eeksdee Posted October 23, 2023 Report Share Posted October 23, 2023 Been a bit bored as of late and wanted to see how low temps I could get. Microsoft in their infinite wisdom gave the CPU farrrr too much voltage: 1.7V! Nuts! Well the CPU itself runs perfectly fine at 1.3V (lowest the voltage reg will go without messing with the feedback loop). 1.0: Remove the 0ohm resistor on R2E4 1.6: Remove the 2 0ohm resistors on R2E7 & R2E3 The only drawback of doing this, is you'll no longer be able to push the CPU frequency over ~950MHz. The temperature screenshot is from my 1.6, I'm aware that the 1.6 does not have entirely accurate monitoring, but you can see a clear difference. Both were taken at a ~73F ambient with fan running at 20%. Enjoy. 2 5 Quote Link to comment Share on other sites More sharing options...
ChriZz Posted October 23, 2023 Report Share Posted October 23, 2023 Very interesting. There was probably so much excitement back then because the series spread was so large. Who knows. Quote Link to comment Share on other sites More sharing options...
Marty Posted October 23, 2023 Report Share Posted October 23, 2023 ....or, you can set fan speed in a custom BIOS, which you would have if you've modded your console. Quote Link to comment Share on other sites More sharing options...
eeksdee Posted October 24, 2023 Author Report Share Posted October 24, 2023 6 hours ago, Marty said: ....or, you can set fan speed in a custom BIOS, which you would have if you've modded your console. 3 major benefits of undervolting vs. raising the fan speed. Prolonged life of your Xbox Prolonged life of your fan Not having to listen to a noisy fan at higher RPMs Even if you replace with a noctua it's still annoying. 1 Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 25, 2023 Report Share Posted October 25, 2023 23 hours ago, eeksdee said: 3 major benefits of undervolting vs. raising the fan speed. Prolonged life of your Xbox Prolonged life of your fan Not having to listen to a noisy fan at higher RPMs Even if you replace with a noctua it's still annoying. It would end up being cheaper than replacing all the fans with noctuas and running them at 100. Good point. Resistors are fuckin CHEAP. Quote Link to comment Share on other sites More sharing options...
Marty Posted October 25, 2023 Report Share Posted October 25, 2023 You can set a lower fan speed in the custom BIOS. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 25, 2023 Report Share Posted October 25, 2023 3 minutes ago, Marty said: You can set a lower fan speed in the custom BIOS. Yes, but this guy's talking about undervolting to keep temps low without even having to fuck with the fan in the first place. No noise and no trade off with heat is necessary. Quote Link to comment Share on other sites More sharing options...
2kdream Posted October 25, 2023 Report Share Posted October 25, 2023 On 10/23/2023 at 2:12 PM, eeksdee said: The only drawback of doing this, is you'll no longer be able to push the CPU frequency over ~950MHz. I can't get stable OC with my setup so it worth to me, thx Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 25, 2023 Report Share Posted October 25, 2023 14 minutes ago, 2kdream said: You're saying? Either overclock and push the limits or don't Why must anybody have both? lol Quote Link to comment Share on other sites More sharing options...
fox Posted October 25, 2023 Report Share Posted October 25, 2023 Never heard of this. Did you discover it? Quote The only drawback of doing this, is you'll no longer be able to push the CPU frequency over ~950MHz. I've only ever heard of the xbox CPU being 733mhz. Is the above an allusion to xboxes with upgraded CPUs like from that trusty person? Bowl, how does someone even overclock an xbox? I have read most of the stuff out there about modding xboxes, I can't believe I'm missing something this big. 1 Quote Link to comment Share on other sites More sharing options...
prtscn Posted October 25, 2023 Report Share Posted October 25, 2023 1.7v is pretty standard voltage for pentium 3s awesome mod. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 25, 2023 Report Share Posted October 25, 2023 6 hours ago, fox said: Never heard of this. Did you discover it? I've only ever heard of the xbox CPU being 733mhz. Is the above an allusion to xboxes with upgraded CPUs like from that trusty person? Bowl, how does someone even overclock an xbox? I have read most of the stuff out there about modding xboxes, I can't believe I'm missing something this big. Xboverclock. Cerbios tends to reject the clock speed change now, though. I only have it working on 2 of my boxes. The rest are like NAH. Friggin X Codes. Quote Link to comment Share on other sites More sharing options...
eeksdee Posted October 25, 2023 Author Report Share Posted October 25, 2023 21 minutes ago, Bowlsnapper said: Xboverclock. Cerbios tends to reject the clock speed change now, though. I only have it working on 2 of my boxes. The rest are like NAH. Friggin X Codes. Just do it in software... https://github.com/GXTX/XboxOverclock Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 25, 2023 Report Share Posted October 25, 2023 2 hours ago, eeksdee said: Just do it in software... https://github.com/GXTX/XboxOverclock I tried that... The XBE wouldn't load... Quote Link to comment Share on other sites More sharing options...
