Barton 2500 @ 1.1v?
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Barton 2500 @ 1.1v?
I think I remember someone saying that the bartons are all (multiplier) unlocked. Can anyone confirm this? If so, I would like to get one and try and get it running at 1.1v. How much would I have to underclock it to get it running at that voltage? Has anyone tried this?
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why would you be wanting it to run at 1.1V and not something else?
I run it at 1.425V and I currently have 24 case, 28 cpu, in idle...
When stressed the cpu is 37 (Prime95) and 28-30 casetemps.
I know I'm using a coolermaster casefan to cool the cpu running at 12V but I'm sure I can use the fan at 7V....
I run it at 1.425V and I currently have 24 case, 28 cpu, in idle...
When stressed the cpu is 37 (Prime95) and 28-30 casetemps.
I know I'm using a coolermaster casefan to cool the cpu running at 12V but I'm sure I can use the fan at 7V....
Well i think you meant unlocked.. but thanks. Ill find out which ones are unlocked and keep an eye out for one.TheScarf wrote:deinitely NOT all overclocked
@Genghis
Im just aiming for a dead silent pc. I tried it with a 5V L1A on CPU and for exhaust and temps went up to 60degC in no time (MCX462+). At 12V I can hear more than just airflow. Hopefully get the same performance as my 2200 right now, just running a whole lot cooler.
Im going to foam the inside and build a custom PC stand/muffler setup (prototype looks sweet!) Should get some really good results.
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Bartons was unlocked up to 2003 week 39. After that I think they are all locked. It is however possible to unlock them by modifying the bridges. There are good detailed manuals for this with great pictures.
I have been running my Barton 2500+ at 1.1 volt when undervolted.
I have not really pushed hard to find the limit of how high speed you can go with 1.1V, but at least 1.0GHz seems fine.
I have done some tests with 1.1V at 1260MHz (7*180) and that seems to be ok.
1.1V seems to be close to the limit on what the CPU likes, so it can be pushed quite a bit further on 1.125V.
I will go compleatly fanless, so this is the main reason that I want to push the Vcore really low.
You can run stock speed 1826MHz at around 1.425V.
Dropping slightly in speed you will be able to drop voltage to ~1.3V very quickly.
I have been running my Barton 2500+ at 1.1 volt when undervolted.
I have not really pushed hard to find the limit of how high speed you can go with 1.1V, but at least 1.0GHz seems fine.
I have done some tests with 1.1V at 1260MHz (7*180) and that seems to be ok.
1.1V seems to be close to the limit on what the CPU likes, so it can be pushed quite a bit further on 1.125V.
I will go compleatly fanless, so this is the main reason that I want to push the Vcore really low.
You can run stock speed 1826MHz at around 1.425V.
Dropping slightly in speed you will be able to drop voltage to ~1.3V very quickly.
Heck, I'm able to get my Barton 2500 to 1.3V *at* stock speed - temps are 40/47, case is ~25, using a modded Silent Boost with an L1A at ~6V (fanmate)! Mind you, I do have two L1A case fans at 6V that are blowing cool air onto the HS.silvervarg wrote: Dropping slightly in speed you will be able to drop voltage to ~1.3V very quickly.
Also, (and I haven't tried this), but does anyone know how good the temps get if you simply lower the FSB but keep the multiplier at 11x (for those of us with locked Bartons?) It could be an effective trick to get to the fanless range - 11X100 = 1.1Ghz, not bad... (or 11X66 = 726MHz, not great, but plenty for internet, office, winamp, etc).
Sameer
I use the SOLTEK FRN2 board - it's the best budget board I have ever owned. Sells for about $100. Can be gotten from NCIX. Undervolts to 1.1, huge clock range, auto-CPU shutoff above a certain temp, ability to read CPU diode, nForce 2 U400, blah blah blah. Easily worked when I OC'd the barton 2500 to 3200. About the only thing it can't do that I want is onboard fan control through software (i.e using Speedfan).marc999 wrote:What motherboards are you guys using to undervold your Bartons?
I looked into undervolting mine, but my ASUS A7N8X-X (NForce 2 chipset) won't let me.
I wonder if I write ASUS if they'll add it in their next BIOS release?!
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Do you pass at least 1 hour of prime95 torture test on 1.3V stock speed without errors?Heck, I'm able to get my Barton 2500 to 1.3V *at* stock speed - temps are 40/47, case is ~25, using a modded Silent Boost with an L1A at ~6V (fanmate)! Mind you, I do have two L1A case fans at 6V that are blowing cool air onto the HS.
I don't think I have tried that setting on my Barton 2500, but I don't think it will pass without errors.
You get the most benefit of lowered heat when lowering the Vcore. Assuming you run with a constant Vcore your heat will be directly proportional to the MHz you are running. So it is really multiplier*FSB that matters. That means that lowering the FSB will help quite a lot in reducing the heat.Also, (and I haven't tried this), but does anyone know how good the temps get if you simply lower the FSB but keep the multiplier at 11x (for those of us with locked Bartons?) It could be an effective trick to get to the fanless range - 11X100 = 1.1Ghz, not bad... (or 11X66 = 726MHz, not great, but plenty for internet, office, winamp, etc).
I have noticed some instability when going real low in FSB at some settings, but this might have to do with my memory timings or similar things.
I have no problem running in the 1.0GHz range with the CPU fan turned off (stock DP-102 cooler) and running prime95 forever.
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Doh!! Maybe I should have got that MOBO? Oh well, too late now.My ECS K7S5A doesnt undervolt either but I plan on getting the Abit NF7-S
I tried running my 2500+ at 11 x 100FSB fanless with a Zalman 7000A (yes, my chip is locked). It got to 63 degrees after about 13 minutes of Prime95, so I stopped the test. Then again, I recently found out that the store mounted in with only Arctic Silver 3, and like I mentioned, I was not able to undervolt. I do have good case ventilation though (SLK-3700 clone with a 5V 120mm Papst at the back, and just some lame ass ATI Xpert 2000 video card).Also, (and I haven't tried this), but does anyone know how good the temps get if you simply lower the FSB but keep the multiplier at 11x (for those of us with locked Bartons?) It could be an effective trick to get to the fanless range - 11X100 = 1.1Ghz, not bad... (or 11X66 = 726MHz, not great, but plenty for internet, office, winamp, etc).