Something for voltage on slot 1 cpus?

[RainMaQer]

Ok... I keep reading about the "wire trick" to up the default vcore on s370 chips. Is there a way to do something similar to a slot 1 cpu?

 

[12am]

not too the best of my knowledge you cant

 

[SP]

Sure you can. slot 1 coppermines were the same as FCPGA coppermines they just came in a different package. Anyway, all the same pins are still there. They're just on a card edge connector and maybe layed out a little differently. Download the Pentium III datasheets from Intels website and read through it. It should have all the details you need along with diagrams showing the locations of the same pins on a slot1 (or SC242 as they like to call it) processor.

Try here. "Pentium® III Processor for the SC242 at 450MHz to 1.13 GHz Datasheet" is the one you want to download.

 

[RainMaQer]

I don't have a slot 1 anymore... just curious if it was possible. Seemed logical that it should be possible... I was thinking of a way that someone could increase the default vcore on a Dell for instance... then be able to overclock by changing the default speed of the chip... like 133 instead of 100... I saw another thread about that... perhaps it would be possible to do the same for a slot 1 for that as well.

 

[SP]

I don't have a slot 1 anymore... just curious if it was possible. Seemed logical that it should be possible... I was thinking of a way that someone could increase the default vcore on a Dell for instance... then be able to overclock by changing the default speed of the chip... like 133 instead of 100... I saw another thread about that... perhaps it would be possible to do the same for a slot 1 for that as well.

Indeed it is possible. It's all in the datasheet that I linked to above. Just look for the Bsel0 and Bsel1 pins. It should be mentioned however that in order for this to work the Motherboards clock generator must be capable of producing the target clock frequency. That is if you had a really old board that didn't have a PLL capable of producing a 133Mhz FSB clock then it wouldn't work. However, if the board is capable of taking a 133Mhz FSB processor then it must have a clock genrator capable of it. The same thing is also true about voltage. If you want to use a certain voltage then the VRM (or Voltage regulator Modules) must be capable of producing that voltage. There were some really old boards that wouldn't support coppermines when they came out because their VRMs couldn't produce the new lower voltages coppermines needed.

 

[asw7576]

Slot 1 voltage pin modification

Yes, you can simulated different voltage by "taping" the pins. You can cover the VID pins and get the desired voltage: 2.4v, 2.2v, 2.0v,

VID4 VID3 VID2 VID1 VID0 VCCCORE
A121 B119 A119 A120 B120
0 0 1 0 1 1.80
0 0 1 0 0 1.85
0 0 0 1 1 1.90
0 0 0 1 0 1.95
0 0 0 0 1 2.00 (default P2)
0 0 0 0 0 2.05
1 1 1 1 1 No Core
1 1 1 1 0 2.10
1 1 1 0 1 2.20
1 1 1 0 0 2.30
1 1 0 1 1 2.40

"0" means: "closed internally" or "logic low" or "short to ground"
"1" means: "open" or "logic high" or "NOT short to ground"

For examples, by taping A121, B119, A119 pins, you will get 2.20v because A121, B119, A119 cannot "short to ground" thus creating "1" position.

Another examples, by taping A121, B119, A120 pins, you will get 2.40v.

Read more on: http://www6.tomshardware.com/cpu/98q4/981215/index.html

Good Luck.