Crucial Ballistix Tactical 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model BLT4K8G3D1608ET3LX0

Pros: Awesome memory. Runs cool, low timings, low profile. The top of the heatsinks are basically level with the ram clips on motherboards so pretty much any CPU cooler will fit.

Cons: I also had to set the command rate to 2T, but all other timings were correctly detected in my Asus Maximus Gene-Z. Some motherboards will need a BIOS update to work with 32gb so be sure to check that before you sell your old ram!

Other Thoughts: For a matched set of 32gb you can't do much better.

Pros: This RAM appears to work as advertised. I used it to replaced a set of CORSAIR DOMINATOR GT 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 15000) Desktop Memory Model CMT32GX3M4X1866C9 sticks purchased at New Egg. The Crucial RAM is low power, has generally faster default timings, and seems to LOVE the G1.Assassin2 X79 based motherboard.

Cons: In my particular case, I found that I needed to set the command rate manually in the bios. This is likely not an issue with the XMP settings within the RAM modules but the motherboard itself. It may be an issue for you that the ram runs at 1600 MHz, as opposed to 1866 MHz as some of the faster gamer ram modules do. That said, it doesn't seem to make much of a difference when benchmarking.

Other Thoughts: These RAM sticks were pleasant surprise. They are low-power at 1.35 volts, and they run without issue at high-speed at 1600 MHz. It is probable that you could probably run the ram at higher speeds while increasing the voltage to 1.5 V. So this might actually be decent high-density chip based overclocker ram. Running a full set of tests at 1333 MHz and 1600 MHz using memtest 86+, I did not find any issues whatsoever After 24 hours worth of burn in...

Pros: Haven't had any problems. Having 32gb of headroom is fantastic. Giving each of my VM's 4gb.

Cons: Had to set a couple timings manually.

Pros: After setting my BIOS to read the SPD data I got 1600 Mhz at 8-8-10-24 timing. Windows 7 memory check showed everything working fine. The memory is indeed low profile so will fit when giant CPU coolers or the like get in the way of other memory.

Cons: The specs say 8-8-8-24 timing. So why does the SPD data give me 8-8-10-24 timing? That's not a huge difference but still -- the memory should operate as advertised.

Other Thoughts: I have made no attempt to see how this memory performs if you overclock it. Nor have I had it long enough to make any conclusions as to reliability.