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Which is Most Accurate?

T

Treeburst155

Member
Hi guys!

I set my CPU core voltage to 1.75 volts in the BIOS. Both "Motherboard Monitor" and "VIA Hardware Monitor" show the core voltage as 1.85. Could the BIOS setting of 1.75 actually be supplying 1.85 volts? I'm just curious because I don't want to go past 1.85. I'm running an Athlon-C 1200 AXIA at 1360 with the default voltage setting (1.75). I'd like to go for more, but that depends on whether I'm already at 1.85 or not. BTW, I'm using the stock HSF with Arctic Silver II. Both monitors mentioned above are showing 44C under extreme load. I think I can squeeze a bit more out of the CPU and stay under 50C, but I'll have to up the voltage. Is it extreme voltage itself that kills CPUs or is it the heat associated with higher voltages? Thanks!!

Treeburst155 out.
 
Well, check the BIOS hardware monitoring section....

In there it should tell you all the voltage "readings". These should match MBM readings. There are a lot of mb's which add .04 or so V to the CPU vcore, but i've never heard of a .1V addition.... check it out there, though...

And yeah, voltage increase leads to mroe heat increase than just mhz overclocking.



Mike
 
Thanks, Mikewarrior2!

The hardware monitor in the BIOS also reports 1.85 volts. I suspect I'm already at or near 1.85 inspite of what the voltage is set for in the BIOS. Can I go as high as I want on the voltage as long as the heat stays down, or does the high voltage itself damage the CPU regardless of heat?



 
yeah, you can basically go as high as you want, but I personally wouldn't 😉...

I'm not one for pushign the voltage past 2.0 regardless of cooling. However, if you feel like your cooling setup is up for the massive cooling task, the go for it.

My personal limit is around 2.0, or preferably lower. (just for example, a 2.1V Xp1600 puts out ~90W, whereas a 1.85V at that speed puts out ~71W).


Mike
 
Thanks again for all the help. Further research shows that my Iwill KK266 Plus puts out .09 to.10 V more than is selected in the BIOS if I don't use "auto". This from the Iwill forum at amd.com. Just for fun I dropped the voltage .025 and I'm still stable at 1360 (10 x 136) with monitors reading 1.82 V. I then went back up to 1.85 (1.75 in BIOS) and tried to boot at 1428. I got a POST, but it hung during OS boot. I'm tempted to try 1.875 (1.775 in BIOS) and go for the 1428 again. Am I to understand that, up to a certain point, I can push the voltage as long as I can control the heat? How about 1.9 V at 48C under load ? Would I be pushing it too hard? I want this CPU to last three years. Thanks again for all your time.

 
What kind of cooling setup do you have? The KK266 series of boards does not read temps very well (ie reads among hte lowest of socket-a boards).....



Mike
 
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