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Do you have any information if it's possible to put the Genesis or Megahalems on the Asus Sabertooth Z77 board?
Genesis and Megahalems are compatible with Asus Sabertooth Z77 board.
Which thermal compound is better?  Prolimatech PK-3 or the PK-1?
PK-2's performance is a bit better than PK-1.  PK-2's core feature is its low viscosity which makes it easier to apply than PK-1 and PK-3.
PK-3's performance is the best among the PK series thermal compounds.

PK-3 > PK-2 > PK-1 in terms of performance
PK-2 > PK-1 > PK-3 in terms of ease of spread
Is Megahalems compatible with motherboards with duel sockets? (Both for socket LGA775&1366, e.g. Asus P6T-Se)
The motherboards with duel-sockets should be X58, to avoid damages on motherboards by using the wrong backplate, please do not use the attached LAG775 backplate but the one for LGA1366.
Is Genesis compatible with the rams with high heatsink?
Yes, rams around 52-53mm in height are compatible with Genesis, for example Corsair Vengeance.
I want to buy a Prolimatech Genesis, but I need to know if there is any incompatibility with the chosen mainboard "ASUS P8Z68-M PRO,Z68"(http://www.asus.com/Motherboards/Intel_Socket_1155/P8Z68M_PRO/)
Genesis is compatible with "ASUS P8Z68-M PRO, Z68.
I would like to know which methods you recommend applying the pk -1 to CPU.
Please spread out evenly a layer of PK-1 onto the whole CPU and to the whole heatsink base bottom.
I have MK13 with GTX470 and working very well, after change new case, Silverstone Fortress 02. The temperature is close to 100 degrees. Is it because of the case?
Please see the attached file of Silverstone Fortress 02, we suggest you to turn your case 90 degree (the red circle) to let MK-13 be placed horizontal.

I think it'll be helpful to solve the heat radiation problem.  Because of the engineer structure design, it'll bring MK-13 into full play when you place MK-13 horizontally instead of vertically.
I have one of your MK13 coolers on an older GTX260. Does MK13 compatible with GTX570?
We have a compatibility form for MK-13 as the below link:
Does Megahalems Rev B or C compatible with my Gigabyte Z68XP-UD3P motherboard without interfering with the RAMs or anything else?!
Megahalems Rev B or C is compatible with your Gigabyte Z68XP-UD3P motherboard without interfering with the RAMs or anything else.
During installation my Prolimatech Megahalems wiggles when the backplate is affixed to it from the bottom of the motherboard. I'm afraid to continue thinking that it might damage my board.
What you have is perfectly normal. It is by design to have the heatsink loose to a certain degree after the back plate is applied. Rest assured that every precaution had been taken into measure when we designed our retention system. As long as the instructions are properly followed, it will not be possible for your motherboard to be damaged in any way. Once installation is completed, you will see that there are no moving or loose parts. Remember, too much pressure is not necessarily a good thing as it could cause damage to your CPU and/or cause your motherboard to warp.
Can I use the first PCIe-Slot for the graphics (Gainward 560Ti 448 Cores) when I use the Prolimatech Genesis?
You can use the first PCIe-Slot for the graphics (Gainward 560Ti 448 Cores) when you use the Prolimatech Genesis.

Will I be able to install my graphic card on the first slot of my Asrock z77 extreme 4 after installing the Genesis?
Genesis is compatible with your Asrock z77 extreme 4 and you are able to install your graphic card on the first slot.
Can I used the Super Mega or the Megahalems for the Asus Z9PR-D12?
Super Mega and the Megahalems are compatible with the Asus Z9PR-D12.
Does Genesis fit with a ASUS P8Z77 V Deluxe motherboard ?
Genesis is compatible with ASUS P8Z77 V Deluxe.
Does Samuel 17 fits with the Mini ITX motherboard GigaByte GA-A75N-USB3?
Samuel 17 is compatible with the Mini ITX motherboard GigaByte GA-A75N-USB3.
Is the Samuel 17 CPU Cooler compatible with a 1155 CPU socket and ASRock H77 Pro4/MVP motherboard?
Samuel 17 is compatible with 1155 CPU socket and compatible with ASRock H77 Pro4/MVP motherboard.
Is MK-26 compatible with nvidia quadro and AMD Fire pro  professional series?
MK-26 and MK-13 are not compatible with Quadro 2000, but they both are compatible with Quadro 4000 and AMD Fire Pro V8800.
For some specific vga cards, please provide us the vga pictures so our engineers could evaluate if MK-26 is compatible with it or not.