I7 OC'd to 3.36ghz, Memory Question

[Grouchy187]

Hey, I recently OC'd my i7 920 to 3.36ghz, here are some of the settings in bios

BCLK Freq: 160
DRAM Freq: 1280
RAM timing: 8-8-8-24
DRAM Voltage: 1.64
CPU Voltage: 1.19 (still testing with Prime95 for stability)

Anyway, in CPU-Z, under memory, I see the Row Refresh Cycle Time (tRFC) is at 72 clocks (the setting in bios is auto). What I'm wondering is if this is fine and also, what exactly is it? Should I manually set it, or is auto fine?

Other system specs:
Gigabyte X58 UD3R
OCZ Gold XTC 6GB DDR3-1600 (PC3-12800)
Cooler Master v8
Corsair 750TX

EDIT: had cpu voltage as 1.91 its, 1.19 but I have just switched it to 1.2

 

[RJR]

You make want to have a look at this article:

http://www.tomshardware.com/reviews/memory-scaling-i7,2325.html