[Acoma_Andy]

This mobo has a ton of features, and I'm still testing what it can do. Here's the memory OC I got so far, and any input on the settings is appreciated.

G-Skill PI PC8800 @ 1130mhz
5-5-5-15 @ 1.94v
Dram termination 0.97v
TRFC @ 58, the rest of the subtimings at "auto"
Driving strength profile @ 1066
DDR write training - disabled
Extreme memory profile - disabled
Static tRead Value (Performance level) - 11

This setting is 100% memtest stable. Any input is welcome.

 

[DeadSkull]

What memory strap are you using?

 

[Acoma_Andy]

Quote:

Originally Posted by DeadSkull What memory strap are you using?

Oh yeah, haven't mentioned that. I'm using the 333 strap with 2.40B multiplier.

 

[DuRoc]

Can you post an everest read/write screen to see what king of bandwidth that gives you?

 

[Acoma_Andy]

I don't have Everest, but I'll download it and take a look.

 

[MasterKromm]

tRFC @ 58 and PL @ 11... Those are pretty loose timings, how bout bumping up voltage(dram and mch) a little and seeing if you can't drop PL down(tRFC isn't as important; maybe set it to 60) or if you're after more mhz keep timings where they are now and boost v + freq.?

dram v: 2.0-2.1
mch core v: 1.2-1.25

 

[Acoma_Andy]

Have already tried 1140mhz @ 2.0v. No go. But I believe that was with performance level 10 and driving strength profile at 1200.

The MCH voltage is already at 1.22v.

 

[MasterKromm]

That PL10/11 is killing performance...

Attachment 100349

Quote:

Have already tried 1140mhz @ 2.0v. No go.

G.skill does bin their kits "all mad crazy", it's entirely possible that's the best your sticks can do... You could try OCing them individually. However, I'd focus on reigning in PL, that should boost clock for clock performance nicely.

-EDIT-

You can download memset to play with some subtimings(PL) from within windows...

http://www.overclock.net/downloads/304459-memset.html

 

[Acoma_Andy]

Quote:

Originally Posted by MasterKromm That PL10/11 is killing performance... Attachment 100349 G.skill does bin their kits "all mad crazy", it's entirely possible that's the best your sticks can do... You could try OCing them individually. However, I'd focus on reigning in PL, that should boost clock for clock performance nicely. -EDIT- You can download memset to play with some subtimings(PL) from within windows... http://www.overclock.net/downloads/304459-memset.html

Ok so, how about I stay where I am and test lowering the performance level?

Yes I know memset, but I don't really like using OC tools in an OS. Is it that good? Can it stress test and such?

 

[MasterKromm]

Quote:

Originally Posted by Acoma_Andy Ok so, how about I stay where I am and test lowering the performance level? Yes I know memset, but I don't really like using OC tools in an OS. Is it that good? Can it stress test and such?

I usually don't either. But I have experimented with lowering PL a click at a time within windows then benching and testing with memtest and have yet to kill any components(knocks on wood). But yeah, I'd definitely stay where you are now, PL7/8 should be doable and translate into a nice performance boost(BW, PI times, ect).

-EDIT-

Personally, I use windows memtest since it's convenient. GL with the tweaking!

 

[Acoma_Andy]

Is there any other things I can chance to gain a few mhz perhaps?

Like for example, should I set all the sub timings to their max?

 

[MasterKromm]

Quote:

Originally Posted by Acoma_Andy Is there any other things I can chance to gain a few mhz perhaps? Like for example, should I set all the sub timings to their max?

Hmmm, maybe, perhaps another G.skill PI 1100mhz owner can come help you? AFAIK your modules sport Promos ICs and my Patriot Viper series is PSC based... They handle a little differently, PSC seems to scale slightly better(It's hit or miss though, my second kit doesn't like anything beyond 2.1v

) with voltage than Promos. I can run my voltage friendly kit as high as 1164mhz PL6 on the 266 strap, but that required 2.2v. Your kit typically takes 1.8-1.9v to do the same.

You might have some luck finding another users settings in this thread too...

http://www.xtremesystems.org/forums/...d.php?t=205132

GL, wish I could help more but I never loosened subtimings to the max, in fact I never run PL above 6. It slaughtered clock for clock performance and that's one of my peeves.

 

[Acoma_Andy]

Ok, yes I've read that thread before, I'm a frequent visitor of xtremesystems.

I just dropped the PL from 11 to 8, and it's 100% stable. 7 did not boot.

Also raised mem voltage from 1.94v to 1.96v, and set TRFC from 58 to 60.

 

[Acoma_Andy]

New results:

Dropped DRAM voltage to 1.92v
Enabled DDR write training.

Give some input if you can

 

[Acoma_Andy]

Up.

Lowered TRFC from 60 to 52. Planning to mess around with DIMM 1 & 2 Clock Skew whatever that does

 

[MADMAX22]

Try running the 2.40D or whatever the edquivelent is. I tried that and was getting PL 9 instead of 10 or 11. Got better performance for some reason as well.

 

[Acoma_Andy]

Quote:

Originally Posted by MADMAX22 Try running the 2.40D or whatever the edquivelent is. I tried that and was getting PL 9 instead of 10 or 11. Got better performance for some reason as well.

Is 2.40D better then B? And I'd have to use the 400 MCH strap right?

Also, I'm at PL8 now. I just went into the bios and set DRAM Performance enhance to [turbo] and gained another 100 mb/s copy speed

Also entered the following sub-timings: 4-4-8-52-4.

 

[DeadSkull]

Back to low fsb, high mem speed. Too bad I didn't notice anything on DIMM Clock skew over at xs.

/edit: Try the following for Channel A/B driving settings
Drive Strength Profile : OC-1200

Seems to help with stability, finally got 585 Mhz stable, fighting for 590 now.

 

[Acoma_Andy]

Quote:

Originally Posted by DeadSkull Back to low fsb, high mem speed. Too bad I didn't notice anything on DIMM Clock skew over at xs. /edit: Try the following for Channel A/B driving settings Drive Strength Profile : OC-1200 Seems to help with stability, finally got 585 Mhz stable, fighting for 590 now.

Thanks. Was running the 1066 profile because I noticed "no difference".

When I get home I'm going to try and break 1130. Here's a few things I had in mind:
- MCH strap 400
- Memory multiplier 2.40D
- MCH voltage 1.30 (it's at 1.26v now)
- DRAM termination, Channel A/B ref., MCH/DRAM ref all to 50% of the DRAM voltage
- DRAM voltage up to 2.0v, above voltages up to 1.0v.
- MCH clock skew 50ps

On the other hand, most people seem to use the 333 strap

 

[DeadSkull]

Argh...managed to gain some ground at 1180 in IBT but p95 fails in a min?!?!

Feels like 1170 is the max these sticks can do.

Also I haven't been able to see any difference inbetween MCH Clock Skew of 0ps and 50ps, I'm guessing that it only becomes important with really high fsb.

If you are going to use the 400 / D strap then the only multiplier options that will be available are:
2, 2.66, 3.