ocing cpu, without ocing mem?

[jhyukkang]

hello. i never Oced my cpu before. i read the article on OCing C2Ds. and other stuff on the internet.
but i dont get why you have to OC your ram

so i have E4400, P35 DS3L. PC2 5300 667Mhz 3gb, (thing about the ram is that i use 2 different brands, ones corsair value select 512mb X2, others Hyundai 1GB X2.)
i found out that (under SPD tab, 2 diffent rams have different tRC.. one is 5 5 5 15 20 and other is 5 5 5 15 18

my temps are cpu 30 idle 50 load P35 - 40 idle, 58 load ICH - 45 Idle, 58 load gpu doesnt matters but 55 idle 60 load Oced


does any of you guys Oced e4400? how much can i increase fsb without chaning vcore?

 

[Lupiron]

With that RAM you would limit your FSB to about 350ish. Since the RAMs natural rate is double the FSB.

So as ling as you over clock around there, all will be well.

So, you dont HAVE to OC your RAM. Its just that you reach a spot where your slow RAM will bottle neck the rest of your system while OCing, because you are taking it above and beyond what it's supposed to go.

WOW, a x 10 Multiplier! So thats up to 3.5 Ghz. See a problem with that?

--Lupi

 

[BlackKnight7891]

your RAM frequency and your CPU frequency are both controlled by the front side bus (FSB). to oc your CPU you need to increase the FSB. this means the RAM will speed up to. you may need to unlink your ram or change its multiplier to lower its speed to an acceptable level.

OCing has a lot to do with prior experience based on trial and error. bassically you need to change your FSB a small amount then test to see if its stable by running a program like prime95. if its stable raise the FSB again. If its not stable increase the voltage by 1 or 2 settings. be sure to know the maximum safe voltage for your hardware before hand you void warranties by overclocking.

Hope this helps good luck

 

[jhyukkang]

thanks for help,
but one more thing, you guys are saying that if i increase my fsb, ram will autometically speed up too?

if so, what do i have to do inorder to put the ram to the normal speed? (is this connected with the ratio?)

again, anybody ever OCed E4xxxs?

 

[Mondoman]

BK is wrong. The FSB and memory bus speeds are independently controlled. Some BIOS's do this via a ratio between the FSB and memory bus and some just allow you to directly set the memory bus speed. Just make sure that in the BIOS you do NOT select the memory bus speed as "linked" (to the FSB).
Set your memory bus speed datarate to 1/2 the FSB datarate. For example, for a 1333MHz FSB datarate, set the memory bus to DDR2-667 speed. Because you (should be) running in dual-channel mode, that will match the FSB datarate with the memory datarate (the 1:1 ratio that people mention).

 

[jhyukkang]

i just increased my fsb to 250 first to see what happens, and it automatically increases mem, to 800 from 667

 

[Mondoman]

That is because you haven't changed the default BIOS setting that keeps them "linked".

 

[jhyukkang]

oh i see thanks