F3-2133C9D-16GXH timings for 2133 with EVGA Extreme3 Gen3

[Rangoon]

I am hoping someone here can help steer me in the right direction with my timings. I know my mb isn't on the official qualified motherboards list for this RAM, but the Extreme 4 is, and the RAM seems to be working fine at XMP timings.

I'm just not sure which way to move my timings with regard to the tRFC and DRAM/VTT voltages.

Here is what I have so far, which is slightly modified from the XMPs, and seems to be stable. I still need to run another overnight check with Prime95.

DRAM 1.642 volts
VTT 1.168 volts
tCL 9
tRCD 11
tRP 11
tRAS 31
CR 2
tWR 16
tRFC 183
tRRD 6
tWTR 8
tRTP 8
tFAW 25
tCWL 7

The tRFC seems touchy. I was reading here that base for RFC should be around 175, but that the OP in that thread wound up with 179. Should I relax the RRD/WTR/RTP and tighten RFC? Or just keep RFC at 183 since anything below that is unstable? Or should I be pushing voltages further? I had tried DRAM 1.7 and VVT 1.2, but never found timings that were stable along with those voltages.

My i2500K is at 44x100 and offset +.005 volts, and was stable with my previous Ripjaw 8GB kit.

Thanks.

[Tradesman]

I think you're looking good - those are nice and tight, tRFC will vary from mobo to mobo as well as depending on the overall config...appears/sounds like you have it tight now...If Prime is good I'd ride as is...think your real options as far as increasing performance would be to loosen up tRFC ((about +7), tRRD, tWTR and tRTP (+ 1 each) and see if you can tighten the CR to 1 or the CAS to 8 (best bet would prob be the CR which may also require a tad more VTT or DRAM voltage)....

[Rangoon]

Thanks for your insight, Tradesman. Unfortunately, Prime did not do so well. I had it running pretty well the night before, got a little over 8 hours error free on all workers, but had set tRRD at 7 and tRTP at 27. Do you think that could make such a difference? On two workers, I only got an hour and 43 minutes last night, while one went about 9 hours and the fourth was still going strong after nearly 20.

Now I'm going for stability, I guess, probably without much hope of bringing CR down to 1. Do you think more voltage would help? or just relax those two timings back to 8/27?

[Tradesman]

Do you mean the tFAW to to 27, tRTP typically seldome takes more then 11 or so...can give it a try. maybe VTT to 1.2 and give the VCCSA a bit of a kick 1.1 to 1.14 or so

[Rangoon]

I absolutely did mean tFAW, sorry for the confusion.

For some reason, upping the VVT and VCCSA worsened my Prime test. I backed each of those off a little from 1.2 and 1.1X respectively, then loosened the RFC to 184 and FAW to 26. Will check with Prime again this afternoon.

[Tradesman]

Will be installing a net today, so I'll be back in the PM, will keep fingers crossed

[Rangoon]

The adjustments I made from the post above are looking good so far. 6 hours error free. I will run more Prime tonight, and maybe just leave well enough alone if things are stable.

Thanks again for your help, Tradesman.

[Tradesman]

Glad to help, keep in touch

[Rangoon]

In case this might help someone else, I just wanted to update here that I did get stable as of the last configuration mentioned. I ran Prime95 for over 24 hours error free. i know that doesn't mean 100% stability, but it's pretty good and haven't had any issues while operating.

[Tradesman]

Pretty good for being stable, Enjoy!