I picked up a Dell Dimension 5150C for �370 for a friend yesterday. 2GB of DDR533, 160GB Samsung Spinpoint, Pentium D 2.8GHz dual core all in a tiny BTX case. Absolute bargain for him, even though there's not enough room for tinkering for me.
Anyway, the processor is kicking out so much heat that I really want to bring the VCore down a bit. I just ran CPU-Z and it detected the VCore as 3v! Surely this can't be right? I was expecting 1.5V max so maybe it has something to do with the dual cores which is throwing CPU-Z of track. Or maybe the Dell just reports whatever it feels.
The sSpec is SL88T. Firstly, is there any way to find out what the VCore actually is? Secondly, can anyone figure out which pins need joining/breaking to bring the VCore down to something reasonable.
Here's the VID table (dead link removed) taken from page 16 of the data sheet. It's a nice easy mod on my Mobile Pentium 4M where you bend a pin at the edge to bring VCore down to 1.1v which allows me to run passive. I don't expect the same from this but it's giving out so much heat that I don't think it's operating at it's correct voltage in the first place.
Pin mod to undervolt Pentium D 820 in Dell Dimension 5150C
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Pin mod to undervolt Pentium D 820 in Dell Dimension 5150C
Last edited by wjdashwood on Sun Nov 05, 2006 3:36 am, edited 1 time in total.
The processor datasheet says max Vcc is 1.55V, so your expectation was more or less correct.I just ran CPU-Z and it detected the VCore as 3v! Surely this can't be right? I was expecting 1.5V max
datasheet
page 19, section 2.5, table 2-2
As you say, the 3V Vcore may have something to do with the program detecting 2 x 1.55V.
Being a Dell, the chances of there being undervolt options in the BIOS is zero.
Try PC Wizard, see if it reports the same Vcore.
Well, it is a 95W TDP CPU. Of course if both cores ARE running at 3Vcore, the chip should have melted by now or thermal throttled.it's giving out so much heat that I don't think it's operating at it's correct voltage in the first place.
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- Posts: 83
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- Posts: 83
- Joined: Mon Apr 05, 2004 5:45 am
- Location: Sheffield, UK
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