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z77 Pro3 RAM configuration

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djducky View Drop Down
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    Posted: 31 Jan 2016 at 5:08am
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
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wardog View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 5:26am
Mixing modules,, ie unmatched, usually doesn't work as you've now discovered.

Stay with the matched kit of 2x8 IMO.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 5:29am
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.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djducky Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 5:45am
Thanks for the answers. Since i don't overclock the memory it's fine but i will keep that in mind or just use a2 and B2 when i'm switching them again. So you think it is better to run 8+8 in dual chan rather than 8+8+4 in non-dual-chan?

Thank you again!


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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 10:54am
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. Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djducky Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 11:10am
Thanks again for the answer. Well, of course i do not prefer single channel but the question here is: 16GB in DC or 20GB in SC? What i do the most is gaming and some video editing, with both i don't even really have a problem with 8GB. I upgraded mostly for Planetside 2 and some future titles.

CPU is 3470@3,6 Ghz btw.

My speculation is that i wouldn't notice any difference either way, but hey... the experts are here. :)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 11:35am
It's all about the bandwidth Dual Channel provides. Hands down, Dual Channel for the win.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 11:37am
Unless the games you play are more GPU-centric. But even so I'd still bench test the games first beforehand.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 11:39am
Originally posted by wardog 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.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2016 at 11:41am
Video editing, no choice. Dual Channel for the bandwidth. No choice, no question. Period.
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