New computer build, can't set RAM to 2133MHz

JoshComm · Jun 23, 2014

I just finished building my first computer. Took some work, but it is finally up and running. However, it seems that my RAM will not work at 2133 MHz, as it is labeled for. When I manually set the speed in the UEFI manager, the computer will start, but won't even let me get to the BIOS screen.

My specs:

AMD A10-7850K 3.7 GHz
ASRock FM2A88X Extreme 4+
G.Skill Ripjaws X Series 8 GB DDR3-2133 MHz

I've tried to mess with overclocking the CPU, changing the voltage on the RAM, and various other things. Does anyone have any idea on what I may be missing?

heyu291 · Jun 23, 2014

if ur memory is 2133, you should be able to use spd or xmp to set it to that speed automatically. I believe the problem ur having, is because when the memory is set to lower speeds automatically, the memory timings are much tighter at the lower speed. when u manually set a speed u must also manually change them memory timings to match that speed. I am not sure on ur mobo, how to use the memory's internal spd or xmp profile, to automatically set the memory timings and speed. On my mobo's bios, I had to enable x.m.p. memory profile 1
yours may be xmp or amp, depending on weather ur memory's spd chip was made by intel or amd, note: xmp dose work with amd proc's

Memhorder · Jun 23, 2014

I think XMP is an intel thing. You have to tap in the Latency timings in BIOS. They should be on a sticker on the modules.

heyu291 · Jun 23, 2014

xmp is intel, but that mobo supports it, even tho it's an amd board. due to the fact that many memory don't have amp yet, and I just looked up his board and his memory. his memory has xmp only, so with that board he should be able to enable xmp with no problem

Tradesman1 · Jun 23, 2014

Try going into BIOS, enable XMP, select 2133 and raise the CPU/NB voltage to 1.2

JoshComm · Jun 23, 2014

CPU/NB voltage is already pre-set to 1.35. Should I try it higher? (Booting with just an XMP profile selected doesn't work, BTW)

heyu291 · Jun 23, 2014

first set everything else to stock, don't oc ur proc and mem at same time. get the mem timing at 2133, then work on proc oc

JoshComm · Jun 23, 2014

I have messed with the timings for an hour, and still nothing. It won't even boot up at 1866 MHz. Only at the "auto" motherboard selection of 1333 MHz, or 1600 if I choose that.

heyu291 · Jun 23, 2014

kinda sounding like u got some bad ram, or mother board, might b time for some rma's for some new ones. after looking up ur board n ur ram, u should b able to set ur ram to xmp memory profile n b done with it, no need to manually set anything.

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