e6300 OC & memory options

[FromTheLou]

I haven't really OC'd a cpu since the Celeron 300 to 450 days so all these memory options within the BIOS are overwhelming.

Anyone have a good/decent guide to explanations of them and a baseline of what I should be shooting for?

E6300 @ 3091Mhz 441x7
eVGA 680i SLI mobo
2x1GB Crucial DDR2 667 10th Aniversery Edition
eVGA 8800 GTS

Also CPU-Z & Core Temp Beta show different values for my Core Voltage, which one is right? I'm forcing it to 1.30volts in the bios, but CPU-Z shows 1.256v and Core Temp shows 1.325v???

Temps
Idle: 35C
Load: 43C

Voltages
CPU Core: 1.3v (Forced)
CPU FSB: 1.4v (Auto)
Memory: 2.3v (Forced)
nForce SPP: 1.4v (Auto)
nForce MCP 1.5v (Auto)
HT nForce SPP<->MCP: 1.45v (Auto)

CPU Speed Info
Core Speed 3091.9 MHz
Multiplier x Bus speed 7.0 x 441.7 MHz
Rated Bus speed 1766.8 MHz
Stock frequency 1866 MHz

Memory Timings
Voltage: 2.3v
CAS# Latency (tCL) 3.0 clocks (Forced)
RAS# to CAS# (tRDC) 3 clocks (Forced)
RAS# Precharge (tRP) 3 clocks (Forced)
Cycle Time (tRAS) 10 clocks (Forced)
Bank Cycle Time (tRC) 24 clocks (Auto)
Command Rate 1T (Forced)
tRRD 3 clocks (Auto)
tWR 5 clocks (Auto)
tWTR 9 clocks (Auto)
tREF 3.9uS (Auto)