I looked at those - I was attracted by one set of numbers and put off by the other! Be interesting to know if there's much difference but I'm not sure you can read the memory or VRM temps off the card can you?
There's quite a few people elsewhere that swear by it. The EK stuff generally only has 3 or 5w/mk, so this is a big difference, so do the Akasa thermal pads which are actually really poor from experience. The pads are also a different material, they crumble if you rub them and if they get too compressed when tightening waterblocks they leak a little silicone oil which isn't conductive however. Not sure if I can read those temps individually but I definitely can measure my Motherboard's chipset temp which is blocked with that thermal pad and having pushed this motherboard hard and knowing how well it used to perform, I should be able to deduce easily any noticeable difference (it's a great overclocking board!)
Hopefully I can push the GPU's and BCLK higher with better heat transfer these pads provide and stay within reasonable temps, I guess that depends on Asic Quality but not sure how much of a real world difference Asic Quality makes.
One of the GPU's has a 70% ASIC Quality and I don't know about the one I just waterblocked. After doing some digging it seems lower Asic Quality GPU's would benefit from being watercooled than on air and higher Asic Quality ones are better on air due to generally less heat and power, however their overclockability tapers off quicker than a lower asic on water...I dunno, there's mixed information out there....
Also....going back to my last couple posts about the GPU's hitting the reservoir, I have to shift the Res at least 40mm to the right to avoid the cards. I don't think I have that much room in the case to shift it before it hits the 5.25" bays which I have removed temporarily. I can cut out just enough for the res and stick in my Bluray drive and the Aquaero controller but I might have to leave the Alphacool dual res I got earlier for another PC if that is the case (which tbh is probably what I should've done in the first place as its not necessary, but I like the look of those bay mounted res's).
I think if I get a big square piece of sheet steel (maybe 2mm) and line it up with the 5.25" bays, I can push the res 40mm to the right and get reinforcement from the 5.25" bay (which I will need to drill into to screw the steel plate to as well as cut down to fit the res). It would mean my motherboard tray won't be moveble anymore which isn't a big deal once it's all tubed up. I guess that would work....