Mixing CMG6GX3M3A2000C8 and CMT6GX3M3A2000C8

[E.R]

Long story short, i need more than 6GB and the dominator GT 2000 8-8-8-24 i have (CMG6GX3M3A2000C8) dont exist any more and is replaced with a new one (CMT6GX3M3A2000C8) with slightly looser timings (8-9-8-24) .
Would it be a very bad ide to get the new dominatorGT CMT and ad to the mix or would it be better to go for some 4GB sticks or some 6x2GB kit with "matched" sticks. I am however limited to Corsair due to the memorycooler i use (MIPS corsairedition-wc block). I have no problem to run them at only 1600Mhz as long as they can do CL7 togheter and play well with eachother.
It will be on the EVGA 4-way Classy E762 and will either way inpact CPU OC more than the other as i read that using 6 dimm may be bad for OC.

[BeepBeep2]

The new ones are different chips than the old ones (Hyper vs PSC) and I believe you'd have some problems mixing them.

I'd just go for some matched kits.

[E.R]

Yhea, i just put me up for the 3x4GB dominator 2000 kit instead that i get om thusday.