Have you tried looking in the Coolermaster V8 Forums for an answer? I'd also recommend checking the warranty to see if you're entitled to a replacement.

BTW, the brackets on the i7 model are different, and take a look at the pdf their site supplies for i7's. The noise isn't a good sign and might mean it's become partially unseated from it's spindle....

The coolermaster V8 looks extremely cool no doubt, but when it comes to air cooling a high end cpu i only think of Noctua.
LightStar i also have seen many references to the corsair H50 Hydro but they never mention how you change the fluid for it .

you don't change the fluid in it. that's part of what makes it so darned good. i had an H50 for a year or so before i switched to an H60. it has an improved reservoir and a square pump housing/contact area versus the round one on the H50. actually, i still have the H50. it's sitting in the box on a shelf. before the H50, i had a Coolermaster V8. Jafo has one partially because i highly recommended it to him.

to the originator of the thread, if your fan is going bad, they are very easy to replace. just pull that plastic cover off the V8. i'm pretty sure there are a couple screws holding it on and then there are 2 screws holding the fan in place. just get a 120 mm fan of your choosing and replace it. i did that the day i bought the V8 because i didn't want the red led lights in my case.

edit: actually, i think you need to remove the two screws holding the fan in place and then the entire fan/plastic top assembly on the V8 just lifts off. you'll probably need to remove the entire V8 from the mobo, tho.

You don't change the fluid at all Rolocolor, it is self-contained.  Sealed. (oops, John already said that, oh well!)

What is a CPU fan ?

Have always think that a good case airflow was enough for my power hungry Xeon ( 120 watt each )

I know its possible but not in a midi tower and thats what i use im a silent fan and also thought about passive cooling but then again i doubt that my temperatures will stay stable i just got a nice lian li case and im about to install my new hardware. Even while i have 3 x140 mm fans and 2x 120 fans in there  the cpu wont be cooled enough...So i bought myself the Noctua NH-D14 its a monster but its ultra silent and mostly beats everything on the market unless proper liquid cooling kits.
I just had a look at the corsair H60 and 70 and 100 in comparision to the NoctuaD14 and all of them couldn´t compete on a silent level...only the corsair H100 could but on max fans with a noise level that would make your vacum cleaner jealous but the 100 did good with very high noise on the temps it was about 7 degrees better than the noctua but i prefer to be silent over a 7 degree lower temp and a high noise.
But i do like the rig you posted the only question would be if you OC would it run stable ? BTW 1kw/h is more watts than my oven would use up on the highest setting

No you got me wrong i was talking about a setup equal to the picture on a normal rig actually i forgot to write it correctly lol well what i meant was not a server setup... ) more likely an i7-2600k setup with OC that would run passive cooled

Taz, you're getting facetious again.

Well, at some computer show, i have see system where one of the side panel was replaced by a massive alu radiator... on the cpu, gpu, northbridge, and ram, there was tiny copper plate with heat pipe heading to the side panel...

Anyway, all the special thing are somehow costly and are only useful if you build your computer for the long term...

Well, it is my rig, so i like it too ... spec are based on the MAC pro from 5 year ago... for a similar configuration, Apple was asking around 15k euro... building it myself have reduce the tag price to 5k... in the configuration was included a laser color printer all in one, OZAKI home cinema box, etc...

I don't know what is OC but i have setup/buy these computer for 3D graphic... it is not unusual that the rig is running for days or weeks only for render some short video clip... 6 x64 raytracing render engine using 6 or the 8 core, GPU used via cuda/physx for calculate collision and dynamic... at these moment, computer is at full power use a lot of energy... both CPU use 120w, graphic card use 350w, each memory bank use 15w, have 8 HD running, double internet port, etc...

About stability, in 5 year, only 8 memory error ( 5 was 1 bit corrected by Nx ) and 3 was 2 bit corrected by the ECC ( have registered fully buffered ECC DDR-2 ram, cannot be used on usual motheboard ) ... my ram is mounted in raid mode ( one half mirror the other half )... ram, processor, harddrive are hot-plug ( not when running windows )... etc... these system are build to be stable... bank server have big closet filled with numerous 1U rack have similar motherboard...

It is not... it is between a "server" and a "desktop", it is called a "workstation" : http://en.wikipedia.org/wiki/Workstation

"They are optimized for the visualization and manipulation of different types of complex data such as 3D mechanical design, engineering simulation (e.g. computational fluid dynamics), animation and rendering of images, and mathematical plots... Some workstations are designed for use with only one specific application such as AutoCAD, Avid Xpress Studio HD, 3D Studio Max, etc."

In bold, some of the reason why i have a computer like these... that these workstation is a awesome game platform is a side effect ...

As today, you cannot yet have a setup like mine on a usual desktop computer...

For example, let see the memory speed... the QPI interface run at 4.8 gb/s on usual i7, at 6.4 gb/s on top i7... processor can have between 1 and 4 QPI... the best Core i7-9xxX Extreme edition have a full four quadrant QPI at max speed 25.6gb/s... some i7 like the Core i7-9xxXM extreme edition use the DMI 2.0 interface with a max limit of 20 gb/s...

My old workstation ( buy long before the i7 even exist ) have a memory interface who run at 32gb/s...

Reason is simple... if Intel/AMD was putting all the feature of the Xeon/Opteron in the i7 ( who is a desktop processor ), they will be shooting in their own foot and kill the lucrative market of the server processor...

I was once a desktop owner... for remain at level, i was almost obligate to buy a new 1k computer each year... now, i have move professional, i buy a 5k computer each 10 year... in the long term, it is 50% cheaper...

Maybe the next generation of desktop extreme edition will be equal to my actual computer but this one is already 5 year old... at 10 year old, it will be similar to a usual desktop... will sell it ( workstation have good second hand price ) and will buy my next top workstation that i will use for the next 10 following year...

I am a greedy man but not a stupid one... i don't buy cheap shit who become outdated after a few months... i buy expensive one who last for almost forever... and it spare me a lot of problem similar to these from the OP ( fan problem, PSU problem, game performance problem, etc )...

Alright so with my fan being iffy, with the problem coming up at random times, and sometimes not at all, i've decided to replace it out of sheer consistency. I was thinking about water cooling, is it really that much better and worth it, or should I just get a V8 again or another good air cooling system?

the corsair H series units are sealed and do not leak. they are guaranteed for either 3 or 5 years. as for air cooling, the V8 is really good. you can't go wrong with either thermalright or prolimatech towers with a good fan.