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P5LD2 550 Overclocking - Page 2

post #11 of 16
Thread Starter 
Quote:
Originally Posted by sccr64472
Your machine powering down for a few seconds during the high OCs sounds like your psu is nearly it's limits and is struggling to provide enough juice on the 12 volt rail. The 12v rail has to power your case fans,gpu,cpu and when powering up, this is a lot of current to provide. The exact same thing happened to me with my old power supply. When I added 2 more case fans, it was the straw that broke the camel's back.
I suppose that could be true, although I figured the Antec 480w supply would be enough, it does make sense. Running stock speeds my PSU was running around 12.12v on the 12-volt rail, and I've noticed with the processor and FSB overclocked it's reading about 12.04v. So the voltage is dropping but seems stable at right above 12v. These readings are from Asus PC-Probe however and may not be reliable.

I think I'm gonna switch out the mobo today after work and see what happens. If that doesn't help I may get a bigger PSU
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Dinosaur
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post #12 of 16
Thread Starter 
Well I returned the P5LD2 earlier... And of course Fry's was out of stock on the P5WD2

I just ordered one from Newegg, along with a Zalman VF770-CU cooler for my 6600GT. I'm going out of town tommorow for the weekend so hope this stuff shows up Monday morning!!

Thanks for the help, I'll post again when I have my new stuff up and running and we'll see if my problems go away.
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Dinosaur
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post #13 of 16
Hi Kilzon,

I'm a newbie OC'er ( first post here ) and just picked up some hardware similar to yours a few days ago:

ASUS P5N32-SLi Deluxe
Intel P4 650 CPU 3.4 GHz
1 Gbyte Corsair XMS2 TWINX DDR2-667 ( 2 x 512 )
BFG 6600GT PCI-E 256 Mbyte ( very soon to be a 6800GT )
Antec TruePower 2.0 480 watt power supply
Zalman Fatal1ty FS-C77 CPU cooler

After many hours of fooling around & researching, I am pretty stable at 4.216 GHz -> 248 x 17. My BIOS settings are:

FSB 992 ( 248 x 4 )
Vcore 1.500
Vmemory 1.95

Idle temperature & typical usage is 40C-42C
Prime95 Torture-Test ( blend ) temperatures max out at 60C-62C

So I think I am fine for day to day use, and will let my PC run this way for a few days before trying to squeeze more. I *think* I need to focus on voltages and manually memory timings.

- Andy
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post #14 of 16
Thread Starter 
Quote:
Originally Posted by ARL67
Hi Kilzon,

I'm a newbie OC'er ( first post here ) and just picked up some hardware similar to yours a few days ago:

ASUS P5N32-SLi Deluxe
Intel P4 650 CPU 3.4 GHz
1 Gbyte Corsair XMS2 TWINX DDR2-667 ( 2 x 512 )
BFG 6600GT PCI-E 256 Mbyte ( very soon to be a 6800GT )
Antec TruePower 2.0 480 watt power supply
Zalman Fatal1ty FS-C77 CPU cooler

After many hours of fooling around & researching, I am pretty stable at 4.216 GHz -> 248 x 17. My BIOS settings are:

FSB 992 ( 248 x 4 )
Vcore 1.500
Vmemory 1.95

Idle temperature & typical usage is 40C-42C
Prime95 Torture-Test ( blend ) temperatures max out at 60C-62C

So I think I am fine for day to day use, and will let my PC run this way for a few days before trying to squeeze more. I *think* I need to focus on voltages and manually memory timings.

- Andy
This is what I was expecting to get close to, but I really believe the problems I were having stemmed from my Vcore being all over the place. I'm hoping the P5WD2 Premium mobo that I ordered will be a bit more stable. This is although I don't really know the overclocking potential difference between my 550 and the 650 you got I suppose I'll find out on Monday when my new stuff is supposed to be in! I also snagged a Zalman cooler for my GeForce 6600 also!

I'll report back in on Monday when I have a preliminary verdict on the new rig.....
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Dinosaur
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post #15 of 16
Thread Starter 
Well I finally got my new mobo in last night. The good news is that my Vcore seems much more stable!!

The bad news now is that I can't get my CPU temp down below 62°C at full load. I reinstalled the XP90-C 4 times last night (was up till 1:30am!) but still can't seem to get the temps back down to where they were before I switched mobos. It has got to have something to do with either the way I'm using the thermal grease (AS5), or it is not making good contact. My temps on the P5LD2 at full load were around 48°C. Now I'm a good 14° warmer.

The mobos have almost the exact same layout, and I've taken great pains in routing everything to not restrict airflow. I even tried changing the orientation of the heatsink, no help. Oh well, I'm gonna try re-installing the heat sink again tonight and see what happen, unless someone has any ideas

I followed the guide as close as possible here for applying thermal paste:
http://www.overclock.net/intel-cpus/...preading+Guide
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Dinosaur
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post #16 of 16
well the AS5 takes 200Hrs to eventually kick in. Just make shure you dont have too much on, otherwise you will have poor connection between your fan and CPU. Also where are you getting your temp reading from? If it is in the bios, it runs about 80% load.
    
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