XG-DLS? That's a very good board. Did you get all the mounting hardware? The board is designed to use 2.8V processors. The 5/12v are not going to work, and using 5/12v cpus are likely to blow up the cpu and/or motherboard voltage regulation. Its something I've wanted to test, as Intel SHOULD be smart enough to allow the chips to not kill boards at a minimum.

Also, the Slot-2 terminators are universal.

luckybob wrote on 2026-02-17, 00:17:

XG-DLS? That's a very good board. Did you get all the mounting hardware? The board is designed to use 2.8V processors. The 5/12v are not going to work, and using 5/12v cpus are likely to blow up the cpu and/or motherboard voltage regulation. Its something I've wanted to test, as Intel SHOULD be smart enough to allow the chips to not kill boards at a minimum.

Also, the Slot-2 terminators are universal.

Last I tried a 5/12V CPU on it, it did nothing. Turned on but no POST.

I've never wanted to test the theory. the risk/reward just isnt there for this hardware.

Klamath runs on 2.8V, Deschutes on 2.0V. What are 5/12V cpu's?

The cpu's voltage is identified by some of its pins, the VRM should either provide the voltage requested or none at all (like with the Coppermines in slockets on boards that don't do 1.7V)

What am I missing here?

The 5/12v cpus have internal voltage regulators. Meaning they are designed to connect directly to the 5/12v rails of the psu.

The xg-dls will run with any 2.8v slot 2 xeon. (Bios update required for >550mhz)
The 2.0v chips are just normal consumer p3 processors and typically run with 133mhz fsb and are not compatible with the xg-dls.

That said, if you can get the motherboard VRM & BIOS to play nice, there's no electrical reason the 133fsb chips won't work. Its an identical concept as running Tualatin on 440BX.

I know the CPU voltage stuff. I running atm 2x 700 MHz Cascades with 4x512 MB ECC on it.

The Backplate and two clamps was include.
Im 3d Printing atm some solutins for it. Will see how this work.
2x SL4XY would be nice but, also thinking about running one SL4XY for win98 voodoo setup.
I maybe start a build thread.

Thats my bracket prototype., the clamps will fit over it and should be enough to hold the CPUs safe.

Jackhead wrote on 2026-02-17, 06:46:

I know the CPU voltage stuff. I running atm 2x 700 MHz Cascades with 4x512 MB ECC on it.

Good, that education was for me... Thanks!

luckybob wrote on 2026-02-17, 06:13:

The 5/12v cpus have internal voltage regulators. Meaning they are designed to connect directly to the 5/12v rails of the psu.

As in they have power connectors - or do they get the 5/12V via the Slot2?

Via the slot.

Converting a 12-5V CPU to 2.8V would be nice..
2.8V CPU are very expensive, the 12V/5V are much cheaper and easyer to find. Even the FSB133 one should be work fine at 100 MHz. I have both variants around . Need to open again and compare. Maybe not a big thing to convert them?

In theory, all you would need to do is bypass the on-board voltage regulator. Pipe the power supply directly to the processor. And maybe it will work.

I tried and it is not easily doable. Did not succeed, need to cut wide traces etc.

Glad that you got the board up and running Jackhead!

thanks Paadam for my dreamboard!
Looks like the brackets i created hold.

- Asus XG DLS
- 4 x 512 MB ECC Reg
- 2x P3 Xeon 700MHz
- Strange God Voodoo5 6000
- SIL3114 for Sata
- Audigy 2 ZS for EAX
- Monster Sound MX300 for A3D

Absolutly love this setup.. Maybe some time in future i can add a 900MHz pair.

I needed some room and was willing to let go as I got Compaq SP750 running (albeit need to find powerful enough PSU to get it running at max power). Will modify the 700 MHz ones to work at 133 MHz FSB.

Jackhead wrote on 2026-02-17, 16:53:

thanks Paadam for my dreamboard! Looks like the brackets i created hold. […]
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thanks Paadam for my dreamboard!
Looks like the brackets i created hold.

The attachment PXL_20260217_164827988.jpg is no longer available

- Asus XG DLS
- 4 x 512 MB ECC Reg
- 2x P3 Xeon 700MHz
- Strange God Voodoo5 6000
- SIL3114 for Sata
- Audigy 2 ZS for EAX
- Monster Sound MX300 for A3D

Absolutly love this setup.. Maybe some time in future i can add a 900MHz pair.

Beautiful!!!

@Paadam
Do you have the pinout for the SP750 power supply?
I have two SP700 boards, but I am lacking the power supply pinout, specially the additional Mainboard connector.
Probably the PS from my AP400 might work?

Nope they are different. I have AP550 (SW400) and it is different also.

For SP750 basically ATX but PWR_OK is different (need to tie to 3.3v) and PS_ON is reversed (system board outputs 3.3v instead of GND, you need some inverter).