2.5V is the lowest supported

like pengster said, use a mini fan to blow n it will be a better idea. i think mostly the ram is not hot, but the heatspreader "collect" the heat from your hfs has heat up your ram. Maybe try run without the spreader or add fan. I dont know how true it is. Dont frame me, it just my 2 cents.

welcome 

i think your mobo is a bit hard to oc, mile oc will be not a big problem. your mobo is p4m800, via chipset with built in vga. normally this kind of mobo not oc well as lack og pci/agp locking. you can try to increase the fsb bit by bit.

    HALLO ALL !!!!
I can register to join this club or not?

> Mainboard : Asrock P4i65G
  > Chipset : Intel i865PE
  > Processor : Intel Pentium 4 @ 3000 MHz
  > Physical Memory : 1024 MB (2 x 512 DDR-SDRAM )(Auto 2 channel Trigger)
  > Video Card : ATI Technologies Inc Radeon 9600 XT (V350)
  > Hard Disk : Maxtor (41 GB) IDE
  > Hard Disk : WDC (160 GB) SATA II
  > Hard Disk : WDC (20 GB)IDE (use for download)
  > DVD-Rom Drive : SONY DVD-ROM DDU1622
  > Monitor Type : LG Electronics E700S - 16 inches
  > Network Card : Realtek Semiconductor RT8139 Fast Ethernet Adapter

Number of processors 1
Number of cores 1 per processor
Number of threads 2 (max 2) per processor
Name Intel Pentium 4
Code Name Prescott
Specification Intel(R) Pentium(R) 4 CPU 3.00GHz
Package Socket 478 mPGA
Family/Model/Stepping F.4.1
Extended Family/Model F.4
Core Stepping E0
Technology 90 nm
Core Speed 3012.9 MHz
Multiplier x Bus speed 15.0 x 200.9 MHz
Rated Bus speed 803.4 MHz
Stock frequency 3000 MHz
HELP PLS --

my idle temp i think too high 50 deg..

any ppl can give me what type or brand that i can uograde for the Heat sink and fan?(now using like cap ayam only)

It's best not to get any video card with 64-bit memory datapaths, no matter how fast the memory or core runs, it's all limited by it.

My Radeon 9700 PRO still serves me nicely, although old but with the 256-bit memory datapath, it is still able to play the latest game albeit with mid-range settings.