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Overclocking E8400 woes

post #1 of 15
Thread Starter 
Hey all, new to the forum and somewhat new to over clocking (to this degree, atleast)

the overclock bug has bite me bad... i already want to try 4ghz, but first i want to find a stable setting.

The reason i'm even overclocking to begin with is because i want to play black ops at a somewhat decent resolution with somewhat decent texture settings without lagging my ass off. I previously had a 9800GT with e8400 at stock speeds. The game was near unplayable, unless everything was turned all the way down and even then it wasn't great.

I have a P5N-D with E8400 wolfdale, Crucial ballistix 8gb 800mhz ram and a Zotac GTX 470.

Right now i'm running at 3.6Ghz on stock cooler, idle temps around 44-46*

I can't seem to get the system to stay stable for very long under gaming. (~15min) I get a blue screen and it crashes.

My Vcore in Bios is 1.28 (1.248 in CPU-Z)
NB and ST set to 1.4V
SB is set to auto
Dram is 2.05V
FSB is 1600
Ram is 800
multiplier is x9


My last gaming session was pretty good, settings are not jacked up though but i was able to play in somewhat smooth gameplay for 15 minutes or so before i got the blue screen. More power from the CPU would be nice though, as its not quite as smooth as i want it to be.

Any suggestions?

I previously upgraded from some low budget 4gb ram to the 8gb ballistix ram which when i ONLY changed that the system was already much more stable, i also set the memory timings to 4-4-4-12 and CMD rate to 2.
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post #2 of 15
You use 4x2GB ? Try taking out two sticks of RAM and use 5-5-5-15 and then try 1780QDR.

There is no way in hell you will run stable using 4x2GB RAM at 800MHz + at 4-4-4-12 with that crappy Nvidia motherboard.

As I've said, try 4GB first. Then if it works, you could try 8GB again and unlink mem and try to keep it at 667MHz 4-4-4-12 or something.
Edited by turrican9 - 4/17/11 at 8:31am
    
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post #3 of 15
Thread Starter 
yes 4x2. Currently the memory is unlinked.

So you think my stability issues may be with the ram? Because for what its worth it was doing this before i put in the 8GB setup. Actually much worse, any gaming would crash it. I was running 1 crucial 2x1 800mhz and x2 1 gb sticks from elpida @ 666 but now its just all the same ballistix.

Just crashed again in black ops, i slightly upped the vcore 1 notch and it seemed to last a bit longer before crash. idle temps still the same.

On another note, do you guys think going from 3.6ghz to 4ghz would be worth the hassle for improved performance? Alls i want is to get good performance in my games with the settings somewhat high.

Is the additional 4gb of ram even worth it vs overclocking the CPU?
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post #4 of 15
imo the gaming difference between 3.6 to 4.0 is like 2-4fps
its not worth the extra temps and instability.
4ghz is just bragging rights

as other answer. 4 sticks of ram is always harder on a mobo than 2

are you using a game to test stability?
dont do this, use either prime95 (small fft's) or intel burn test.

you have to run intel burn test properly
before running, open task manager and see the amount of free ram.
for example i have 2550mb free ram so in IBT i enter a custom amount of 2500. (just below the free amount)
then i change the threads from auto to 4 (quad core) or 2 for dual core
now every run i make i always get around 40-42 gflops. (consistent)

The following is the estimated GIGAFLOPS for a few chips:

E5200 @ 3 GHz 19-20 GIGAFLOPS
E8400 @ 3 GHz 21-22 GIGAFLOPS
E9550 @ 4 GHz 54-56 GIGAFLOPS

the higher the gflops, the faster your cpu will be running, therefore it will be quicker to see if its stable
it often finds an unstable overclock in less than 10 mins.
1hr will be classed as stable imo
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post #5 of 15
Thread Starter 
Ran the test, failed in under 5 mins. Temps got as high as 63C. Should i keep increasing vcore to gain stability? I would rather not take out the ram and it feels like a nice upgrade from the standard 4gb i had before
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post #6 of 15
Quote:
My Vcore in Bios is 1.28 (1.248 in CPU-Z)
NB and ST set to 1.4V
SB is set to auto
Dram is 2.05V
FSB is 1600
Ram is 800
multiplier is x9


My last gaming session was pretty good, settings are not jacked up though but i was able to play in somewhat smooth gameplay for 15 minutes or so before i got the blue screen. More power from the CPU would be nice though, as its not quite as smooth as i want it to be.

Any suggestions?

I previously upgraded from some low budget 4gb ram to the 8gb ballistix ram which when i ONLY changed that the system was already much more stable, i also set the memory timings to 4-4-4-12 and CMD rate to 2.
I have an E8400 with 8GB RAM. That was with a Giga Ep45-UD3P mobo, though. I needed 1.35vCore, 1.28 VTT (CPU Term), and 1.28 NB(MCH Core) to hit 500x8.

Also, what are your tRFC and Static tRead numbers? They might not make a difference or they may. For 8GB I used a 68 tRFC and a 11 tREAD.

Check my sig for more information, it may help, who knows.

Also, my E8400 had a VID of 1.25v, not sure if that makes a difference.
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post #7 of 15
I had a buddy with an e8400 and a P5N-D. We couldn't get it stable past 3.8ghz no matter what. This same chip would run stable at 4.0 on my Maximus II Formula. I would shoot for 3.8 with that board. 4.0 may not work.
post #8 of 15
Thread Starter 
For whats its worth i did a 2hr gaming session of SC2 with no issues, but as soon as i started playing Black ops it crashed


I've just been cranking up the vcore and i seem to be getting more and more stable. I've been using the intel burn test to get quick results to help me get a good idea of where i'm at.

I noticed my core was starting to get a little hot though, so i made my own little home-made makeshift CPU cooler O_o.

Don't laugh, it dropped my temps by over 10-15*. This makes me want to try to squeeze even more out of it. First i need to stabilize it though...

Flipped one of my exhaust fans to intake and routed some dryer hose to the fan which is aimed at the CPU.

Idle is around 34, full load is 55 via Intelburn... Testing in progress, so far so good at about 15 minutes. Going to go wash my vette and come back and see how its going




Edited by Kaldar142 - 4/17/11 at 12:27pm
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post #9 of 15
Kaldar142

Lol! Nice going man
    
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post #10 of 15
Thread Starter 
Well, either the cold air made a difference or 1.3 vcore is the magic number, no errors with Intelburn test and no crashes in Black ops.

Although, i'm still not satisfied with the FPS / smooth gameplay in black ops.

It still feels like its a tad bit laggy in a decent sized firefight.

What are my options for improved playability? Continue overclocking?

My Zotac GTX 470 is at 1700mhz engine clock and the memory/shader are at 1230mhz according to the zotac firestorm O/Cer

My brother has an Evga GTX 470 that he isn't using, i wonder if i should go SLI...
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CPUMotherboardGraphicsRAM
E8400 P5N-D Zotac GTX 470 8GB Crucial Ballistix 800 
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My System
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CPUMotherboardGraphicsRAM
E8400 P5N-D Zotac GTX 470 8GB Crucial Ballistix 800 
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