z77 Pro3 RAM configuration

Hello there!

I've been running 2x4GB of RAM (Corsair Vengeance LP 1600 1,5V) in DDR3_A1 and DDR3_B1.

Then i ordered 2x8GB (Corsair Vengeance LP 1600 1,5V) and put it in A2 and B2.

The PC didn't boot. I switched the modules, didn't help.

I can only bring them to work with a maximum of 3 modules (of course without dual-channel) when i dont place anything in A2. A1+A2+B1 won't work, it HAS to be A1+B1+B2.

A2+B2 however works fine. All of the memory modules are intact because every one of them does run in one of the working configurations.

Questions: Is it possible to run all 4 modules (UEFI update for example)? If not, am i better up with 2x8 in dual-channel or 8+8+4 in non dual channel?

I know that the manual says the modules need to be identical, but i wanted to give it a shot.

Thank you very much!


Edited by djducky - 31 Jan 2016 at 5:09am

And FYI, per your Manual, pg20:

6. For optimal compatibility and stability while overclocking memory frequency, it is recommended to install one memory module in DDR3_B2 slot or two memory modules in DDR3_A2 and DDR3_B2 slots.

No. DO use A2 and B2.



re: 8+8+4

If you prefer your memory and computer running in Single Channel, sure. Go for it I guess. I prefer to run mine in Dual Channel using either two or four sticks.

It's all about the bandwidth Dual Channel provides. Hands down, Dual Channel for the win.

wardog wrote: Unless the games you play are more GPU-centric. But even so I'd still bench test the games first beforehand.

I still think you'll find Dual Channel provides better performance. Just how much, meh, but better nonetheless.