Solve : Processor Core voltage vs Motherbowrd??

1.	Solve : Processor Core voltage vs Motherbowrd??
Answer» I'm trying to build a system "on the cheap" from used parts, some from old systems, some from eBay. (Yeah, IKNOW, cabveat emptor.) Here's my question. I'm now building two systems with INTEL D845GERG2 motherboards. The manual indicates that it can accept P4 CPUs of a varying range. I've got that covered. One CPU has a 533 MHz bus and core voltage of 1.5v. That system works. The other system has a 400 MHz bus, and a CPU with core voltage of 1.75v. This one does NOT work. I have appropriate speed of memory for both systems, have reset the BIOS etc. When I press the Boot switch, the non-working system fires up for a fraction of a SECOND, shows FF on the BIOS status card I've installed, then shuts down. Is core voltage important, needing to be matched to mobo? Neither system has any jumpers PERIOD other than BIOS reset. (Yes, I've done that.) Quote ...Is core voltage important, needing to be matched to mobo? Neither system has any jumpers PERIOD other than BIOS reset. (Yes, I've done that.) Yes, core voltage must be "matched" to the motherboard. In all newer motherboards, this is done through the "soft BIOS". BIOS reset should default to a SAFE state, probably at a slower speed. If motherboards are identical and you've swapped CPU's, memory, etc and one still doesn't work, it's probably dead.

Answer»

I'm trying to build a system "on the cheap" from used parts, some from old systems, some from eBay. (Yeah, IKNOW, cabveat emptor.)

Here's my question. I'm now building two systems with INTEL D845GERG2 motherboards. The manual indicates that it can accept P4 CPUs of a varying range. I've got that covered. One CPU has a 533 MHz bus and core voltage of 1.5v. That system works. The other system has a 400 MHz bus, and a CPU with core voltage of 1.75v. This one does NOT work. I have appropriate speed of memory for both systems, have reset the BIOS etc. When I press the Boot switch, the non-working system fires up for a fraction of a SECOND, shows FF on the BIOS status card I've installed, then shuts down.

Is core voltage important, needing to be matched to mobo? Neither system has any jumpers PERIOD other than BIOS reset. (Yes, I've done that.) Quote

...Is core voltage important, needing to be matched to mobo? Neither system has any jumpers PERIOD other than BIOS reset. (Yes, I've done that.)

Yes, core voltage must be "matched" to the motherboard. In all newer motherboards, this is done through the "soft BIOS". BIOS reset should default to a SAFE state, probably at a slower speed.

If motherboards are identical and you've swapped CPU's, memory, etc and one still doesn't work, it's probably dead.

Solve : Processor Core voltage vs Motherbowrd??

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