Upgrading cpu

7Dodger7

Junior Member
Jun 20, 2001
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I looked everywhere on the net for this info and found none, hoping someone here can help me.
I have an NEC comp. that I bought in early 98 with a 400 mhz pentium 2. I would like to know how high can I upgrade to. The manual and website support say the same thing, but none of this information helps me because at the time, there wasn't anything out there more powerful than a pentium3 at 500mhz. here are the specs I have aquired:

This motherboard utilizes the SEC slot (SLOT1), which is a staggered 242 pin Single Edge Contact slot. This motherboard is designed to be upgradable with any of the following processors:
Celeron 266/66, 300/66
Mendicino 300/66, 333/66
Pentium?II 233/66, 266/66, 300/66
Deschutes 266/66, 333/66, 350/100, 400/100
Pentium?III 450/100, 500/100
The SEC cartridge has a heatsink, either full- or half-size, mounted to it, which cannot be removed without removing the SEC cartridge. The full-size heat sink is supported by the Heatsink Support Base and Top Bar, which secures the heatsink and protects the PCI chipset underneath it. If the heat sink has a fan mounted on it, the fan power supply connector must be disconnected before the SEC cartridge can be safely removed. For processors operating up to 333MHz, the speed of the processor can be set by using the configuration jumper (J8A1) on the motherboard to enable Configuration Mode. (See 872 Motherboard Layout for setting information.) For processors operating at 350MHz or faster, the processor speed will be auto-detected on boot-up.

Lithium 3V
BIOS Intel® E28F002BXT80 2 MBit Flash EPROM
System BIOS by Phoenix
Bus PCI/ISA based system bus (PCI 2.1 compliant)
100MHz maximum bus speed
Cache 32K level 1 cache
Pentium II - 512KB level 2 cache in the Single Edge Contact cartridge
Celeron - 0 or 128KB level 2 cache
Chipset Intel® 82440BX PCI AGP Controller (PAC)
Intel® 82371EB PCI chipset (PllX4E

It seems to be able to take a pentium 3 800 @ 100mhz coppermine, but I'm not sure. I've been looking at prices on pricewatch, but I can't find any information on how high this motherboard can go. Help me out, please>?

 

birddog

Golden Member
Apr 25, 2000
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It looks like it can take Katami PIII's. I think the fastest Katami is 600mhz. The real question for coppermine support is voltage. It is a BX chipset, so the chipset can handle coppermines. You need to see if you can find a newer BIOS to flash that has coppermine support. Coppermines run from 1.6-1.7v. I think Katami's are 2.0v.

Check with NEC about getting the latest BIOS flash. If they have no info, try to find out from them who is the manufacturer of the board (Asus makes alot of OEM boards) & the manufacturer model # (this may be printed on the PCB also).

If you do try to put a coppermine in there, I would try a flip-chip on a slotkit and manually set the voltage on the slotkit).
 

Rafael

Senior member
May 11, 2001
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I agree with BIRDDOG, check the BIOS. Most BX chipsets can support COPPERMINE, and high clocks of Pentium 3.

Raf