QPI voltage for 2000MHz 6GB memory

[icecpu]

What QPI voltage I need to set to have memory running stable at 2000MHz ?? I have 6 GB corsair dominator GT (8-9-8-24)

[OhNoes!]

What QPI voltage I need to set to have memory running stable at 2000MHz ?? I have 6 GB corsair dominator GT (8-9-8-24)

There's no magic figure. Also you don't state what what your settings are. The short answer is: whatever you need to be stable. You just have to go trial and error.

[icecpu]

There's no magic figure. Also you don't state what what your settings are. The short answer is: whatever you need to be stable. You just have to go trial and error.

21 mutiplier
166 bclk
memory spec is 8-9-8-24 2000MHz
should I start at 1.35

[kill_a_wat]

harder I think with the normal i7s as the max VTT threshold is 1.35 and the required 2xDRAM uncore ratio

But yes as stated above it all depends on your specific system

[Chrysalis]

1.35v seems a very high starting point, I am no overclocking expert but default is 1.10 and max absolute limit is 1.4 but 1.4 is also mentioned a spike limit rather than 24/7 limit.

[donmarkoni]

1.35v seems a very high starting point, I am no overclocking expert but default is 1.10 and max absolute limit is 1.4 but 1.4 is also mentioned a spike limit rather than 24/7 limit.

1.35V is not high starting point for 2000 memory / 4000 uncore. I'm not saying that he might end up lower than that, but it's unlikely.
Default for i7 is 1.2V VTT and according to Intel's specs absolute max is 1.35V for i7 900 series and 1.4V for i7 980X.
If everyone would stick to it, nobody would run memory at 2000+MHz.
Just as example, I'm using 1.4125V VTT (QPI/DRAM) for my 24/7 setings 2000 mem/4000 uncore.

[zsamz_]

1.35V is not high starting point for 2000 memory / 4000 uncore. I'm not saying that he might end up lower than that, but it's unlikely.
Default for i7 is 1.2V VTT and according to Intel's specs absolute max is 1.35V for i7 900 series and 1.4V for i7 980X.
If everyone would stick to it, nobody would run memory at 2000+MHz.
Just as example, I'm using 1.4125V VTT (QPI/DRAM) for my 24/7 setings 2000 mem/4000 uncore.

spd on my hyperx sets qpi to 1.6v lol
i need 1.42v
intel specs

[donmarkoni]

spd on my hyperx sets qpi to 1.6v lol
i need 1.42v
intel specs

That's what I'm talking about! If we all followed specs, Xtremesystems wouldn't have reason to exist.

[Chrysalis]

ok forgot he using i7 soi higher default

as I said I am no expert on overclocking

[Leeghoofd]

Jeez guys stop listing these silly Intel specs and/or stop OC'ing in the hunt of 2000mhz ram and 4000 uncore... or more... If you don't want to go beyond specs, settle for a milder overclock then...

Corsair XMP/SPD/Whatever makes you tick, for the earlier Hypers set 1.65 QPI, OCZ Blade same... start at 1.45 and see if you can go lower... been running 1.4 for ages now on my I950... nothing has been hurt... (just one Blade dimm, bit the dust :p)

Each CPU/mobo/ram combo is different, it's trial and error... if you don't want to go beyond Intel specs settle for a lower speed with tighter timings/B2B...

[cstkl1]

Jeez guys stop listing these silly Intel specs and/or stop OC'ing in the hunt of 2000mhz ram and 4000 uncore... or more... If you don't want to go beyond specs, settle for a milder overclock then...

Corsair XMP/SPD/Whatever makes you tick, for the earlier Hypers set 1.65 QPI, OCZ Blade same... start at 1.45 and see if you can go lower... been running 1.4 for ages now on my I950... nothing has been hurt... (just one Blade dimm, bit the dust :p)

Each CPU/mobo/ram combo is different, it's trial and error... if you don't want to go beyond Intel specs settle for a lower speed with tighter timings/B2B...

b2b
qpi slow mode
been running 1.55 for 6 months

[kill_a_wat]

That's what I'm talking about! If we all followed specs, Xtremesystems wouldn't have reason to exist.

