taylormsj

I am looking to overclock my sig. to around 2.5 GHz - keeping the CPU/RAM at 1:1 ratio giving me and overclock of 250 MHz on the ram.

At the moment i can get up to 2.6 GHz stable - however i am at the moment at 2.5 GHz with the ram at CPU/12 giving a ram speed of 208 MHz - which is not what im after (i also heard that ram needs to run at the same frequency as the cpu to get better performance)
If i try and set my divider up to 1:1 i can get a stable 2.34GHz with 234MHz memory but anymore than that either wont boot or is unstable.

I have looked at this website and tried to copy the steps that they have done to get what im after http://www.legitreviews.com/article/229/2/ 2.52GHz and 252MHz. I tried to copy the memory timings etc... but could only get to around the 220 to 230 mark before not posting. But when in windows i get crashes - whihc i think is the memory timings perhaps.

My BIOS has these options.

CPU clock multiplier
CPU vid control
HT clock multiplier
CPU frequency (fsb)
Mem clock index value (this controls the divider ratio im pretty sure)
DRAM config
PCIE freq
CPU Vcore
VDIMM woltage.

Inside DRAM config i have

CAS latency (TCL)
MIN RAS active time (tras)
RAS to CAS delay (Trcd)
Row precharge time (trp)
Row to row delay (Trrd)
1t/2T memory timing.

Can anyone suggest what i could try to get a stable overclock of 2.5GHz and 250 MHz.

At the moment i have the CPU frequency at 250, the HT link at 3x, cpu/12 ratio, a slight increase in voltages and auto for all of the DRAM configs.

Like i said i can get 2.34GHz and 234 MHz stable on auto mem timings - but i cant get it much further than that on cpu/RAM ratio.

Thank you for any help

__________________
E2160 @3.2 (3.618 GHz max) | 2Gb OCZ 6400 @ 890MHz | 8800GT (725, 1895, 1970 MHz) | Coolermaster CM 690 | Hiper 530 watt | Maxtor 160 Gb | D-tek fusion, 5.5mm nozzle / Swiftech MCW60 with enzo's / Swiftech D5 / MCRres / MCR320 radiator / 3 high yate loon / 7/16" tubing / black feser one

hermeslyre

You can get it to 2.6 stable with a divider on the memory? Then do it. In all seriousness the extra 33mhz of RAM speed isn't going to help anything. However the increased Speed of the chip will

taylormsj

I heard that if the ratio isnt 1:1 then it runs slower
At 2.6 the mem is 216 MHz - meaning that the cpu can only run at 2.16GHz with the ram - is this true i read it on here somewhere

__________________
E2160 @3.2 (3.618 GHz max) | 2Gb OCZ 6400 @ 890MHz | 8800GT (725, 1895, 1970 MHz) | Coolermaster CM 690 | Hiper 530 watt | Maxtor 160 Gb | D-tek fusion, 5.5mm nozzle / Swiftech MCW60 with enzo's / Swiftech D5 / MCRres / MCR320 radiator / 3 high yate loon / 7/16" tubing / black feser one

hermeslyre

Lol, no that's not true. When people say that your OC is better with a 1:1 Ram ratio they are referring to benchmarks. Benchmarks that show a 1% difference in performance.

A divider is your friend.. not your enemy.