Why won't my RAM overclock?

thewanted

thewanted

thewanted

Soldato
Joined
27 Jul 2007
Posts
6,520
Hi all,

I just built a new PC with these specs:

i7-4770K @ 4.5GHz
Gigabyte G1.Sniper M5 motherboard
Corsair AX860 PSU
Sapphire 7850 OC edition (for now...)

The RAM I am using is from my previous build:

4 x 4GB Kingston ValueRAM KVR1333D3N9K2 DDR3 DIMMs (datasheet)

This RAM does 9-9-9-24 at 1333MHz, but these guys were able to get theirs to run at 1600MHz @ 9-9-9-27 quite easily.

I spent ages last night upping the DRAM voltage up to 1.65v, and each time the machine would BSOD under load. I've not changed any voltage settings for "SA" or CPU IO Analog/Digital because I don't understand what they are, or their limits.

Does anyone have any tips to get this cheapo RAM running at 1600MHz CAS9?

Thanks :)
 
Since you have all 4 of your DIMMs occupied the problem may very well be the CPU IMC (Integrated Memory Controller), since it puts a much heavier strain than just 1 or 2 sticks of memory.

I'd try each stick individually first to see if they run 1600mhz 9-9-9-27 all right. If they do then try all 4 sticks and up the VTT voltage a notch or two. If it still won't do it then you might just have a weak IMC.
 
Thanks steve258. I'll see what happens with each stick individually.

I'm not so sure that I've seen VTT in the BIOS, but I'll have another look tonight :)

EDIT: Just to clarify, are you saying I should increase VTT and leave the DRAM voltage at the default 1.5v?
 
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Have a play with them both :) dram voltage sometimes does more harm than good though; mine for example won't do anything over 1.55v without BSOD, more dram voltage just makes it BSOD quicker so I left mine at stock.
 
steve258 said:
Have a play with them both :) dram voltage sometimes does more harm than good though; mine for example won't do anything over 1.55v without BSOD, more dram voltage just makes it BSOD quicker so I left mine at stock.
Click to expand...

That's interesting :) I think I did notice it BSOD quicker with 1.6v, but the fact that it was BSOD'ing at all just made me rage so I'm entirely sure if that's true.

Thanks for the help :)
 
that ram should support xmp memory profile in the bios? it sets up correct ram speed/timings/voltage for you

with 16gb you might also need a touch more cpu/vtt voltage from stock 1.05v you might need 1.10v (1.2v is max safe) and xmp wont adjust cpu/vtt
 
If I open XMP it lists all the top-end RAM sticks like the GSkill 2666Mhz etc. ValueRAM doesn't feature in the list :(

I'll give VTT a try, if I can find it :)
 
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