Nice new barton 2500+!

kamina · Post by **kamina** » Mon Feb 16, 2004 10:11 am

I'm just building a rig for a workfriend of mine, and it will be based around a barton 2500+. The computer runs with 1.25v, but fails prime after a while. Now it's doing prime with 1.3v without problems!

Edit: actually, looking at mbm, it's reporting vcore at 1.25 even thouth I have 1.3 selected in bios!

lm · Post by lm » Mon Feb 16, 2004 11:22 am

When you say 'without problems', how long did you actually run prime95?

kamina · Post by **kamina** » Mon Feb 16, 2004 11:29 am

It had been running for about 1 1/2 hours when I left work. (I left it to run)

silvervarg · Post by **silvervarg** » Mon Feb 16, 2004 1:48 pm

The biggest problem I got so far with very low volts is that you get severe problems when cold booting.
So you might need to set a higher vcore in bios and lower the vcore after you have booted. Problem is that if you allow your computer to go into S3 mode you will have the same problem as when you cold boot, so your computer can hang when it is about to return from S3 mode.

Unfortunately the only resonable way for me is to have vcore set so you will safely manage cold boots as well. In stock speed this means somewhere near 1.4Vcore.

nova · Post by **nova** » Mon Feb 16, 2004 4:12 pm

My 2500+ runs at 1.35V wíthout a hitch. It ran prime for 40 hours. Tried at 1.3V but prime failed efter an hour or so.

Edit:
At stock speed

Gxcad · Post by **Gxcad** » Mon Feb 16, 2004 4:17 pm

underclocking (if unlocked) can make these boot even at 1.1vcore I'm sure

. Too bad so many are locked now.

-Ken

nova · Post by **nova** » Mon Feb 16, 2004 4:22 pm

Mine is unlocked but I haven't tried underclocking while undervolting. Really there's no need it runs fine at 1.35V stock speed. I have watercooling on the way as well.

kamina · Post by **kamina** » Mon Feb 16, 2004 10:00 pm

I came to work, and it had failed prime after 3.5 hours...

I set vcore to 1.3v and left it to run prime again. Unfortunatly I only have today to test, and then my workfriend is taking it home, so I'll have to set it at something that works for sure.

edit: I do believe it's a good chip, the color of the core was the same as my t-bred 1700+ that was stable at 1.06v on stock speeds, and 1.22v for 1800mhz. The core is a pure silver without a hint of any other colors!

Gxcad · Post by **Gxcad** » Mon Feb 16, 2004 10:55 pm

1.22v for 1800mhz! Wow thats a great 1700+, mine would need a good 1.45 to do 1.8ghz, I think.

-Ken

silvervarg · Post by **silvervarg** » Tue Feb 17, 2004 2:31 am

Gxcad:
underclocking (if unlocked) can make these boot even at 1.1vcore I'm sure . Too bad so many are locked now.

Sure, you can run 1.1vcore, but I need to go max ~1000MHz to go stable at 1.1vcore. If you like to go in that speed there are better processors to start from. E.g. XP1700+

Kamina:
came to work, and it had failed prime after 3.5 hours...

I set vcore to 1.3v and left it to run prime again. Unfortunatly I only have today to test, and then my workfriend is taking it home, so I'll have to set it at something that works for sure.

Since you are running out of time I defenatly recommend that you increase the vcore to 1.425V. It should run stable at that speed, and you still get a significant decrease in generated heat.
If you do lots of tweaking you might be able to go with slightly lower settings, but that is defenatly border-line values, and I would not do that on a computer that you won't be using personally.

kamina · Post by **kamina** » Tue Feb 17, 2004 11:21 pm

I tested all day with 1.3v, and there was no problems. After running prime for 7 hours, I turned it off for an hour and let it "cool down". It booted up just fine... Finally before I let the girl take it, I raised vcore to 1.35v...

/me crosses fingers and hopes for the best

lm · Post by lm » Wed Feb 18, 2004 7:43 am

My 2800+ runs 11.5*166 (underclocked: normal is 12.5*166) with 1.35V, prime95 runs stable for 10+ hours, didn't yet test longer. Now i think it should run 11*166 (speed of 2500+) with even lower voltage, so i'm now testing it with 1.3V but only tested couple hours, need overnight testing to be sure.

Now, comparing my 2800+ to the 2500+ that some of you guys have, i think my chip is not a lot better than them in terms of quality. I originally bought it because i thought it could run higher speeds with same voltage than a lower-rated barton, but it seems to be that there is not much of a difference.

einolu · Post by **einolu** » Wed Feb 18, 2004 8:07 am

I think that all bartons/tbbs should be run at 200 fsb to get max preformance, mine is running at 200x10 (2400xp) at stock voltage (i have an asus, can undervolt...)

~EO

lm · Post by lm » Wed Feb 18, 2004 9:22 am

einolu wrote:I think that all bartons/tbbs should be run at 200 fsb to get max preformance, mine is running at 200x10 (2400xp) at stock voltage (i have an asus, can undervolt...)

~EO

Maybe you meant you can _not_ undervolt? It is possible with a simple mod but it will void the cpus warranty. In fact i have done this mod (cut one of the L11 bridges)

kamina · Post by **kamina** » Wed Feb 18, 2004 10:16 am

einolu wrote:I think that all bartons/tbbs should be run at 200 fsb to get max preformance, mine is running at 200x10 (2400xp) at stock voltage (i have an asus, can undervolt...)

~EO

I agree. This person did'nt get very good quality ram though (kingston valueram 333), and did'nt want to overclock. As the multi is locked, it would have required overclocking it to xp3200+ speeds. (which it probably would have been fine with)

dukla2000 · Post by **dukla2000** » Sun Feb 22, 2004 5:06 pm

einolu wrote:I think that all bartons/tbbs should be run at 200 fsb to get max preformance, mine is running at 200x10 (2400xp) at stock voltage (i have an asus, can undervolt...)

I agree with the intention but I cant get either of my Tbred Bs to run 200fsb at reasonable VCore (my 'reasonable' is spec plus 10-20%). The big gotcha is Memtest86 test 5 - see this thread for details. I have consistent problems with 2 different mobos, 3 different sticks DDR.