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Pliskin said:
I dont get any debug code?! I just try and boot into W7. I tried the LB14 setting and nowt. I think I will stick to 2200Mhz for now until I can find out some further info on this

Thanks for your help 8 Pack :)
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No problem. That problem may be your VCCIO setting. Have you adjusted this at all for the new setting. DDR2400 GSKILL as an example suggest 1.25v although I doubt you will need this. Try 1.20v.
 
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8 Pack said:
No problem. That problem may be your VCCIO setting. Have you adjusted this at all for the new setting. DDR2400 GSKILL as an example suggest 1.25v although I doubt you will need this. Try 1.20v.
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What VTT/VCCIO is needed for a 3930k?

Sometimes I get cold boot issues if it's not set to 1.2V.. But I have not tried lower yet.

I'm at 2133mhz @ 27-10-11-9 1T

I think It's this UD3 that's holding me back, It has some REALLY BAD Vdroop issues.
 
X79 1.25v is the recomended value for compatability with DDR2133 mate, IMC on IVY is much stronger than SB-E. You can tune this down though, it all depends on your IMC.

Remember VTT is also needed on X79/SB-E for memory stability. This is usually around 1.2 - 1.25v again to ensure compatibility.
 
I think my board is RUBBISH. I can prime, memtest all day @ 2133mhz @ 1.1 volts on the VTT etc, but as soon as I shut down or reboot at the same settings is instantly fails prime after its just did an hour on the same settings.
 
8 Pack said:
X79 1.25v is the recomended value for compatability with DDR2133 mate, IMC on IVY is much stronger than SB-E. You can tune this down though, it all depends on your IMC.

Remember VTT is also needed on X79/SB-E for memory stability. This is usually around 1.2 - 1.25v again to ensure compatibility.
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I would be careful about 1.20v+ with the 3930K C2 chips though. Those over at xtremesystems have had a load of 3930Ks degrade very quickly at 1.25v
 
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Well I have just done a run at 1.07v on the VVT and it seems stable at that, I think the failing prime instantly is a software issue, as it will run lynx, memtest etc perfectly fine, then load prime up and it works?
 
So I decided I couldn't get 2400Mhz out of my Green's but instead concentrated on tightening my timings at 2200Mhz.

Heres what I have now:
Just spent about 1hr 30mins testing new timings and tightening things up.

2200Mhz @1.55v 9-10-10-19 1T

AIDA64 reports
READ 24105 MB/s
WRITE 22823 MB/s
COPY 26761 MB/s
LATENCY 33.8

Super_Pi completes in 7mins 28secs

Do you think thats good :)
 
Rossi~ said:
I would be careful about 1.20v+ with the 3930K C2 chips though. Those over at xtremesystems have had a load of 3930Ks degrade very quickly at 1.25v
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I am quoting a memory manufacturers spec mate here. They suggest this for compatability with evan the weakest memory controllers. Intel spec is actually way higher to be honest!!!

As usual run the lowest that is stable!!!! VTT and VCCSA are very important on X79 with four channels for IMC to deal with.
 
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been tweaking today, got 2133mhz @ 1.05 VTT & 0.94 VCCSA (IMC)

Timings are now @ 9-10-10-21 1T @ 1.56v
 
nice :)

anyone else get any random effects when mem pushed too hard ? for instance - at 2200 CAS10 - everything seems ok, memtest86 etc, stresstests yet I keep getting 1HDD disconnecting with Error 51 errors .... only get them at that memory setting, go back to CAS11 and no issues
 
Buckster said:
nice :)

anyone else get any random effects when mem pushed too hard ? for instance - at 2200 CAS10 - everything seems ok, memtest86 etc, stresstests yet I keep getting 1HDD disconnecting with Error 51 errors .... only get them at that memory setting, go back to CAS11 and no issues
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To be honest, no matter what stress tests you run etc, it doesn't tell the whole story of stability, the true stress tests are using the computer normally as you would.
 
8 Pack said:
Yup!!!! I know a couple of manufacturers using this IC at a XMP of 1.65v!!!
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As i thought, just wanted confirmation. Cheers :)

Buckster said:
mmm and there was me trying to keep below 1.5V lol !

even without heatspreaders ? (I know normally they do pretty little anyway)
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Yep, even at 1.62 these are cool. DDR3 doesn't really need heatspreaders unless you're an extreme overclocker pushing 1.8v+.
Makes me chuckle when people watercool them and don't push them.... waste.
 
I cant disclose which manufacturers use which IC's. I have been specifically asked this by the manufacturer them selves.
 
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