eeksdee Posted October 25, 2023 Author Report Share Posted October 25, 2023 1 hour ago, Bowlsnapper said: I tried that... The XBE wouldn't load... Sounds like your box is broken or something then. I've never heard of anyone complaining about that. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 25, 2023 Report Share Posted October 25, 2023 20 minutes ago, eeksdee said: Sounds like your box is broken or something then. I've never heard of anyone complaining about that. Lol. Broken or something... 1 Quote Link to comment Share on other sites More sharing options...
eeksdee Posted October 26, 2023 Author Report Share Posted October 26, 2023 18 hours ago, Bowlsnapper said: Lol. Broken or something... Perhaps this will be better for you, my good friend. https://github.com/GXTX/XboxOverclock/releases/tag/v1.3 Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 26, 2023 Report Share Posted October 26, 2023 1 hour ago, eeksdee said: Perhaps this will be better for you, my good friend. https://github.com/GXTX/XboxOverclock/releases/tag/v1.3 ... What is 32bbps and why is that the only description? I'll try it after school. Thanks for being so quick to report on the release! 20 hours ago, eeksdee said: Sounds like your box is broken or something then. I've never heard of anyone complaining about that. That's what I told her. Quote Link to comment Share on other sites More sharing options...
Dempsey_86 Posted October 26, 2023 Report Share Posted October 26, 2023 On 10/23/2023 at 2:12 PM, eeksdee said: Been a bit bored as of late and wanted to see how low temps I could get. Microsoft in their infinite wisdom gave the CPU farrrr too much voltage: 1.7V! Nuts! Well the CPU itself runs perfectly fine at 1.3V (lowest the voltage reg will go without messing with the feedback loop). 1.0: Remove the 0ohm resistor on R2E4 1.6: Remove the 2 0ohm resistors on R2E7 & R2E3 The only drawback of doing this, is you'll no longer be able to push the CPU frequency over ~950MHz. The temperature screenshot is from my 1.6, I'm aware that the 1.6 does not have entirely accurate monitoring, but you can see a clear difference. Both were taken at a ~73F ambient with fan running at 20%. Enjoy. Did you stress test your consoles after this mod, to verify if the xbox runs stable with the lower voltage? Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted October 26, 2023 Report Share Posted October 26, 2023 On 10/25/2023 at 1:13 AM, fox said: Never heard of this. Did you discover it? I've only ever heard of the xbox CPU being 733mhz. Is the above an allusion to xboxes with upgraded CPUs like from that trusty person? Bowl, how does someone even overclock an xbox? I have read most of the stuff out there about modding xboxes, I can't believe I'm missing something this big. Btw, there are other upgrades you can do if you have the tools. I have 3 cpus and 10 interposers, but I'm scared to try it, honestly. I need a 40 dollar console, for one thing. But I'd rather start with a CPU I can BGA straight onto the mobo, rather than fucking with the interposer. I could buy an upgraded console for 1000 bucks... But fuck that. I only want one I've done myself. Not all are 1.4ghz. SL6BY and one other is 1.4. Both require the interposer though... Sigh... Quote Link to comment Share on other sites More sharing options...
eeksdee Posted October 26, 2023 Author Report Share Posted October 26, 2023 3 hours ago, Dempsey_86 said: Did you stress test your consoles after this mod, to verify if the xbox runs stable with the lower voltage? Of course. On both system I've let them run for many hours under 100% CPU load. 1 1 Quote Link to comment Share on other sites More sharing options...
SnowDome Posted February 3 Report Share Posted February 3 I'm curious if anyone else has attempted this? I would love to know if this has any long-term negative effects on components or any possible downsides, random crashes in games, slowdowns perhaps? Almost sounds to good to be that simple Quote Link to comment Share on other sites More sharing options...
PRince404 Posted February 3 Report Share Posted February 3 6 hours ago, SnowDome said: I'm curious if anyone else has attempted this? I would love to know if this has any long-term negative effects on components or any possible downsides, random crashes in games, slowdowns perhaps? Almost sounds to good to be that simple I wanted to do this aswell but I have the same concerns as you lol. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted February 3 Report Share Posted February 3 6 hours ago, SnowDome said: I'm curious if anyone else has attempted this? I would love to know if this has any long-term negative effects on components or any possible downsides, random crashes in games, slowdowns perhaps? Almost sounds to good to be that simple I doubt there would be slowdowns if you did this. Although you are running at a lower voltage, your clock speed is still the same. It is possible that there may be lockups when undervolted, but I'm not sure if this is going to result in it. Maybe you could buy a used (":broken" "parts" ) console and try it out. Quote Link to comment Share on other sites More sharing options...
PRince404 Posted February 4 Report Share Posted February 4 13 hours ago, Bowlsnapper said: Maybe you could buy a used (":broken" "parts" ) console and try it out. Wait, is it possible for this mod to kill your CPU? Quote Link to comment Share on other sites More sharing options...
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