Two RAM sticks working on different frequencies, even though they shouldn't

fauxpride

Distinguished
Feb 17, 2013
15
0
18,510
Hi,

System:

CPU: 3770K
Mobo: Maximus V Formula
PSU: Corsair TX650M

I first bought the system with a 1 x 8GB DDR3 Kingston HyperX 10th Anniversary Series, @1600MHz, CL9 (the silver ones)

I've now gotten a new stick which is Kingston HyperX Savage DDR3, 1x8GB, 1600 MHz, CL 9 (the red ones).

I've mounted the second stick so that the system works in dual channel mode, and it does. However, the newer stick works at 1333mhz. I've tried setting the XMP profile from the UEFI to 1600, and it's still the same.

The new stick shows that it has a profile for 1600mhz, but it just won't work - any ideas on how to fix it?

SPD screenshots from both sticks below:

https://www.dropbox.com/s/9b6vm01tmqhef2c/one.jpg?dl=0
https://www.dropbox.com/s/kzv6rd8ngtciqzi/two.jpg?dl=0


 
Solution
Take a look in the memory tab, that's what both sticks are running at (and it shows true freq so take that times 2 for effective rate i.e. 800 x 2 = 1600 effective since it's DDR (DOUBLE data rate) - the SPD tab simply shows the SPD programming of the sticks, not what they are running at ;)
Getting two different sticks of ram to work together is problematic at best. I doubt that you would notice a difference even if you could get them to run at 1600MHz. Key word here is "notice". you might see a difference in benchmarks, but real world computing & gaming, not so much.
 

Tradesman1

Legenda in Aeternum
Take a look in the memory tab, that's what both sticks are running at (and it shows true freq so take that times 2 for effective rate i.e. 800 x 2 = 1600 effective since it's DDR (DOUBLE data rate) - the SPD tab simply shows the SPD programming of the sticks, not what they are running at ;)
 
Solution