Overclock.net banner

1 - 20 of 33 Posts

·
Registered
Joined
·
22 Posts
Discussion Starter #1
i built a pII 955 rig with asus m4a78t-e mobo and 2x2gb kingston ram.
I've always been confortable clocking at 3.6ghz on stock cooler.
After getting a new cooler, i wanted to take my cpu to higher limits.
I wanted to get it to the 3.9ghz mark.
But i can barely get to 3.8ghz stable.
So for pii 955 should i raise voltage or drop voltage?
which ones>? cpu? cpu/nb? nb? dram?
is there any other ways i can make my plat form stable?
i tested max fsb my mobo can handle is 236 and max multiplier is 19x
what should I do now?
sorry cause I'm new here, i guess many ppl had the same question as me b4 but i tried their answers.
temps don't seem to be much of a difference here, at 3.75ghz my cpu idles at 30 and mobo at 38.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #3
the load temps are just a little bit higher.
38 for cpu and 43 for mobo.
i originally started with the default auto settings but then after following advice in other threads i changed cpu volt down cause someone said lower volts (1.45v)might be more stable>?
i also tried higher(1.54v) neither of them were stable.
 

·
Registered
Joined
·
5,821 Posts
what's your memory running at ? and your northbridge freq?
 

·
Registered
Joined
·
22 Posts
Discussion Starter #5
northbridge frequency i normally use 12x the fsb.
My memory are still at default, i haven't really tweaked it.
Does it affect the stability>??
 

·
Registered
Joined
·
19 Posts
Bump the 955 using the multiplier, using the FSB will OC your ram as well, which can (and does) lead to instability. Go slow and feed it voltage as required to remain stable. I had a 955 on that same motherboard and mine did not like going past 3.8 or so.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #7
i tried tweaking the ram alittle.
just changed it from 9-9-9 to 8-8-8 and my overclocks still aren't stable.
any suggestions?
 

·
Registered
Joined
·
5,821 Posts
change your ram back to stock settings for now...

what cpu speed/voltage and nb speed/voltage are you at right now, that's unstable?

post up a cpu-z link
 

·
Premium Member
Joined
·
9,720 Posts
Hey - I have a lot of experience with this board. This board requires higher than normal voltages to get things stable at higher clocks.

The vdroop is bad so at 3.8, you'll need somewhere like 1.47~1.48 vcore, because under load that will drop to 1.42~1.41.
 

·
Premium Member
Joined
·
9,720 Posts
Do this:

Leave FSB (HTT) @ 200

Set CPU multiplier to 19
Set DRAM frequency to 1600
Set CPU/NB Frequency to 2600 (13x)
Set HT Link frequency to 2000 (10x)

Set CPU VCORE to 1.4750, if that doesn't work try it up to 1.4875
Set CPU/NB voltage to 1.35v
Leave NB, SB, HT Link, CPU VDDA all to 'Auto'.

Set DRAM voltage to the rated voltage of your RAM

Under DRAM configuration, set DCT Unganged Mode to 'Enabled'
Under DRAM Timings - you can leave them at auto or put in the rated timings manually (be sure you put them in correctly)

The only two voltages you'll need to play with are the CPU VCORE and the CPU/NB VOLTAGE.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #11
thanks very much, it works.
jsut curious, on my aisuite software it says my actual vcore is 1.51v-1.54v is this normal?
 

·
Premium Member
Joined
·
9,720 Posts
That's high. I suggest you check with CPU-Z and Everest (side-by-side) to confirm. It's not deathly high, but too high none the less.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #13
well from everest i like 1.51-1.54v even though in bios i specifically set 1.4875 hmm?
and for cpu-z for some reason when i start it it gives me a bug....
0x5(5) error, and alot of stuff inside are blank....
 

·
Premium Member
Joined
·
9,720 Posts
Do you have the most recent version of CPU-Z, is your BIOS completely updated?

I wish my board overvolted under load! I get bad vdroop instead.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #15
i downloaded the most recent version to install.
And yes i updated my bios to newest version b4 installing.
i'll try installing latest motherboard drivers?
 

·
Registered
Joined
·
22 Posts
Discussion Starter #18
can anyone give my suggestions to good software to test stability on my rig?
it's still not completely stable i think.
also should i mess with the acc?
 

·
Premium Member
Joined
·
9,720 Posts
You can use Prime95, LinX/IBT (for some quick runs, but Prime95 is better), OCCT, SuperPi. There are others. Mainly Prime95 for 6-12 hours is considered 'stable' by most, some prefer to go as long as 24 hours (Blend).

Prime95 also does Small & Large FFT so you can sort of single out the CPU on the Small FFT test (will test very little RAM) or test somewhat more RAM with Large FFT (but not the best to determine RAM stability).

Memtest86+ is also good for RAM testing, but doesn't always catch errors. People prefer 10 passes on Memtest86+ before calling RAM stable, I generally say 3-7 passes is enough.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #20
prime 95 starts with main thread saying cannot create registry key.
Then i do torture test 2threads always stop because of cannot initialize fft code,errcode=1005 so what problem is this? ram instability?
 
1 - 20 of 33 Posts
Top