socket PIII @ 700 core volt/ temp

[abe3]

Greetings,
Just installed a PIII 700 and have set everything in BIOS to default while i let it burn for a while. Several questions for the more astute O/Cers.
1) At "Normal" (in BIOS) Vcore is set for 1.82 (per Sandra) - Isnt that a tad high for a 700?
2) How long should you "burn in" a CPU and does it really help that much?
3) My temp under Sandra's Burn-In test is about 99 degrees Farenheit - that seems good for now - but its not O/Cd yet. Will it probably go up a little or a lot @ 933?
Thanks for your comments...

[MilkPowder-2]

yeah the burn-in method is vary depend how you want to do it. There's no fixed rule as to how long you should burn-in but if you burn-in your CPU for a better overclockability@ lower voltage, you should leave it running at default speed and up the Vcore to say 1.85V+or - for your 700E CPU. Let it burn in at least 1 or 2 days and if you see no improvement, continue burn-in for a week or so. Just keep the cooling under control so your CPU temp. OC'ing it to 933 and do a burn-in isn't good method. but you could do that for short amount of time just to see how stable your system is. You can also underclock the FSB to 66mhz FSB and set your Vcore as high as it'll allow you i.e. 1.90V or 1.95V but no more.

[Yodums]

Originally posted by abe3
Greetings,
Just installed a PIII 700 and have set everything in BIOS to default while i let it burn for a while. Several questions for the more astute O/Cers.
1) At "Normal" (in BIOS) Vcore is set for 1.82 (per Sandra) - Isnt that a tad high for a 700?
2) How long should you "burn in" a CPU and does it really help that much?
3) My temp under Sandra's Burn-In test is about 99 degrees Farenheit - that seems good for now - but its not O/Cd yet. Will it probably go up a little or a lot @ 933?
Thanks for your comments...

1.8vcore is ok, pretty average. What's high is 1.95v or so.

A burn-in time is not limited. A burn in is to provide many things ie your temperatures, to get the "extra" and more. So always keep burning and there are burn-in programs which will also do more like Seti or Folding. Seti is the search for intelligence and Folding is to cure diseases.

Try getting MotherBoard Monitor because Sandra doesn't always give correct CPU temperatures.

[Godfodda]

Originally posted by abe3

1) At "Normal" (in BIOS) Vcore is set for 1.82 (per Sandra) - Isnt that a tad high for a 700?


That does seem a bit high since the Intel Database here (http://support.intel.com/support/processors/sspec/p3p.htm) shows that it should be either 1.65 or 1.7 depending upon which version you have. You might want to double check that voltage with a hardware monitor or with MBM5 which you can get here (http://www.aoafiles.com/). Sandra is often a bit flakey, but if it's right, you may want to manually set the vcore while you're running at stock.

[Yodums]

Also I heard a good method to burn-in your computer is unclocking it and upping the voltage since the method I heard was lower fsb higher voltage.


Happy Holidays

[Pinky]

One thing concerns me -- cooling.

If you're using the stock retail intel heatsink, you won't want to go above 1.90V I have built one of these systems in the past, a 700 at 933mhz with stock stuff, and if I pushed the vcore above 1.85 it would generate more heat that the heatsink could dissipate.

Two things are available...

1 -- better cooling, even if it's just a Glaciator or Pal Alpha with a decent fan, anything with a copper base would help with higher voltages.

2 -- proper burn in... what I mean is to "under" clock the chip (say, running at 66mhz bus) and as cool as possible (meaning leave the case sides off if need be) while the CPU is at full load (folding or using Sandra/Toast/whatever for burn in).

Some other things to consider are case cooling... if there's only hot air in the case there's nothing to cool the heatsink... and the proper temps I found for this chip are anything below 50C. The build I was referring to, because of the retail heatsink and poor case design, runs at 48C under full load at 1.85V and is 100% stable, so these chips can take minor abuse.

Another factor is the thermal paste being used. I was using Radio Shack compound for the longest time, but found I got better results with Arctic Silver II (or its equivelant). It's relatively inexpensive and could mean the difference in stability and cpu life.

Hope this helps some.

[abe3]

Thx guys...its now running at 933 and under full load its only hitting in the mid to high 90s F. (less than half the rated temp)
BTW, Im using Arctic Silver and the Antec "orb" clone.
Not going to push it up too much though...a little, of course ;-)