Safe CPU VTT and FSB voltages

[Odaik]

hello,

I'm trying to get the FSB on my Abit IP-35 pro to run at 444MHz. However, I'm having issues getting it to boot.

Currently, the system hangs when the windows loading screen appears. Increasing the CPUGTL ref voltage increases the amount of time before it hangs, but how far can I go with the CPU VTT and CPUGTL ref voltages? What is the maximum safe voltage for this chipset?

Thanks!

 

[Dopekitten]

GTL ref can't fry your CPU, just set it so its stable (if its gonna hurt your CPU it will be unstable)

max VTT you want it 1.4

Set yours to 1.28 and you should be able to get much higher FSB
Set your PLL voltage to 1.56 also
Set the NB voltage to 1.3

That should allow you to get higher FSB

 

[Odaik]

OK, I'll try these suggestions ASAP!

 

[Odaik]

hello,

I've tried, but it doesn't make a difference. I still can't boot. I've set 1.27V VTT and tried going (in 1% steps) from 72% to 80% on the GTL ref, but not one setting allowed me to boot. MCH was set to 1.44V (reccommended by corsair due to having 4 sticks).

 

[grieve]

your memory runs @ 1.44v ? wow, nice, mine is 2-2.2v pc8500.

whats the VID on your CPU?

Slap your CPU volts to 1.4 if it boots up and runs prime the start lowering it untill you reach lowest voltage possible.

 

[Dopekitten]

Edit: Didn't read carefully enough

Ok, like the above poster said, up your Vcore
Also, you may just be stuck at 444 FSB, most motherboard (non X48/P45) have a FSB wall at 450ish

Try 460 FSB or above
Try more Vcore
Also, take out 2 sticks of RAM, see if you get more stability--some mobo have difficulty with 4 ram sticks
Also, turn down the NB voltages (MCH) it may be overheating (cosair doesn't know crap)

 

[richardscott]

Also, you may just be stuck at 444 FSB, most motherboard (non X48/P45) have a FSB wall at 450ish

well thats bs the x38 and also p35 can easilly hit 500fsb, my p5e has booted in at 550fsb, and runs stable at 490. dependes alot on the boards aswell, a cheap x38 wont be as good as the more expensive ones.

 

[Dopekitten]

@richardscott

Let me ask you a question, was that 550 FSB on a 45nm processor?
I know the P35/X38 CAN hit 500fsb and above, however with 45nm processes there appears to be an FSB wall around 450, and so far, X48/P45 boards do the best job at skirting around it.

 

[richardscott]

yes it was 550fsb on a e8400 generally the fsb wall might be for quads ure refering to but its not the boards that are limited its the quad cores.

 

[Dopekitten]

@richard, what voltage, b/c thats 4450, and thats not something you see evreyday, i have reason to doubt it

I'd like to see a screeny before i believe... I could believe 550fsb w/ E8400 with like 1.5 or 1.6+ volts, but under reasonable voltage hell no

I mean, hell, i can hit 550fsb on my Q9450, but at like 1.5 volts, so....

 

[Odaik]

hello,

Guys, I will make a new topic on this issue, as otherwise it will go OT and I have found some pretty different issues that are causing me problems too. See my other thread.

 

[richardscott]

well i am at 1.5v but i use a vapo

 

[richardscott]

http://img89.imageshack.us/my.php?image=60328973ai5.jpg this is before a lowered voltage and slowed down to 4.4 and 1.49v

 

[Mousemonkey]

This topic has been closed by Mousemonkey