TheMysteriousGray wrote on Today, 02:53:

Understandable. If all else fails, I saw a decent deal for a Socket 370 motherboard on eBay that 100% supports Coppermines, for cheaper than any of the voltage-regulating slotkets I saw. If BIOS flashing doesn't work, I'll bite after I get paid this Friday.

I think that's a pretty great idea if you're not attached to Slot 1 or 440BX and want a fast Coppermine with stability. Which motherboard is it? If you keep looking you might be able to get a good deal on a combo with CPU and PC133 sticks, that way you don't have to potentially pay more for a cooler and everything else separately just to make the switch.

As for the BIOS, it's mostly just my curiosity wanting to see if it'll change anything that could give some better clue as to what's happening. But even if you were to get it to POST and even if the board decided it's okay with 1.8V, at the end of the day it's still 133fsb on a first revision 440BX board with original caps I'm assuming? So I feel like it would only be an exercise in frustration more than something to enjoy...

Also, the BH6 is still a great board for the Katmai. I wouldn't get rid of it or anything, keep it for dedicated DOS gaming since it has ISA slots.

I don't think you mentioned what Slotket you are using.

Show pics with both cpus next to it.

Coppermine were not the same pinout.

myne wrote on Today, 06:05:

I don't think you mentioned what Slotket you are using....

TheMysteriousGray wrote on Yesterday, 16:07:

I don’t have any slotkets ATM, only two native Slot 1 PIIIs. If it will help tho, I can take photos of both when I get home from work.

Ahhhhh
Right. Go with the bios update.

If it is voltage, as in the cpu itself says 1.7v, changing to 1.8 should be possible by blocking vid1 with sticky tape or nail varnish

1.9 by blocking vid2, 2v by blocking vid 1 & 2

https://www.mouser.com/catalog/specsheets/int … on_24445209.pdf

sunkindly wrote on Today, 04:41:

I think that's a pretty great idea if you're not attached to Slot 1 or 440BX and want a fast Coppermine with stability. Which mo […]
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TheMysteriousGray wrote on Today, 02:53:

Understandable. If all else fails, I saw a decent deal for a Socket 370 motherboard on eBay that 100% supports Coppermines, for cheaper than any of the voltage-regulating slotkets I saw. If BIOS flashing doesn't work, I'll bite after I get paid this Friday.

I think that's a pretty great idea if you're not attached to Slot 1 or 440BX and want a fast Coppermine with stability. Which motherboard is it? If you keep looking you might be able to get a good deal on a combo with CPU and PC133 sticks, that way you don't have to potentially pay more for a cooler and everything else separately just to make the switch.

As for the BIOS, it's mostly just my curiosity wanting to see if it'll change anything that could give some better clue as to what's happening. But even if you were to get it to POST and even if the board decided it's okay with 1.8V, at the end of the day it's still 133fsb on a first revision 440BX board with original caps I'm assuming? So I feel like it would only be an exercise in frustration more than something to enjoy...

Also, the BH6 is still a great board for the Katmai. I wouldn't get rid of it or anything, keep it for dedicated DOS gaming since it has ISA slots.

It’s an Asus CUBX. Still 440BX, but it seems to natively support Coppermine CPUs and I actually have a Socket 370 PIII 966 sitting in a baggie that I never used. My only sound card is an AWE64 Value so my mobo options are limited to ones with ISA slots, not that I’m complaining considering how tricky it is to get PCI cards to be DOS-compatible.

TheMysteriousGray wrote on Today, 12:48:

[...]

It’s an Asus CUBX. Still 440BX, but it seems to natively support Coppermine CPUs and I actually have a Socket 370 PIII 966 sitting in a baggie that I never used. My only sound card is an AWE64 Value so my mobo options are limited to ones with ISA slots, not that I’m complaining considering how tricky it is to get PCI cards to be DOS-compatible.

The "CU" part of the CUBX name is Asus' way of saying they engineered it specifically for Coppermine, so no worries there. The board is a very late i440BX board, so has all the options you'd want for running at 133MHz FSB like 1/4 PCI divider and settings up to and over 133MHz. What you don't get is a guarantee it will actually run at 133MHz and be stable. I had one back in the day with a P3-700E. It wouldn't go over 124MHz FSB (running at 868MHz) and wasn't totally stable there either. I assumed the CPU was limiting, but when I got my hands on a P3-1000EB (and some nice CL2 PC133 DIMMs) it still wouldn't go any faster 🙁 Still, on late rev BX boards that's very much the exception, most will happily go to 133MHz and sometimes quite a bit over that.

If you even suspect you'll be doing something with DOS on a board, definitely go with at least one ISA slot. That said, if you already have a Katmai system with lots of ISA slots, even the last, most demanding DOS games are well covered, so it might be worth looking for something with native 133MHz support even if it doesn't have an ISA slot. Iirc there's an Abit SA6 on Amibay at the moment that would do very nicely and has AC'97 integrated sound. You could then later add a PCI sound card chosen for Win98 features, like an Aureal Vortex 2 or (more boring, but easier to find) an SBLive.

I have a CUBX-L, with an added "3.3V voltage booster", like a full CUBX.
And modded for Tualatin support.
And this is not my favorite board. 😀

If the memory problems can still be solved (REG ECC or sorting through all available fancy RAM with CL2), then 89 MHz on AGP for 440BX is basically unsolvable.
Everyone starts with Tualatin + 440BX because it's "classic". But I'd prefer VIA694T with 4 RAM slots from a decent manufacturer.
PS My CUBX-L holds 133 MHz with any three memory sticks (of those I have). With four - only 124 MHz, and this is very annoying.