Just tested with 3GB Dominators 1600MHz 8-8-8-24-1T from a friend and it worked just fine

Only thing worth mentioning,

This was stable,
Prime95 Blend 8x instances of memtest hci 1000% , o errors!
CPU 4000MHz - 200 bclk x 20 multi
DRAM 1600MHz 8-8-8-24-1T

This wasn't stable,
Prime95 Blend 8x instances of memtest hci , 1st error within seconds!
CPU 4020MHz - 201 blck x 20 multi
DRAM 1608MHz 8-8-8-24-1T

CPU is Prime95 Small FFTs stable @ 4020MHz BTW

Oh well this is a good reason to get some new RAM i guess