Pi 1M 11.937s,cooling by air w/AC Cooling and need some help!!

[K.J.]

Mobo：ASUS P5WDG2 WS Professional Rev1.03G BIOS 0004 2006/8/4 vDroop + vMCH + vDIMM MODed vMCH=2.03V
CPU：Intel Conroe Core 2 Duo E6600 SL9S8 L629A531 B2 @ 470.9*9 4238.5MHz V-Core=1.68V / 1.6V in the BIOS
Cooler：Thermalright Ultra-120
RAM：G.SKILL F2-8000PHU2-2GBHZ V-DIMM=2.6V @ 471MHz 3-3-3-0-15.6-0T-17-tRD5-8-8-7-3-4
HDD：Seagate Barracuda 7200.10 ST3250820A 250GB 8MB Cache IDE
VGA：Canopus G32 GeForce2 MX400 PCI 32MB DDR
PSU：ZIPPY PSL-6720P

SuperPi 1M Result：11.937s



My highest clocks of Conroe CPU in the CPU-Z ===> 4432MHz
Done by software of ClockGen
http://valid.x86-secret.com/show_oc?id=124988



Now I'using IDE Hardisk
I don't know when my CPU works on 4175MHz for calculate Pi 32M,which hardisk can I use? This IDE HDD's speed is too slowly.
It spent 12m17s completed 32M calculating @ 4180MHz !!!!
In 5 days before,My computer had done 32M calculating @ 4158MHz 462FSBx9,the result is 11m56s,and hardisks is 2pcs ST7200.10 320G w/RAID 0.....but now they are all dead.

Because over 460FSB,use SATA Hardisk is very dangerous,in this 4days,I killed 5pcs SATA HDDs at 470FSB (T_T !!!!) I don't want to kill my 6th SATA hardisk ====> WD RaptorX 150G-AHFD