I think we need to know more about your QDI Legend board to be able to answer that.

If its the 440LX version at least the Mendocino version of Celeron up to 533 MHz should work, with luck even the Coppermine Celerons with 66 MHz FSB up to 766 MHz.

Get a FCPGA (not PPGA) slotket with voltage control as if you want to use a Coppermine Celeron there is a good chance you have to jumper the slotket for 1.8V.

It's a P6I440BX/B1S. The adapter has no option on board just the write "FC-PGA Pentium III CPU card".

If the motherboard supports the voltage I think that combination should work with all 66 MHz and 100 MHz FSB Coppermine CPUs, Celeron or not.

If the motherboard dosnt support the voltage you need to pin mod or get a slotket with voltage selection. The Mendocino Celerons should work in any case but you might have to change a jumper or two on the slotket.

Flashing the latest BIOS is probably a good idea.

I think it's jumperless, I don't see any jumpers. Maybe in the bios, I am gonna try it....😁

With the Celeron 466 Socket370 it doesnt boot... let's try with the Celeron 700.

386SX wrote:

With the Celeron 466 Socket370 it doesnt boot... let's try with the Celeron 700.

A Celeron 466 should work but perhaps your slotket is FCPGA only, normally there is one or two jumpers on the slotket to configure it as PPGA or FCPGA. There is also often a jumper on the slotket to force 66 or 100 Mhz FSB, a Celeron 466 would not post at 7x100 Mhz.

The only Slot-1 motherboard I own that wont run a Mendocino Celeron is a first generation IBM i440LX board from an Aptiva, some motherboards dont like some slotkets though.

Basically, with the Celeron 466 doesn't boot, with the Celeron 700 it boot but hang on the qdi logo, with a Slot Celeron 333 it boot ok and go to bios where you can set this SpeedEasy mode where select multiplier and bus.

386SX wrote:

Basically, with the Celeron 466 doesn't boot, with the Celeron 700 it boot but hang on the qdi logo, with a Slot Celeron 333 it boot ok and go to bios where you can set this SpeedEasy mode where select multiplier and bus.

It sounds like the QDI BIOS people were real idiots and wont let the board boot at unexpected multipliers, I think you perhaps need to find a BIOS update.

Or your board dosnt like the slotket, was the Celeron 333 Socket-370 or Slot-1?

I think a Celeron 700 probably would post but then lock up at 10.5x100 so there is also a chance your board tries to post at 100 MHz FSB with the slotket. Are you sure the slotket dosnt have a jumper or two?

I tried booting with the SLOT Celeron 333, saving the bios as 66 x 7 = 466 and shutdown. Then changing the cpu and still no boot. I thinnk it's not a mainboard problem but the slotket that seems to be built for Pentium 3 only (it has also a Cyrix option that is already soldered off and with missing components..).
By the way already happy the board seems to be in perfect status and usable for some configs. I look for the latest bios and update it.

386SX wrote:

I tried booting with the SLOT Celeron 333, saving the bios as 66 x 7 = 466 and shutdown. Then changing the cpu and still no boot. I thinnk it's not a mainboard problem but the slotket that seems to be built for Pentium 3 only (it has also a Cyrix option that is already soldered off and with missing components..).
By the way already happy the board seems to be in perfect status and usable for some configs. I look for the latest bios and update it.

Yea its probably an issue with the slotket.

If I would guess I would say the slotket forces 100 MHz FSB or simply the FSB detection dosnt work as it should with the combination of slotket and motherboard. Even setting 66 MHz FSB in the BIOS with another CPU and saving is no guarantee as the board detecs a new (100 MHz FSB) CPU and ignores the setting.

When you happen to find a better slotket with FSB and voltage settings I think you will have better luck, I like the "MSI MS-6905 Master".

IIRC A proper slotket should have a voltage clamp. Because some I/O channels do not have the same voltage spec., when comparing slot-1 to Socket 370. Cheap slotkets are lacking this voltage clamp and I found it to cause incompatibilities with certain motherboards.

I am not talkin about VRM 8.4 / Vcc and the Powerleap. I am talking I/O voltage.

gerwin wrote:

IIRC A proper slotket should have a voltage clamp. Because some I/O channels do not have the same voltage spec, when comparing slot-1 to Socket 370. Cheap slotkets are lacking this voltage clamp and I found it to cause incompatibilities with certain motherboards.

Another good reason to try to find a "MSI MS-6905 Master", a German Ebay shop used to sell them but I think they are out of stock. I bought 10 but Im not parting with a single one of them as Im pimping most of my Slot-1 builds with pin modded Tualatins and Tualerons or if that is not possible Coppermines! 😀