Overclock Settings Help

LtMatt

LtMatt

LtMatt

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I just installed some new parts into my girlfriends computer.

The parts i added are a

E4700 core 2 duo
4gb corsair xms 1066mhz ram
asus p5q motherboard.

Upon boot the cpu is running at speed 2.40ghz (should be 2.60) but the ram is only running at 800mhz.

I'm unable to make the ram run at the rated speed. I can only seem to get it to run at 1066mhz if i bump up the fsb to 266, which puts the cpu at 3.4ghz and its not stable at this speed.

Forgotten all about overclocking on socket 775, i was hoping for a slight overclock of the cpu without touching the voltage 3-3.2ghz is plenty.

Any suggestions?
 
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Have you tried manually changing the timings in the bios?

Also what are the ram voltages set to? Looking at google the ram is designed for 2.1v but I can't find information on the boards output.
 
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I'm using auto settings, i need to know the best timings to use really for the cpu-fsb-memory etc.

im looking for 3-3.2ghz with memory running at 1066 if possible, if not 800 will do.
 
Auto settings don't tend to run ram at their full capacity. You'd be best off manually setting the timings to the manufacturers reccomendations then overclock from there.

As for the cpu I can only reccomend raising the multiplier by .5 and running a stress test until it no longer boosts any further on stock volts. All boards chips are different so I can't say how far to go.
 
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It seems to be stable at 3.2ghz until i up the ram to 1066mhz. 800mhz is fine, 1066mhz results in a bsod during intel burn test.

What do i need to increase? Ive got the ram running at correct voltage + timings.
 
these are the settings im using but im unable to run the ram at 1066 otherwise i get bsod in intel burn test. 800mhz +cpu overclock stable in intel burn test.

settings

cpu 266fsb strap x12multi =3.2ghz

cpu does have a x13 multi but i settled for 3.2ghz for now.
 
BSOD could be due to needing higher Vcore, Vdimm or looser ram timings.

Are you using 5-5-5-18 timings? Which ram is it exactly? Most DDR2 can take up to 2.1V without issue, so you could try that to test for stability. If that doens't work try adding two more steps of vcore.

In my experience with 775, all my chips needed extra vcore to get over 3GHz. My Q6600 was 1.34V I think. My E5200 was 3.5GHz without too much extra voltage.

I understand that it's your gfs pc, she needs it stable.
 
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Yeah 5-5-5-18 timings.

Ram is
corsair_dominator_8888.jpg


CPU is stable at 3.2 running intel burn @800mhz ram speed its only when i bump the ram up to 1066 that i get a bsod.

CPU vcore is auto but seems to be around 1.288-1.312.
 
My 1.34V Q6600 the motherboard set it at 1.43V Auto. >_< Had bad vdroop too, was actually 1.28V under load.

Bit weird that it isn't stable with that memory on that board.

http://www.techpowerup.com/reviews/Corsair/TWIN2X4096-8500C5DF/3.html

The 533MHz speed is 2.1V but remember 775 doesn't benefit from ram higher than the FSB.

266Mhz FSB = 266x2 for the DDR2...no point running it over 800MHz for that overclock.
 
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BrianB said:
If it's your gfs pc, might as well leave it at 800MHz? Probably won't notice the difference? You may be able to use much lower Vcore than auto with 775, the motherboards always used way too much vcore for my liking. I would try setting it manually at 1.280V and see if it is stable and then maybe try 1.2790V etc, less heat and power consumption for her.

My 1.34V Q6600 the motherboard set it at 1.43V Auto. >_< Had bad vdroop too, was actually 1.28V under load.
Click to expand...

Yeah i guess i could leave it, very hard to tell the difference no doubt.

It just irks me though, know what i mean? :D

She had a E2180 before, stock around 2ghz but was running @2.67ghz, the strange thing was i could run that at 266fsb and the ram at 1066 no problems without touching anything. Just left it all auto.

Any idea what the stock voltage is for a E4700?
 
I edited my post, sorry. No need to run ram higher than the FSB, try run it 1:1 with the FSB.

It should tell you stock voltage in BIOS, when non overclocked and voltage set to auto lol, it depends per CPU.
 
Even with the ram at 2.2V in BIOS? If you check PC Health Status in BIOS to make sure the ram voltage is correct, also check in windows under load using something like HWMonitor. If voltage drops under load, can cause BSOD.
 
BrianB said:
Even with the ram at 2.2V in BIOS? If you check PC Health Status in BIOS to make sure the ram voltage is correct, also check in windows under load using something like HWMonitor. If voltage drops under load, can cause BSOD.
Click to expand...

I'll double check tomorrow but sure i tried earlier with 2.2volts set and before that 2.1, made no difference.

Could fsb voltage/northbridge voltage need a bump? Would seem strange with only 2 sticks of ram in.
 
I did add one step of north bridge voltage on my Q6600 overclock. Also +2 on FSB voltage. Shouldn't need to though.

The ram should run at stock speeds of 1066MHz. Have you tried having the CPU at stock and the ram at 1066MHz? Ram might just be incapable of being clocked at specs. Has happened to loads of my ram, all of my OCZ ram and 1 pair of my Corsairs. They would be fine at looser timings, but not at their specified. For example my DDR400 wouldn't clock at 2-2-2-5 or w/e, but would work at 2-3-2-6 so I sent em back under RMA. Always a good idea to run Memtest86. Could try it at 1066 6-6-6-18 maybe it's the timings.
 
I dont think its possible to run the cpu at stock speed 2.6ghz with the ram at 1066 because of the fsb strap. To run the ram at 1066 the fsb must be 266 minimum.

If i reset everything to default cpu is running at 200fsbx13=2.6ghz but the ram is then at 800speed max, to get ram up to 1066 i up the fsb to 266 and lower the multi to x12 and then have the ram at 1066. I suppose i could try the multil at x13 but that would take the cpu up to 3.4ghz.
 
Oh yes, that's right I forgot how much the FSB straps the ram on 775. :D My friend's pc I built has been running at 3.2GHz for like 5 years now at 1.3V. It's covered in dust too because she doesn't know how to clean it! This is with Kingston HyperX 1100 and OCZ reaper 1066 at 5-5-5-18 2.1V.

She doesn't care, I just made it stable and no problems.
 
Well shes using it now so i wont be able to play around with it until tomorrow when shes at work.

I just had to get it stable (and i did) in time for when she got home. :p

Will have another bash at getting the ram at full speed tomorrow.
 
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