Achieving 1:1 FSB:DRAM on ASUS P5B-E

[retroborg]

Good day.

I was wondering what settings I have to apply in my Mother Board in order to achieve a 1:1 FSB : DRAM ratio without damaging my PC components.

I’m currently using 4 x 2GB (8GB Total in Dual Channel) DRR-2 Kingston KHX6400D2/2G memory modules (99U5316-068.A00LF) 1.85V,
2.4GHZ Core 2 Duo E6600 Intel CPU (4MB Cache) and an ASUS P5B-E (Intel945 chipset) Mother Board with the latest BIOS.

All mother board settings are set to Auto and configure DRAM timing by SPD is Enabled.
Memory Remap feature in Enabled (Allow remapping of overlapped PCI memory above the total physical memory)
My mother board memory voltage can be set up to 2.10V
CPU Frequency when AI tuning is set to manual is at 266 and can range from 100 – 650
DRAM Frequency is set to auto but can reach up to 1066
PCI Express Frequency is Auto but can reach up to 104
CPU VCORE voltage can reach up to 1.5250V
FSB Termination Voltage can reach up to 1.450V
PCI Clock Synchronization mode can be set to 33.33MHZ
The CPU FSB is 1066
CPU Ratio setting is Auto
Ratio Status is unlocked and can range Max 09.0 – Min 06.0
Ratio Actual Value: 9

This is what CPU-Z is currently showing:

CPU when idle:


CPU in full load when playing RAGE.


My mother board:


My memory:



Thanks in advance.

[aedipuss]

well if you really for some weird unknown reason have to have 1:1 then manually set the memory to 266Mhz. doing so will slow down the computer as right now it's at 400 giving a memory speed of 1600Mhz.

[mammo1789]

Fast look at it it seems that yours Ram is 800mhz DDR2 rated ( at least according to manufacturer ) and your cpu works at 1066 so you want to make the ram work at 1066 right?

Another thing you have to know is that cpu multiplier is not unlocked as you think 9x is his default and he is "downing" the speed when there is no work for the cpu or when it reaches certain temp level to prevent damage to the cpu it goes down to 6x ( unlocked means that you can go beyond the default 9x meaning 10x 14x or more so you don't have to rise fsb to overclock the cpu). If you don't want your cpu to throttle (going to lower speeds when not in use ) then disable it in bios ( C1 and speedstep disabled ).

Concerning the ram going to 1066 from my experience ( i have also asus board but rampage formula ) on that memory is pretty slim ( even if you bump the voltage to 2.1v ( from 1,8v default ) it wont work but you may try it to see how it goes.
You have to use loosen timings for the ram (example 5,5,5,23 or even 6 with 25 ) on that fsb to see if it works.
Also mind you that for stability you have to rise the voltage on the cpu ( but not too much )

Memory Remap feature in Enabled (Allow remapping of overlapped PCI memory above the total physical memory)

it is used for systems for more than 4gb to be recognized by some bios es so enabled is ok

Very good examples and settings ( for maximus formula and rampage but many settings are on your motherboard the same as them ) try it

http://www.techpowerup.com/forums/showthread.php?t=57098

[aedipuss]

mammo - right now his fsb:dram is 2:3 in order to make it 1:1 he has to slow down his ram to 266

[mammo1789]

mammo - right now his fsb:dram is 2:3 in order to make it 1:1 he has to slow down his ram to 266

well if you really for some weird unknown reason have to have 1:1 then manually set the memory to 266Mhz. doing so will slow down the computer as right now it's at 400 giving a memory speed of 1600Mhz.

That is not true it is ddr2 ram so 400 fsb or 200 quad pumped (200x4 =800) ( but for ram only that's why the ratio of 2:3 )for ram x2 it is 800mhz not 1600 his ram works at 800 mhz, his cpu works at 2,4 ghz or 1066 FSB ( precisely 1064 mhz fsb 266x4 instead of 200x4) A Core 2 Duo E6600 processor at 2.4 GHz with a 1066 MHz FSB. The FSB is known to be quad-pumped, so its clock frequency is 1066/4 = 266 MHz. Therefore, the CPU multiplier is 2400/266, or 9× like in his case. The ram ratio tries to compensate for miss speed between the cpu and ram so it helps with overclocking .

To pint out plain and simple in the bios he has to put for ram 1066 that means a fsb of 266 instead of now 200 ( instead of now 800 mhz for ram ) but as i sad earlier to do that he has to have good ram sticks and to loosen the timings and bump the voltage of the chips. so he has to rise his ram not lower it

For example my q6600 works at 3,6 ghz 400x9 in bios and ram works at 800 mhz ( 400x2 in bios) so it is 1:1 ratio as he is asking.

I don't think that his ram can go to 1600 mhz ( rare samples do if any ) and small number of motherboards can support 1200 ram like mine when overclocked 1600 mhz for DDr2 is not standard and hardly ever achivible so it is not possible that his ram works on 1600 mhz on that motherboard and with that ram

[aedipuss]

sorry if i was wrong.