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Power Supply Limitations?

D

Drinnit

Limp Gawd
Joined
Nov 16, 2003
Messages
166
I've not had so much success with my Athlon XP-M 2500+ when it comes to overclocking.

Still a nice chip, I can run it decently quick without throwing the voltage through the roof, but I've pretty much hit a wall at where I am (see sig.)

I'm wondering if my PSU could possibly be holding back my overclock? The voltages on it don't seem too bad, but if there's a possibility, I may be in the market for a new unit.

It's a generic 350w power supply. The 12v rail is at 11.92v, the 5v rail is at 5.00v, and the 3.3v rail is at 2.72v. Could the (slightly) off 12v rail, or maybe the (pretty far off) 3.3v rail be holding me back?

The voltages themselves don't vary much, they pretty much stay about the same all the time, with a slight mummer with .1-.2v lower every once in a while .. and I'm getting all of this from MBM.
 
The 3.3V meter is probably displaying your vdimm(dimm voltage) which is set to 2.77 so that's why it seems so low, as for 12V I think it's the +5V rail that feeds the CPU, what you really should look for to be the limiting factor in your CPU OCing is to start up Prime95, let it run for a while then you check if you Vcore and +5V rail drops a lot or seems unstable, I know mine sure does with my PSU overvolting it like .1V under idle then dropping to 1.744V sometimes under load even though in BIOS it's set to feed 1.775V. This does limit my OC so maybe you should look for something similar.
 
I let Prime95 run for a while .. the 5v line is staying at 5v, sometimes jumping to 5.3, it's slightly overvolting during load.

Hm.. guess my processor just ain't got what it takes to be a 2.5ghz chip.
 
Why are you bothering with the FSB at all? Leave it at 200mhz, turn the multiplier to 12, then set the core to 1.8v. Reboot. You should at least be able to hit 2.4Ghz like I did. My only problem is my mobo won't let me select above 1.8v so I can go higher.

Try it and see if that works above.
 
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