RAM compatability

Rinaldinho · 7 Sep 2011 at 20:34

Hi all

At the moment I have 4gb of ram installed on my system and I would like to have 4 more. The prob is the ram i have is no longer available at OC:

Corsair Dominator 2x2GB DDR3 PC3-12800C9 1600mhz Dual Channel Kit

My mother board is an ASUS M4A78LT-M and I'm not sure which sets of RAM are compatible or recommended.

Any help would be appreciatted.

Thanks

Plec · 7 Sep 2011 at 21:26

Your present memory runs at 1600MHz, 9 9 9 24 timings and between 1.6 and 1.7V.

If your memory can run at >1.65V (very likely) at the above settings then the Corsair XMS3 - link - should play nicely with the Dominators - plus there on a this week special.

The timing and frequency match but the recommended voltage is slightly under 1.7V @ 1.65V - but your present dominators will probably run at 1.6V or at least 1.65V.

Rinaldinho · 7 Sep 2011 at 21:36

Thanks Plec

I have an AMD Athlon || X4 Quad Core 640 3.00 Mhz, will the recommended memory by compatible with this cpu as well?

Thanks

Plec · 7 Sep 2011 at 21:43

It shouldn't be an issue - the XMS3 has been installed in most flavours of motherboard as it's very popular, quality memory (and cheap at present).

If you run into trouble installing it post back - there's always someone lurking about who will help.

Oh, and welcome to the forums.

Rinaldinho · 7 Sep 2011 at 21:48

Thank you very much

One last thing: Will the XMS3 cause any problems in conjunction with my current memory? Or will I have to remove it and just use the XMS3?

Once again thanks for your quick and helpful advice

Plec · 7 Sep 2011 at 21:56

You will need to test that your present memory will run at between 1.6V -1.65V as the XMS3's maximum recommended voltage is 1.65V.

I'm confident that the Dominators will run at this voltage but no guarantees of course - confirm this by running memtest for a few hrs.

If it can run at >1.65V then you will need the following timings and voltages to marry the memory to each other (they're almost identical):

Command Rate 2T
9, 9, 9, 24 - timings
voltage >1.65V]

Rinaldinho · 7 Sep 2011 at 22:59

yeah I'll run the test overnight.

However I just checked the voltage with CPU-Z. There are 4 different columns with different voltages:

JEDEC #1 -> 1.50V
JEDEC #2 -> 1.50V
JEDEC #3 -> 1.50V
XMP-1600 -> 1.650V

I believe the last one is the most relevant?

Thanks

Plec · 7 Sep 2011 at 23:06

Yes the XMP is the value for the memory running at optimum spec/1600MHz so you're current memory matches the XMS voltage too.

You're good to go...

Rinaldinho · 8 Sep 2011 at 09:34

Thanks again Plec.

Will place the order now

Plec · 8 Sep 2011 at 13:13

No problem - if you run into problems trying to get all 4 sticks running, post back.