I have 256GB Sammy 830 in my HDD bay and 512GB Crucial m4 in my optical caddy
😉 Both work fine, no problems whatsoever.
If had to do it again, I'd try to find a
500GB Samsung 840 (non Pro) somewhere cheap ($300 or less, it was $299 on Newegg during Thanksgiving) instead of the Crucial m4
😉