I've got an XP2500, the first generation of Barton cores perhaps 18 months old and it pretty much is faster than I need it to be.
I regularly leave the FSB on my motherboard (first gen Asus A7N8X deluxe) set at 100MHz which makes the CPU run at about 1.1GHz which is about where I notice it start to get a bit slower. I only use it for web browsing, playing music and general application based work that doesn't need much more than a 1GHz CPU. If I'm doing video encoding it'll happily overclock to 2.2GHz with an FSB of 200MHz (XP3200) at stock voltage of 1.65v and never crash while working at full load.
Now I'd like to convert the CPU into a low voltage device to save power and hope the case fan which is about 2cm away from the CPU fan, will draw sufficient air over the heatsink to unplug the CPU fan altogether. If it doesn't, I'll make a small shroud.
Now, using Speedfan, it shows the temperature drops a fair bit from XP2500 to XP1900 (166 to 133FSB) but going from 133 to 100FSB it makes negligible difference.
My 1.5GHz IBM Centrino notebook makes a HUGE difference when dynamically underclocking itself to 50MHz and undervoltaging, it runs stone cold and can run for around 5 hours, lock the CPU at 1.5GHz, it brings up the voltage, fan comes on, CPU runs hot and battery life is reduced to about 2 hours.
So I want to reconfigure the bridges to make the MB think its a 133MHz CPU at a lower voltage. The MB wont allow me to go below 1.65v on the CPU. I'd like to know if anyone has successfully undervoltaged their AXP2500 to XP1900 and what voltage was used so I can correctly set the jumpers. Too low it wont boot, too high it'll waste too much power. I'll also change the jumpers to make the MB think it needs a 133MHz FSB so it boots at the slower speed and I can speed it up if need be.
Cheers
I regularly leave the FSB on my motherboard (first gen Asus A7N8X deluxe) set at 100MHz which makes the CPU run at about 1.1GHz which is about where I notice it start to get a bit slower. I only use it for web browsing, playing music and general application based work that doesn't need much more than a 1GHz CPU. If I'm doing video encoding it'll happily overclock to 2.2GHz with an FSB of 200MHz (XP3200) at stock voltage of 1.65v and never crash while working at full load.
Now I'd like to convert the CPU into a low voltage device to save power and hope the case fan which is about 2cm away from the CPU fan, will draw sufficient air over the heatsink to unplug the CPU fan altogether. If it doesn't, I'll make a small shroud.
Now, using Speedfan, it shows the temperature drops a fair bit from XP2500 to XP1900 (166 to 133FSB) but going from 133 to 100FSB it makes negligible difference.
My 1.5GHz IBM Centrino notebook makes a HUGE difference when dynamically underclocking itself to 50MHz and undervoltaging, it runs stone cold and can run for around 5 hours, lock the CPU at 1.5GHz, it brings up the voltage, fan comes on, CPU runs hot and battery life is reduced to about 2 hours.
So I want to reconfigure the bridges to make the MB think its a 133MHz CPU at a lower voltage. The MB wont allow me to go below 1.65v on the CPU. I'd like to know if anyone has successfully undervoltaged their AXP2500 to XP1900 and what voltage was used so I can correctly set the jumpers. Too low it wont boot, too high it'll waste too much power. I'll also change the jumpers to make the MB think it needs a 133MHz FSB so it boots at the slower speed and I can speed it up if need be.
Cheers
