First of the reason for the 770 chipset motherboard I feel the 790 chipset is to expensive for what I need. I am not looking for crossfire now or later. I also I need a board <80 dollars. This motherboard also looks like it has enough overclocking ability from the newegg reviews.
My question is will this motherboard work with this memory? I look used for memory compatibility on the ocz website for this exact motherboard and it only return memory with DDR3 1066. From newegg spec. I notice it say 1600 O.C so I guessing the motherboard will have the ability to handle 1600 after O.C. From what I read about OCZ obsidian in the newegg review, you need to overclock it anyway to get it the spec listed.
Well, it should work, AM3 CPUs only officially support up to 1066/1333MHz for DDR3 RAM, but you can run it higher, on ASUS's website, it can run at 1333MHz or below natively, and up to 1866MHz overclocked. So really you should be fine - AMD CPUs prefer to have lower voltages for their IMCs, but 1.65V is ok. I'm just supposing that when you put the sticks in, it'll only run at 1333MHz or similar, and to get any more performance, you'd have to o/c it. Generally, RAM works if it fits, unless it is specified to be P55 chipset only, which some DDR3 1.65V kits are. On newegg, I saw a review of a guy running those sticks on his 790X motherboard, you really should be fine.
Well if I can chime in, I just purchased the M4A77TD AM3 board for my AMD955BE processor with DDR3 1333 memory and it works fine, the motherboard actually supports 1600Mhz (OC) and 1800Mhz (OC), tried also Patriot Viper 2000Mhz memory and the Mobo detects it and runs but I didn't fully test it. So you shouldn't have an issue with memory. Also Crucial makes faster memory at 1333Mhz with 6,6,6,20 Timing. Very fast where memory is involved.