Different memory speeds on my PC

shaka85

Honorable
Jul 29, 2013
9
0
10,510
Hi to everyone

I just finish a 3DMARK benchmark and watching the results I note this:

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I have a 1333 memory and the other is 1600. They are working on dual channel? Both are in the same color modules.
 

Saberus

Distinguished
They would be running dual channel, but the 1600 module has stepped down to 1333 to match the slower part. When queried it will still run off it's designed speed. A step or two down won't exactly harm a DIMM most of the time, but beyond that you might find it starts to glitch. It isn't recommended to mix speeds, as there is a big chance of instability.
 

Tradesman1

Legenda in Aeternum
FutureMark looks at the DRAMs default boot spec from the SPD of the sticks, which doesn't really mean anything, it's simply info from the sticks SPD, to find what your sticks are running at look at CPU-Z (free app) in the memory tab, take what shows in Freq times 2 as this is Double Data Rate (DDR) so if it shows 667 you are running 1333, if it shows 800 you are at 1600, etc