Tuning Corsair XMS3 8GB

Winston · 7 Jan 2013 at 17:43

Hi 8 Pack

Thought it best to start my own thread

Here's where I'm at

Can't get into windows at 1866mhz and bios boot loops at 2000mhz

Voltages can be seen in screeny

Winston · 7 Jan 2013 at 17:55

And my memory options in BIOS

Thanks

Ripshod · 7 Jan 2013 at 20:27

Is this the 1600C9 XMS3? CPU-Z will tell ya in the SPD tab

Winston · 7 Jan 2013 at 20:34

Yeah, they are CMX8GX3M2A1600C9

8 Pack · 7 Jan 2013 at 21:55

I will have to check stock and see if we have any at OCUK. If we do I will give em a whirl and see where I get with them.

The way to tune is get near your top frequency on the settings previously given. Then tune Cas first, then Command rate, then TRAS, then the Thirds seach one at a time . Then the seconds focusing on TRFC.

Winston · 7 Jan 2013 at 21:58

8 Pack said:
I will have to check stock and see if we have any at OCUK. If we do I will give em a whirl and see where I get with them.

The way to tune is get near your top frequency on the settings previously given. Then tune Cas first, then Command rate, then TRAS, then the Thirds seach one at a time . Then the seconds focusing on TRFC.

The previously given settings didn't quite line up with my bios settings, could you please list them again for me as need to manually slacken off my timings I think to help reach higher frequency

8 Pack · 7 Jan 2013 at 22:28

To reach higher frequencys reverse tune. so raise cas, cammand rate first. The key is to get the balance between frequency and latency.

Winston · 7 Jan 2013 at 22:31

So just leave all my secondary timings as auto? As I know higher is slacker and that'squite sstraight forward for the primary timings, but haven't a clue what to set the other timings at to begin with?

Winston · 7 Jan 2013 at 22:35

Latest effort

8 Pack · 7 Jan 2013 at 22:51

Seconds for frequency go.

tRRD 7
tRFC 296
tWR 16
tRTP 10
tFAW 30
tWTR 19
tCKE 6
tWCL 8

In the thirds leave em on auto but back out trWDR, tRRSR and tWWSR to 6 clocks.

This is really slack timings so perf will suffer.

Winston · 7 Jan 2013 at 23:08

Cool, thanks
Will set those timings and see what frequency I can reach then I'll tighten from there
Be really interested to see what you can reach with these if you manage to get a chance tomorrow
Thanks again

8 Pack · 7 Jan 2013 at 23:10

If i get chance I will Rag em!!!

Winston · 7 Jan 2013 at 23:11

Look forward to it

Winston · 8 Jan 2013 at 10:07

Confused, why has the score gone worse?

From this at 1800:

To this at 1866:

???

Because of my processor speed?

8 Pack · 8 Jan 2013 at 10:40

Yes!!! CPU speed effects the bench.

Winston · 8 Jan 2013 at 10:46

Ok great

Well where would you suggest I go from the 1866 settings I have? BIOS still won't boot at 2000 even with the slackest primary settings possible
My bios settings don't line up with the settings you provided, just a couple are listed differentl , but I'll be looking into this

Winston · 8 Jan 2013 at 11:03

Ok my BIOS lists them as so:

tRC -
tRRD -
tWTR -
tWR -
tWTP -
tWL -
tRFC -
tRTP -
tFAW -
tCMD -
tRW Stability -
tWR Stability -

So most line up but a few don't

tRRD 7
tRFC 296
tWR 16
tRTP 10
tFAW 30
tWTR 19
tCKE 6
tWCL 8

Winston · 8 Jan 2013 at 11:37

Ok think I've figured them out

You have listed tWCL which is CAS Write Latency so I figure that relates to tWL for my BIOS setting

You also haven't listed tWTP as that should be left as AUTO, as it usually needs to be tWR + tWL + 4 = tWPT, so in this case 28, but I'll leave it on AUTO and see what it sets it as

So my amended BIOS list would be :

tRC - AUTO
tRRD - 7
tWTR - 19
tWR - 16
tWTP - AUTO
tWL - 8
tRFC - 296
tRTP - 10
tFAW - 30
tCMD - 1 or 2
tRW Stability - AUTO
tWR Stability - AUTO

Nope not quite right as I haven't found where tCKE relates to....

Winston · 8 Jan 2013 at 15:38

Winston · 8 Jan 2013 at 20:50

Ok here's where I'm at now

Still confused as which setting are which when setting in my BIOS as they are slightly different than the listings on Mem TweakIt