Dell XPS 730 Memory settings via Bios and overclocking -Need Help!

I recently purchased a memory upgrade for my Dell XPS 730. The memory modules are from Corsair,Manf. part# TW3X4G1600C9DHX G or Dell Part # A1640633, and I have 4 of them to give me 8 gigs of memory. I am using Vista 32 bit and I know the 4 gig limitation but I bought them because I'm going up to Windows 7 64-bit soon and also for future proofing if I plan on upgrading my motherboard in the near future. Currently, the actual memory speed is only 1066.7. The chips can go up to 1600. I am buying a fan for the memory modules and I need help in setting up the bios (ver 1.06) so I get can the best bang for my buck on these sticks. I have a Core 2 Extreme CPU X9650 and I do not want to overclock it, just the memory. Below are my specs:

Memory chips:

XMS3-1600

2048 MB ea - 4 total

9-9-9-24

1.80 V

Ver. 1.2

09290976

Bios:

Advanced - Overclock Config -

FSB Memory Clock Mode Auto

FSB (QDR) Mhz Auto

Actual (QDR) Mhz 1333.3

Mem (DDR), Mhz Auto

Actual Mem (DDR), Mhz 1066.7

Advanced - Overclock Config -Memory Timing Setting

Memory Timing Setting Optimal

x tcL (Cas Latency) - Setting Auto (0) - Current Value 17

x tRCD - Setting Auto (10) - Current Vaule 7

x tRP - Setting Auto (4) - Current Value 7

x tRAS - Setting Auto (7) - Current Value 20

x Command Per Clock (CMD) - Setting (7T) - Current Value 6T

Advanced Memory Settings -

x tRRD - Setting Auto (7) - Current Value 4

x tRC - Setting Auto (20) - Current Value 27

x tWR - Setting Auto (0) - Current Value 10

x tWTR - Setting Auto (59) Current Value 0

x tFAW -Setting Auto (8) - Current Value 0

x tREF Setting Auto Current Value 7.7uS

Advanced - Overvoltage Configuration

Memory - Setting Auto - Current Value 1.500V

Any help is greatly appreciated.  Thanks!