VOGONS


First post, by XeniumMods@gmail.com

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Hello Vogonians,

I come from the OGXbox Modding community and am currently looking into CPU upgrades for the console.
Currently there is an interposer board by "N64freak" that allows one to install a desktop taulatin CPU to
a mobile coppermine socket/footprint. (I thought this might be interesting to some here)

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What I would like to do is create an interposer board to fit mobile taulatin CPU's to original xbox consoles.
I came across this site after seeing this thread: "Re: Mobile Pentium 3 - Socket 370 adaptor"
I figured this might be the best place to start discussing such an idea...

This is literally my starting point for looking into this and
I was hoping the community here could help give me some ideas.

Cheers, Nem

Reply 1 of 5, by rasz_pl

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You, and some vogoners might appreciate JTAG 'Hacking' the Original Xbox in 2023 https://blog.ret2.io/2023/08/09/jtag-hacking- … inal-xbox-2023/
https://github.com/Necrosys/x86-JTAG-Information
Author of above also did cpu upgrade using same N64freak interposer (https://github.com/N64-Freak/Xbox-CPU-interposer) https://www.reddit.com/r/originalxbox/comment … t_games_do_you/

Open Source AT&T Globalyst/NCR/FIC 486-GAC-2 proprietary Cache Module reproduction

Reply 3 of 5, by Oetker

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rasz_pl wrote on 2023-08-11, 16:44:

You, and some vogoners might appreciate JTAG 'Hacking' the Original Xbox in 2023 https://blog.ret2.io/2023/08/09/jtag-hacking- … inal-xbox-2023/
https://github.com/Necrosys/x86-JTAG-Information
Author of above also did cpu upgrade using same N64freak interposer (https://github.com/N64-Freak/Xbox-CPU-interposer) https://www.reddit.com/r/originalxbox/comment … t_games_do_you/

Thanks, that was an interesting read.

Reply 4 of 5, by elszgensa

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Why are you considering a mobile Tualatin? They don't quite reach the max speed of their desktop counterparts (1.33 vs 1.4 GHz) and have a lower TDP (22 vs 32.2 W) - though I'm not sure whether thermal throttling would be an issue with a decidedly non-mobile-sized Xbox heatsink on there, and them being able to run at lower voltages should help too, but still - if you try that kind of risky upgrade, might as well go all the way, no? Is it because of prices/availability, are there technical reasons I'm not seeing, or is it a because I can (or want to learn) thing?

Reply 5 of 5, by XeniumMods@gmail.com

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elszgensa wrote on 2023-08-12, 01:22:

Why are you considering a mobile Tualatin? They don't quite reach the max speed of their desktop counterparts (1.33 vs 1.4 GHz) and have a lower TDP (22 vs 32.2 W) - though I'm not sure whether thermal throttling would be an issue with a decidedly non-mobile-sized Xbox heatsink on there, and them being able to run at lower voltages should help too, but still - if you try that kind of risky upgrade, might as well go all the way, no? Is it because of prices/availability, are there technical reasons I'm not seeing, or is it a because I can (or want to learn) thing?

I'm glad you asked...

(1) - Since one of my competitors already does a desktop interposer board, I wanted to try and bring something different to the table.
Like you said there's no real problem in just using a desktop CPU but why would you do a CPU upgrade at all other than bragging rights?
You could almost say the same thing about RAM upgrades for the console. Is there any real benefit I don't know but if people want to
pay me to install it I'm not going to say no. I just try and give the people what they want, they seem to be interested in this idea...

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(2) - Fitment and cooling of the desktop board can be difficult. People are using the existing heatsink along with a 3D printed mounting bracket.
However, this raises the heatsink up to the point where it makes contact with the HDD caddy. Requiring either modifying the heatsink or caddy.
Using a Taulatin Mobile CPU could keep the heatsink low enough to avoid any additional modification. I recently did a 3D printed design which
allows the installation of 2x 80mm fans over the CPU and PSU for additional cooling. My testers are reporting excellent results...

You can follow my recent works over at OGXbox.com: "https://www.ogxbox.com/forums/index.php?/topi … v3xx-sneakpeak/"

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(3) - In regards to power, a desktop CPU on it's own might be fine but what worries me if you consider all mods that can be installed to a OGXbox console,
modchips, HDMI mods, ARGB leds, dual 80mm fans, etc... I begin to worry about the capability of the aging PSU's, there only like 130-150 watt.
More power efficient CPU could be of a benefit here...

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(4) - With modified bioses it is possible to overclock the CPU. I've had reports of someone overclocking desktop 1.4Ghz CPU to 1.5Ghz.
With that I'm sure the mobile 1.33Ghz CPU could be overclocked to 1.4Ghz or more...

(5) - Well this will definitely be a learning experience for me as I've never done anything with CPU's like this before, not even sure where to begin really...