Not having an identical motherboard, I can't tell you exactly what they are (the missing ones), but some investigations can be done, many motherboards used similar components, first of all we need to understand what circuit it is?
This can be found with a tester, checking there will be a pin connected directly to the power supply socket, it will probably be a +5V, or a +12V.
Then you have to find motherboards with similar circuits, and see what they are, but certainly the best thing is to find images of an identical MB, unfortunately I don't think it's easy to find an identical board, you can try in some advert, if there are the the images can be very useful, or you can ask the seller if he can send you a detail of that area.

Try asking here, there is one for sale, maybe the seller can send you a detailed image, where you can read what is written, or maybe he can tell you.
I hope it can be useful to you:

https://www.ebay.com/itm/354833876362

In the end I managed to get it working... a bit (read: HUGELY) unorthodox method but it works.

Excellent congratulations.
If you want to share, as you did, I would gladly read, even just out of curiosity, maybe I could get inspiration for some MB, which doesn't work.

'ere we go. I had found the exact type of circuit on a working Soyo 6BA+IV - diode + 2x MOSFETs.

Issue: no heatsinks.
Ghetto fix that likely violates certain Geneva conventions: use the MB holes as heatsink for SMD FETs.

I harvested two FETs off a dead Jetway 7BXAN r2.1, as well as the diode, and managed to get them soldered in place of literal thru-hole components.

Testbed components: GF4 Ti4200, PC100 SDR, Katmai P3.

I will likely switch the old style FETs for newer and smaller ones off something from the P4 - C2D era (assuming I can find any that meet the original specs from Soyo - 60N03S) and call it a wrap.

Excellent work, congratulations.
It seems like a nice card, even if it is not from a famous brand, it should be interesting if the BX can go beyond 100 MHz, I also have a Soyo BX, currently it seems to have a PII 300, as soon as I can I want to try to go up to the 750 or 850 MHz, but maybe I could go with FSB 133.

Yeah, Lucky Tech boards usually seem to be of rather good quality. I have a MVP3 based board (the famous P5MVP3-99x known in almost all of Romania) running a K6-II+ 550. Fast, reliable and stable. I also have a 370 based P6VBX7 (Baby-AT), which is rock solid, despite using VIA 691.

I did notice there's a 133 FSB setting printed onboard, so if I can get 2x P09N03 in place of the big azz FETs used here, I might take a stab at a 800EB on it (not before updating the BIOS first though)

After that, I suppose I'll do a comparision with my ABIT BE6-II using the slotket. Soyo is out of the question due to the clock generator not being able to handle 133FSB (well, at least not my 6BA+IV, that is.) and the P2B I own is a early revision which would require a HIP6xxx VRM overhaul.

What does the correct component look like as originally intended?

Kahenraz wrote on 2023-12-21, 01:13:

What does the correct component look like as originally intended?

Thru-hole styled 60N03 equivalent MOSFETs + small vertical black heatsink.

As noted, I will likely swap in some P09N03 FETs from a newer mainboard in place of the current Ph55 FETs used here.

Well, replaced the FETs today, from PHB55N03LT to NIKOS P0903BDG off a dead 9800GT (bad GPU core).

POSTs just as well as it did with the previous 55N03 FETs. I replaced the old 470uF Canicons with polymers.

Up next: figuring out how to run a 1GHz FSB133 Coppermine on it, and a cap overhaul. Oh, and hopefully a heatsink that'll allow me to use all 3 SDR slots.

I see these in the same orientation. Are they just cooler running FETs?

Kahenraz wrote on 2023-12-22, 16:47:

I see these in the same orientation. Are they just cooler running FETs?

That's just how the design was made - 2x MOSFETs and a Diode (going off the Soyo 6BA+IV design, as both the LT and Soyo use HIP6004 drivers).

As for cooler running - I suppose they're cooler now, as I removed the need for a heatsink and instead opted to have the board's large ground planes cool off the FETs. That, and they were the closest match to what the Soyo used in its design.

PCChips did something quite similar on the M577 - one of the FETs close to the CPU is silkscreened for both newer SMD technology (as to what I used here) and older thru-hole FETs.