I didn't mean to imply to never go over Intel specs. I am of the belief though that for daily non-record braking clocks why would you need 4000+ uncore with 2K+ RAM when you can easily go with ~1.6Ghz tight B2B etc at a SIGNIFICANT volt drop. Of course depends on your specific hardware. Just my opinion when it comes to usual o24/7/usual ocs. All subjective IMO

[icecpu]

I can't get it to boot up with memory 2000Mhz,
I have tried up to 1.45 QPI
should I go higher QPI or something ??


my memory is the corsair dominator GT 6gb 2000Mhz 8-9-8-24

[Leeghoofd]

How high is ya uncore ? QPI ? 200Bclock ? PCI-E ?

Gzet of them AUTO settings and learn first what settings does what...

[koc]

you should loos your memory timing , first try AUTO , and if you can boot to window , then try to again to set the memory timing to 9-9-9-24

[Johnny87au]

Anything under 1.4 QPI/VTT and your safe, I've even used 1.42

[RejZoR]

Well, my ASUS Rampage II Gene defaults to VQPI 1,35V when using OCZ Platinum 1600MHz @ 7-7-7-20. That is, even if i set it to AUTO, it will use 1.35V. AUTO for VDIMM uses 1.80V (omg) where RAM is suppose to work with just 1.65V at those specs. God knows what other stupid thing AUTO settings will adjust. And this was for stock, non overclocked components from CPU, mobo to RAM. All stock. And AUTO was suppose to be the best for running system stock. It seems that's not true at all.

[Leeghoofd]

This is OCZ to blame.. not Asus... But again one more reason to skip AUTO settings and take manual control !! OC'ed or non OC'ed !! If you wonder why ? Let your rig be build by someone that knows...

Anything under 1.4 QPI/VTT and your safe, I've even used 1.42

I hope you are gonna up them volts when going under LN2...

[kill_a_wat]

This is OCZ to blame.. not Asus... But again one more reason to skip AUTO settings and take manual control !! OC'ed or non OC'ed !! If you wonder why ? Let your rig be build by someone that knows...



I hope you are gonna up them volts when going under LN2...

you never know some people lower volts under extreme cooling

[Johnny87au]

This is OCZ to blame.. not Asus... But again one more reason to skip AUTO settings and take manual control !! OC'ed or non OC'ed !! If you wonder why ? Let your rig be build by someone that knows...



I hope you are gonna up them volts when going under LN2...

Definately, i was talking for more air/water usage

[RejZoR]

This is OCZ to blame.. not Asus... But again one more reason to skip AUTO settings and take manual control !! OC'ed or non OC'ed !! If you wonder why ? Let your rig be build by someone that knows...



I hope you are gonna up them volts when going under LN2...

Erm, not really. It IS ASUS's fault, because it's not properly detecting settings. Not timings and not voltage.

The RAM is rated at 1600MHz 7-7-7-20 @ 1.65V

RIIG adjusted timings with AUTO at 7-7-7-20 for 1066MHz at 1.55V.
At 1600MHz it will AUTO adjust timings to 9-9-9-24 at 1.55V (i think, will have to re-check).
At 1600MHz with forced 7-7-7-20, it will AUTO adjust voltage to 1.80V.

I had to set it to 1600MHz, manually force 7-7-7-20 timings and force 1.65V just because stupid motherboard fails to use proper settings with default setup. The one you'd expect to work the most problem free.
Oh and for the record, my RAM model is on the ASUS's QVL list...
Sure 1600MHz is not by Intel specs, but if ASUS is bragging about 1600MHz support you'd expect it to work properly.

[zpaf]

I need 1.55 from bios 1.50 in windows to run my sticks at 2000Mhz.
Gskill support tell this http://gskill.us/forum/showthread.php?t=1166