Performance on a whole from the module was very surprising; not only was the kit performing better than some higher clocked modules or ones that carried more aggressive timings, but the overclock we achieved from the modules was surprising to say the least.
At $1199.99 it's far from a cheap kit of memory and really, it caters for very few people. Considering that top 6GB kits can cost upwards of $600, twice the price for four times the memory is impressive, though. Really, 12GB at $600 isn't a bad price at all. The drop in memory as well might mean you see a bit more of an overclock. As I mentioned as well, if you adjust the timings there's a good chance you'll end up with a higher clock rate again.
As I mentioned in the beginning, I've been using the kit myself for the last few weeks in both 12GB and 24GB form. Originally I was running 6GB and when moving to 12GB you notice some extra snappiness in some scenarios. When moving around Windows 7 we don't see too much difference; everything is running nice and smooth. Where the kit begins to shine is when I start firing up Photoshop.
Editing pictures, saving files, adding filters and more is faster than the 6GB setup. Because I'm only dealing with 2D images, jumping up to 24GB doesn't show any more improvement. Once you start getting into 3D editing, though, the extra memory starts to shine even more.
24GB has its use, as does 12GB and 6GB. Depending on the level of computing you do is going to depend on how much value these larger kits hold. What I would suggest is as you climb up to these larger 12GB and 24GB kits you want to move to an SSD setup or at least a fast RAID 0 setup.
Outside of the size, though, it's just amazing what Kingston has managed to do with it. 1T at 1600MHz DDR on 24GB of memory is just fantastic; combine a 100MHz+ DDR overclock and it's just amazing. It really shows the commitment Kingston has to providing quality modules.
It no doubt has to be mentioned just how well the ASRock X58 Extreme3 motherboard handled the kit. I really thought we would run in to a little trouble, but we didn't run into any at all.