ASUS P5B-Deluxe; Problems & Fixes

[MARINECOP]

Had my system overclocked for the past few years and everything was great. I just put in a new video card (512 Sapphire HD 4870) and new memory (CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800). Started computer and overclocking failed. I had to revert back to original bios settings. Now I am screwed. CPU-Z had my core speed at 1600mhz when it use to be 3200mhz. Can anyone help me with a new overclock?

Here are my specs:
ASUS P5B Deluxe/WIFI-AP edition.
Intel Core 2 Duo E6600 2.40GHz OEM Processor. Ultra Xwind CPU cooler.
CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800
Western Digital / Caviar SE 16 / 250GB / 7200 / 16MB / SATA-300 / OEM / Hard Drive .
Sony DRU810A / 16x8x16x DVD+RW / 16x6x16x DVD-RW / 8x DVD±R DL / Interchangable Bezels White or Black / Internal DVD Writer - Retail.
1.44MB Floppy Disk Drive (Black).
500w ANtec Smartpower 2.0.
SAPPHIRE 100259L Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16
Creative Audigy Sound Card.
Samsung SyncMaster 940mw HD/WS LCD Monitor 22".

Also, is their a way through the BIOS to increase my CPU fan and I am using a very old BIOS (711) should I update it?