Ram speed incorrect in Win 8.1 system info and ASUS AI Suite

krelob · Oct 20, 2013

I have my ram speed set to 2133 in BIOS, but it still shows up in Win 8.1 system info and in the ASUS AI Suite utility as 1600. Is it possible that the ram is being underclocked once Windows starts via the UEFI bios or is the ram just reporting itself as 1600 even though it is clocked at 2133? Shouldn't this ram just be detected from the beginning as 2133 without having to manually clock it in BIOS or is that not correct?

Ram is G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-17000CL11D-8GBXL.

Motherboard is ASUS A88XM-A

CPU is AMD A10-6800K.

Software is fully updated Win 8.1 and all updated drivers installed from ASUS's web site.

Tradesman1 · Oct 20, 2013

Need to manually set it up in the BIOS or see if your mobo supports EOCP, DOCP or XMP - which are versions of DRAM setup profiles, if it has one of them, use it and select 2133, it will take the profile from the sticks and set them up for you

krelob · Oct 20, 2013

It is set to 2133 in BIOS via DOCP as described above.

Tradesman1 · Oct 20, 2013

Check it in CPU-Z, in the memory tab it should show 1066 (which is true freq, this is DDR - DOUBLE data rate - so take true rate 1066x2 to get effective = 2133

krelob · Oct 20, 2013

Listed as 1066 in CPU-Z. I suppose Windows and the ASUS utility are wrong?

Tradesman1 · Oct 20, 2013

They may well be looking at the initial boot freq of the DRAM from the SPD which is often 1333 or 1600, can see it also in CPU-Z, over in the SPD tab, the MAX Bandwidth pane, where it shows like PC3-12800 or whatever, that's actually the MAX it can boot to on initial install

krelob · Oct 20, 2013

So is this not actually PC3 17000 RAM as advertised?

Tradesman1 · Oct 21, 2013

Yes the DRAM is - but.....when initially installed it will boot to the mobos default, if it tried to boot straight to 2133 it prob wouldn't work with most all systems, many CPUs can't even run 2133, and others require a OC to to run DRAM that fast. the DRAM has a section in the SPD that defines it's preferred default so the bIOS can use it if possible, once passt the initial install, you set the DRAM to it's prpoer freq

krelob · Oct 21, 2013

OK. So it basically just defaults to a safe speed that will boot on most motherboards. Thanks.

Tradesman1 · Oct 21, 2013

Correct, DRAMs been that way for quite awhile now, it's shown up more the last 3 or so years as DRAM has developed into higher and higher freqs

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Ram speed incorrect in Win 8.1 system info and ASUS AI Suite

krelob

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