P4s533 overclock - major voltage drop under load

[pepsimanz]

Just got a Asus P4s533 (refurbished from new egg), clean installed winxp, and try to OC my 1.6a to 2.4. I used the +0.2 voltage and set the voltage at 1.6V in bios. Consequently, my bios show a 1.71-1.74 voltage. Using asus probe, I get a 1.7-1.71v reading when windows loaded. However, once I do my prime95 test, the voltage drops to 1.65-1.67v. I heard from other threads that this is normal, however, I don't feel comfortable with this kind of voltage drop. Is it my power supply? I am currently using a sparkle 300w PS. Should I get a stronger PS (thinking about a Antec true power 430), would it fix the problem? I am a little worried that this voltage drop will make my system unstable at times. Should I up the voltage higher to give more room for the voltage to drop and still be able to run the CPU at 2.4ghz.

In addition, I noticed that the 3:4 is not available for anything more than 132FSB, I heard there are some hack for the P4B series to make this available, is there a trick to enable this for the P4s533. I just received my Corsaid DDR400 CL2.5 stick, I would like to utilize ddr400 if possible or else I feel like I just wasted my money on the ram. please help.

 

[o1die]

Your voltage drop may be solved by a better power supply, but I wouldn't bother if your system is stable. I'm getting an occasional random reboot, but I think it's heat related, since I'm not using any case fans (I like a quiet system). For the 3:4 ratio, you could try removing the cmos jumper. I beleive this is what makes all the ratios available, but I can't remember for sure. Just try it and see if the system will boot. Good luck.

 

[jmeyer2718]

Thats not a bad voltage drop. I have the Antec true 430 and I get about the same. Right now idle, my voltage is at 1.7v, and under load it can get as low as 1.63. Dont worry about it. From what I've heard though, 1.74v is pushing it. You might want to lower your voltage to 1.575 to play it safe.

You may want to invest in a better power supply though. Depending on your other hardware, 300w is most likely too low for a stable OC.

Originally posted by: pepsimanz
Just got a Asus P4s533 (refurbished from new egg), clean installed winxp, and try to OC my 1.6a to 2.4. I used the +0.2 voltage and set the voltage at 1.6V in bios. Consequently, my bios show a 1.71-1.74 voltage. Using asus probe, I get a 1.7-1.71v reading when windows loaded. However, once I do my prime95 test, the voltage drops to 1.65-1.67v. I heard from other threads that this is normal, however, I don't feel comfortable with this kind of voltage drop. Is it my power supply? I am currently using a sparkle 300w PS. Should I get a stronger PS (thinking about a Antec true power 430), would it fix the problem? I am a little worried that this voltage drop will make my system unstable at times. Should I up the voltage higher to give more room for the voltage to drop and still be able to run the CPU at 2.4ghz.

In addition, I noticed that the 3:4 is not available for anything more than 132FSB, I heard there are some hack for the P4B series to make this available, is there a trick to enable this for the P4s533. I just received my Corsaid DDR400 CL2.5 stick, I would like to utilize ddr400 if possible or else I feel like I just wasted my money on the ram. please help.

 

[Tates]

In addition, I noticed that the 3:4 is not available for anything more than 132FSB, I heard there are some hack for the P4B series to make this available

If you're running your 1.6a at 2400MHz, try the 4:5 setting. There is no hack for the P4S533.

On my rig, my SiSoft Sandra mem scores average 2810/2810 at the above setting. I'ld say that's pretty good.

 

[Duvie]

I have had multiple boards, multiple power supplies and trust me a .03-.05vcore drop is average around even with ppl with much bigger power supplies...wattage does ot mean everything when picking a PS....

I set 1.71v and it drops to 1.66v under prime load and I am stable at 1.6@2.736ghz...In my case I may be geting to the limit of my PS but I get .05v drops as far back as 2.6ghz and I went quite a bit further...I only get .03v at default 1.6ghz so it does show it draws differently, but I have oc'd over 1ghz!!!