If my motherboard only supports minimum DDR3 1066MHz ram and I have 639.9 MHz ram, will it work?

I'm going to upgrade my PC to a newer MB, but not my RAM. One allows the following frequencies: DDR3 1066/1333/1600/1866*/2000*/2133*/2200*/2400*/2600*/2666*/2800*/3000*/3100*/3200*/3300*(*OC) MHz, while the other is currently running at 639.9 MHz.

Will they be compatible?

josh

Posted 2016-01-22T20:23:05.637

Reputation: 101

if the motherboard has a minimum requirement, probably not – Keltari – 2016-01-22T20:26:45.803

DDR3 does not even support that frequency. – Ramhound – 2016-01-22T20:30:31.710

@Ramhound Why does the website say 400MHz, then? http://www.crucial.com/usa/en/ct102464ba160b Could it be wrong?

– josh – 2016-01-22T20:31:26.790

Make up your mind. Your question indicated, 639.9 MHz, now your something else entirely. – Ramhound – 2016-01-22T20:32:21.903

Well that's what Speccy says I'm running. http://www.gigabyte.com/products/product-page.aspx?pid=3449#sp Is my current MB at the moment.

– josh – 2016-01-22T20:33:04.453

The new motherboard specifically highlights that DDR3-1600 memory is supported The only question should be, is does the new motherboard support UDIMMs, and my educated guess would be it does indeed. The module is simply, Unbuffered and NON-ECC, which most consumer boards use anyways – Ramhound – 2016-01-22T20:33:57.770

I have no idea where they are getting 400 MHz from DDR3-1600 does not run at 400 MHz. I can't figure out how you get 639.9 Mhz – Ramhound – 2016-01-22T20:40:22.867

@Ramhound - Not sure if this means anything to you - http://valid.x86.fr/0qnfah - DDR-SDRAM frequency 639.9 MHZ Ratio 3:8, timings 8-8-8-23-31-1 (tCAS-tRC-tRP-tRAS-tCS-tCR)

– davidgo – 2016-01-22T20:44:08.077

That is the CPU's memory frequency. I am talking about the frequency of the memory. But the disparity is explained all the same – Ramhound – 2016-01-22T20:45:58.890

If my motherboard only supports minimum DDR3 1066MHz ram and I have 639.9 MHz ram, will it work?

Answers