Opty 146 max VID shown as 1.45V - how can I up this?

[scottyd]

Hi all,

I've seen screenies of people getting over 3000Mhz from Opty 146s on air with exactly the same stepping as I have. My temps are fine, well lower than 50deg after a while on Prime95.

I'm getting 2800Mhz on 280FSB with 10x multi, runs stable at 1.4V or 1.45V. Won't go past 286FSB without falling out of Windows so I'm thinking I should up the voltage to 1.5 or even 1.55.

Systool and CPU-Z show my Max VID as 1.45, and if I set it above this, there's no change. Sticks at 1.45. Am I missing a setting somewhere? Changing CPU Voltage in BIOS (ASUS a8n SLI mb) makes no difference. If I set CPU Voltage to 1.5 for example, it will boot with 1.4.

I'm presuming by the way that VID is the same as VCore is the same as CPU Voltage - please tell me if I'm wrong.

So in summary, how can I increase my CPU Voltage to 1.5 or above?

Cheers,
Scott

 

[scottyd]

Thanks Alex, I have an Asus a8n sli motherboard, it has options to change the CPU Voltage, but it doesn't seem to work if I put the voltage above 1.45V.

If I set the voltage to e.g. 1.5V in BIOS, it will be set to 1.4V by the time it gets to Windows.

Anyone think I'm missing a setting somewhere like "Enable Vcore value change"???

 

[scottyd]

Yep, done all that, I'm running Ballistix but knocked the divider down just in case, and the HTT multiplier too. I've a feeling the voltage might be mis-reported in a couple of programs. CPU-Z seems to show it as I expect (up to 1.55V which is what the BIOS is limited to without taking a soldering iron to the motherboard) but systool shows it as still 1.4. Weird.

Still can't get above 286FSB (2860Mhz) though. I might check to see if I've applied the thermal paste properly. Failing that I might sacrifice a chicken.

If anyone has any bright ideas not involving chickens - let me know!

 

[scottyd]

Gotcha - thanks Havana for a great response. I'll stick where I am and stop fiddling. Until I get a new board of course...

Cheers all

 

[scottyd]

Actually, one quick thing - I have reduced the HTT multi to 3x, which is way less than 1000 (258 if my maths holds up). So I wouldn't have thought the HTT was a limiting factor.

Does the FSB itself affect something on the board, I just thought it was a virtual setting?

 

[scottyd]

Thanks both above. I'll test it I think by dropping the CPU multi, mem divider, HT multi and see what I can get the FSB up to. Time to start isolating things.

Or I could forget it and just use the thing.

Also, I've just read somewhere that the Maximum VID is nothing to do with the actual CPU Voltage BIOS setting - which is why CPU-Z is reporting the actual CPU Voltage (up to 1.55V as stated in the BIOS) and other programs are reporting a max of 1.45V which is the Maximum VID. Someone more technically savvy than me (not hard...) can explain the difference if they want!

So, slight red herring on the original premise of this topic, apologies, but lots of good advice received anyway, for which many thanks.

Cheers
Scott