DDR 3 ram speed

fastwunz · 27 Nov 2017 at 10:25

hi guys - a good mate of mine gave me 2 sticks 8gb of Corsair vegeance ddr3 ram yesterday. Gave it to me! Good lad. It’s 2400 MHz but my system can run up to 2133 but I’m sure the board should just clock it down to 2133 which is the max it can handle.

Anyway, it’s now in my system but pushing it anything past 1600mhz and the system won’t boot past the windows post screen.

My i5 2500k is overclocked to 4.8ghz and has been stable up to this point and the previous ram I had in the system also ran at 1600mhz - this new stuff though should be running quicker.

My board can support speeds up to 2133 and I’ve got the ram running in dual
Channel mode.

Are there any blindingly obvious things I should be doing in the bios to tell it to run quicker without it crashing my machine? I’ve gone into the bios and adjusted it to 2133 but it won’t have it

Thanks

Orcvader · 27 Nov 2017 at 14:23

SB's memory controller is actually only rated to run up to 1333MHz, but like you I had my 2600K running at 1600MHz for years.

I would be tempted to remove the CPU overclock, and see if the RAM works then. If not, try adding a bit more RAM voltage?

fastwunz · 27 Nov 2017 at 16:39

Orcvader said:
SB's memory controller is actually only rated to run up to 1333MHz, but like you I had my 2600K running at 1600MHz for years.

I would be tempted to remove the CPU overclock, and see if the RAM works then. If not, try adding a bit more RAM voltage?

Ah I see - so technically it’s the 2500k that is holding it back then?

Orcvader · 27 Nov 2017 at 17:54

It could be, which is why I suggested maybe increasing the DRAM voltage to see if it could help with stability.

Is it the XMP profile you're enabling or just the speed? Have you also adjusted the timings to the correct settings? Could try get it to boot at 1600MHz first?

fastwunz · 27 Nov 2017 at 19:29

Ok it really doesn’t like the XMP profile even after downclocking it. Won’t do anything past 1600mhz. I even need to downclock my cpu a bit to keep it stable

Weird

synixx · 27 Nov 2017 at 22:33

That's unusual I have a 2500k running at 4.2GHz with 2133Mhz RAM (rated 2400Mhz). Timings on my rig are 9-9-9-28 so pretty decent timings too. That's on an MSI P67 mobo. Have you tried manually setting the timings and voltage?