overclocking auss p5e3 and e8400

krispee

krispee

krispee

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30 Mar 2008
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17
i`m overclocking my asus p5e3 and core 2 duo 3 ghz e8400 and have hit a ceiling at 450 fsb which produces a clock speed of 4050 mhz, after that it gets a bit unstable....the core voltage is 1.384 but i don`t seem to be able to change it in the bios, i`ve turned off a lot of auto systems and spread spectrums and as much manual as possible, pcie is @ 100 mhz, i`m trying to change the voltage but although is sais it has changed it doesn`t show on the cpuz test......
i`m also having problems with my memory, running 2 mb of ocz 1333 ddr3 in 2 modules and if it gets around 900 mhz the whole system gets unstable, over 1000 and it just won`t start at all, it should get up around 1333.....the timings are 5 5 5 15 but if i increase them it won`t start then either, i had major problems in loading the os to start with until i reduced the freq to around 800, then it would load the os and boot properly, increase it to it`s proper running speed and you get nothing......
anyway, i`m going to try and load some screenshots, i`ll be back soon.....

kris
 
ok, the photos i promised...cpuz first....

oc_6.jpg

oc_7.jpg


kris
 
yes, the bios version is 1104, which is definitely the latest......
someone mentioned the fsb:ram divider [as my ram freq is going up as i raise my fsb] but i can`t find it in my bios, any ideas from the pics?

i`m a bit curious about my vcore, as i can`t seem to manually change it in bios.....and actually my ram timings are now at 5 5 5 15, any lower and it destabilises the system.....

kris
 
Vcore has been changed to 1.40625v, so you must have been able to change it.

And you'll have to set the correct DRAM Voltage for your memory (1.5v-1.9v depending on which version of 1333mhz OCZ it is). Once you do that you should be able to run it at 1333mhz on whatever its advertised timings are at that speed.
 
i can change the vcore, yes, but it seems to have no effect, according to cpuz anyway, which gives me a different reading to the bios.....i`ll try manually setting the ram voltages but on cpuz [the SPD tab] it tells me i`m on 1.5v......

and still can`t find the ram divider.....

kris
 
DRAM Frequency is the RAM divider.

The 1.5v given by CPU-Z is the default voltage rather than the actual current voltage (tho it will actually be 1.5v since you have left it on Auto).

A difference between vcore set in BIOS and vcore read in Windows by CPU-Z is normal, especially if you don't have Loadlin Calibration enabled.
 
tried altering the ram voltage and then increasing the freq, but to no effect, then i remember soomeone mentioning that FSB strap to North Bridge was the ram divider in asus bios so tried changing that, it has a dropdown list that includes 'Auto, 200mhz, 266mhz, 333mhz, 400mhz' nothing about the normal ram divider format, ie. 3:2, or something like that....and alongside it it includes this description, 'FSB strap will be automatically adjusted by FSB frequency and DRAM frequency'
does that mean that i can`t really change it, if so why the dropdown list and why in that format?



kris
 
If you leave the strap on auto then you get all the DRAM Frequency/ratio options. Taking it off auto just hides the ratios that can't be used with a particular strap (ie most of them).
 
ok, i get you.....changed that back and i`m back on auto for most things now, it`s my ram that is the problem, trying to get soome specific timings to get my ram to work at the 1333 speed it is supposed to, only works up to 900 mhz at the moment.....getting the cpu to overclock isn`t the problem anymore.....

kris
 
i`ve changed the ram voltage to 1.8 which is loading, but 7 7 7 timings wouldn`t load, so i had to change to 6 6 6 15, strap and freq are set to 333, overclock in manual.....i`ve stopped overclocking the cpu until i get the ram working properly.....

barkeep: did you have any problems getting your ram to its correct speed?

kris
 
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