Is it bad to run VCCSA voltage at 1.10v for 2133mhz ram?

[jincuteguy]

when you select xmp proilfe write down the voltages its going to use. Then change the setting to manual and enter in the volts it had selected. Manual always runs better then "profiles". u got it ? or

Yea I already tried that, I put the voltage in manually.

[jincuteguy]

VCCSA and VCCIO (otherwise known as VTT) are probably best kept about same level if that was the question you were asking and 1.1v is a pretty normal voltage....nothing wrong with running at that voltage for 2133.

The guys are simply suggesting that you reset the BIOS and then set XMP for the RAM. Then with this set you can look at what voltages that XMP profile is actually setting....you can read them off from the BIOS....it will help you to know what voltage the RAM's own profile is trying to set.

You can use the voltages you note down as the starting point for manually setting up your RAM. If you set AI overclock tuner to MANUAL you can take full control of your voltages and often run the RAM at voltages lower than the XMP profile would set.

For example if you see VCCSA and VTT are set to 1.25v and VDIMM to 1.68v by the xmp profile you can set that manually to start off and then reduce VCCSA and VTT slowly towards 1.1v and VDIMM to 1.5 or 1.65 (whatever the kit is rated at) while you test for stability...

Yea I already tried that, the VCCSA / VCCIO the XMP profile set was the same as without XMP which is 0.925 (same as Auto). And the Ram voltage the XMP sets was 1.6v which is what this Ram kit is rated at. I already tried these and it wasn't stable.

[Arne Saknussemm]

Right you are....I've seen a few times that auto sets low VCCSA and so low for 2133 I don't think is good...surprised XMP is trying to set this value..... Try 1.1 or 1.15 and see if that keeps you stable.....

[jincuteguy]

Yea I tried 1.0v and that didn't work. Right now Im trying 1.05v, and so far it 's going good. Hopefully I won't have to go up to 1.10v Im just worried that running VCCSA at anything higher than 1.0v will degrade the cpu. But I've seen a lot of ppl are running at 1.10v for 24/7 and they said it's fine. So it's not clear to me whether it's good or bad.

Also, since this is an Asus forums, does anyone know why they didn't put the VCCIO option in the bios for the Z77 Sabertooth board? If any official Asus agent on here can share some lights?

[Arne Saknussemm]

1.1 is a perfectly safe voltage (indeed 1.05 is considered the base voltage so...) up from 1.15 I would start to wonder. 1.15 is probably fine too but 1.2 1.25 etc I would not want to run 24/7 personally...

Of course the lower the better while stable is what you are after. However I have seen recommendations to maintain VCCSA and VCCIO within a certain distance of Vcore and vdimm....on X79 that's within 0.3v of vcore and 0.6 v of vdimm....not sure about exact deltas on Ivy

[jincuteguy]

Do you think it's better to run a fixed cpu voltage? or have the Speed Step enabled and let the cpu lower the vcore and speed when idling or searching the web?

[Zka17]

It depends what you doing with your system... for benching it is usually better to disable all power saving features, but for everyday use i would enable them...

[jincuteguy]

Does it make a difference for stability though?

[Arne Saknussemm]

Not for normal OCs. these days you can run a pretty high OC and keep these features on....you can have your cake and eat it these days. The modern processors aren't like the old ones the disable everything rules no longer apply.

As Zka17 said this changes for very high clocks and benchmarking...