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[Solved] 1333 and 1600 together?

Forum Motherboards & Memory : Memory [Solved] 1333 and 1600 together?

Tyan

i already own a 2 gb 1333MHz DDR3 RAM and i recently bought a 4 gb 1600 DDR3 RAM so heres my question can i use both of them together

Message edited by mosfet429546 on 01-31-2012 at 02:39:55 PM

------------------------------ Thanks for your rersponse
Reply to mosfet429546

Best answer

Well it wouldn't be anything that I would recommend, and if your MOBO is Dual Channel with 4xDIMM slots (1) stick of DDR3-1333 + (1) stick of DDR3-1600 would lead to problems either immediately of down the line with memory intensive apps.

Clearly, at best you'll need to look at CPU-z 'SPD' tab and look for an overlapping Frequency ~667 and CAS Timings and then use the worst of each; example:

DDR3-1333 (667MHz) 9-9-9-24 @ 1.50v
DDR3-1333 (667MHz) 8-8-8-24 @ 1.50v
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DDR3-1333 (667MHz) 9-9-9-24 @ 1.50v ; set the DRAM Frequency DDR3-1333 and CAS Timings.

Next, some MOBO's must have the Channels be the same size, so in the example 2GB Channel 0 and 4GB Channel 1 the end result might be 4GB total and you'll loose 2GB of the 4GB stick and so in that case simply use the (1) 4GB stick.

RAM is dirt cheap, buy a matched pair.

Q - What MOBO?
Q - What CPU?
Q - What exact stick/sets? ; provide links.
Q - What OS?

Reply to jaquith

It may be possible, especially if you use both in pairs. I don't recommend using 3 sticks on a 4 ram slot board. For mixing speed, set the speed at the slower setting in manual mode; for you 1333. Let the motherboard choose the timings. They don't have to match either spec for your ram. Then test them out with your regular programs, not memtest. If there's a serious problem, windows will let you know with a memory address (usually a bluescreen).

Reply to o1die

mobo-m4a78t-e
cpu-amd phenom x2 550be(unlocked to 4x b50)
ram-f3-10600cl9d-4gbnt pc3-10600(2gbx2-using only 1)gskill
f3-12800cl9-4gbxl-pc312800(4gbx1) gskill rip jaw
w7 ultimate x64

------------------------------ Thanks for your rersponse
Reply to mosfet429546

As I assumed, no it's not a good idea. Nothing I would do.

Q - How did you end up with 1 stick of each from both being 2X__GB Kits?

F3-10600CL9D-4GBNT - http://www.gskill.com/products.php?index=97
DDR3-1333 9-9-9-24
F3-12800CL9-4GBXL (is 1 stick of the F3-12800CL9D-8GBXL kit) - http://www.gskill.com/products.php?index=355

DDR3-1333 (667MHz) 9-9-9-24 @ 1.50v
DDR3-1333 (667MHz) 9-9-9-25 @ 1.50v
============================
DDR3-1333 (667MHz) 9-9-9-25 @ 1.50v ; set the DRAM Frequency DDR3-1333 and CAS Timings