Sign in with
Sign up | Sign in
Your question
Solved

Underclocking Ram, tightening timings

Last response: in Memory
Share
August 1, 2013 4:30:25 PM

I recently changed my MB + RAM and kept my processor. For the MoBo I got a GB 970A-UD3, with a 2x4GB kit of G.Skill Snipers @ 1866Mhz with 9-10-9-28 timings.

Since my processor is a Phenom II 945, which is AM3, the memory controller isn't supposed to go beyong 1333MHz. So I'll leave the frequency headroom for when I change my CPU, and in the meantime I intend to underclock the RAM to 1333 and tighten the timings, as I've read that Phenoms get some benefit from this.

I have moderate CPU overclocking experience, but underclocking and playing with timings is new to me. I've been playing around and I've adjusted the timings down to 6-7-6-19 and it's been stable, but it's all been a shot in the dark as I'm not really sure of what I'm doing, so I figured asking the fellas at Tom's.

Main question is: Is there a way of knowing the timings my RAM can take at that lower speed, or is it a matter of trying? Any rules of thumb I should follow? (For example, tried 6-6-6-18 and failed to post).

Second question: Am I OK leaving all other timings for auto adjustment by the BIOS? Cracking those 4 numbers is already complicated - or what would you suggest?

Bonus question: After I achieve satisfying timings, when I overclock the CPU (all this has been at stock frequency for CPU and everything else), can I leave those timings as long as I stick with the 1333MHz?

Thanks a lot guys. If I've left out any useful info just let me know. Cheers.
a c 279 À AMD
a c 2132 } Memory
August 1, 2013 5:28:43 PM

start with 7-8-7-27 and get that stabilized, then try tightening down further, leave DRAM at 1.5 till achieve best Underclock then can try (and will prob be able to) and lower DRAM voltage
m
0
l
August 1, 2013 5:48:16 PM

Tradesman1 said:
start with 7-8-7-27 and get that stabilized, then try tightening down further, leave DRAM at 1.5 till achieve best Underclock then can try (and will prob be able to) and lower DRAM voltage


I've already achieved 6-7-6-19, stable. Am I near the edge then?

This MoBo has been a very solid overclocker, I've been able to push both the CPU and GPU quite beyond what I could do with my previous one (which was a ASUS M3N78-Pro).
m
0
l

Best solution

a c 279 À AMD
a c 2132 } Memory
August 1, 2013 6:25:01 PM

You're looking good, Congrats! can possibly take it a little more if you want, are you still at 1.5? If so two options for additional boost....one is obvious - even tighter on the timings - but with what you have already, think I'd suggest tightening the CR (Command Rate/Timing) which is probably at 2T or 2N depending on whether your mobo uses the N or T designator -try it at 1T or 1N, should provide a nice boost, but may need a little extra DRAM voltage or MC (memory controller) voltage, think it's the CPU/NB on your mobo
Share
!