCHERS SANS FRONTIERES 2.0
www.crunchersansfrontieres

I do wonder though how such solutions improve cooling of other critical components, such as the VRMs and memory chips (esp the VRMs).

Even with high quality solutions, such as EVGA, these components are treated as second-class citizens, left to be cooled by smaller heat sinks or metal plates and thermal pads.

One can say, these cooling solutions are capable enough. I do not however feel very comfortable with components in my computer working 24/7 at 90-100C. Of course, others may feel absolutely comfortable!

With Maxwell, one could think that VRMs do not get so hot as with Kepler or Fermi, since it requires less power. Less power can also be delivered with fewer VRMs working harder however, so cards end up with fewer, but also equally (or almost) hot VRMs.

Thanks for your response Zoltan! You are absolutely right in your observations / conclusions.

Myself, I wasn't even aware of the other heat sources on a graphics card, until I read an article on Tom's Hardware on the thermal behavior of different implementations of a specific Nvidia GPU (I can't remember which). It was in that article that I saw how different manufacturers (top, middle or "cheap") treat those other heat sources in different versions (again top, middle or "cheap") of their cards: range is from total indifference ("let them cool themselves off") to dedicated parts of the card's cooler. I figured, for 24/7 demanding operation, cooling all the heat sources is important and not all cooling solutions are equal.
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