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How high can I overclock an XP 2500+ 'Barton'?

most hit 2200 without a hitch

expect at least 2100 but not more than 2200

if it's a good chip around 2300
 
Most recommend 1.75v or lower..........some say as high as 1.8. 🙂 I probably wouldn't go over 1.75 unless it was ABSOLUTELY necessary. I've gathered that at a certain voltage point that you can't overclock any higher and it just makes extra heat.......this info was of course mentioned here on AT. I don't have a 2500+ myself but from looking at all of the oc'ing threads on here.....the 1.75-1.80 seems to be the general concensus. 🙂

jc

 
I'd say 1.8V actual voltage is the highest I'd run it if you want to keep your CPU for more than 1-2 years.

I say actual voltage as some motherboards give more or less voltage than what you specify in the BIOS.
 
With the stock heatsink, make sure that you watch the CPU temperature so that it doesn't go above 60C. Anything higher and then heat may start causing issues.
 
Raising voltage will be tough with stock cooling. I'd use as much voltage as you can keep cool enough to run prime95.
With an slk-800 and a duct I was able to run 1.9V.
 
my 2500+ plus is stable at 3200+ speed (prime95 8+ hours), using stock cooling the cpu socket diode temp under load is 57C. the thermalright slk900a seems to be one of the best fits for OCing the 2500+, although the slk800a is popular too.
 
Doing a search for that cooler, I went here:
Thermalright SLK900A - KDC Computers
First of all, it looks as though you better have some serious space in your PC to mount that thing!!! lol
Second, is it typical for it not to come with a fan? If it doesn't, it would appear that such a heat sink would require a special kind of fan...
Although, looking at the install tips, its questionable if that monster would fit into my case!! Any recomendations for smaller heatsinks?
 
Ok. I'm pretty new to the whole "Overclocking" scene, but I can share some insight as to what I have learned in the past few months of MANY trials, and errors with my 2500+ Barton overclock on my nForce2 board. When most people say that they are Prime95 stable at a certain voltage...it seems that they run it for 8-10 hours, and then stop. I suggest running the "Stress test" for 48-72 hours. I've gotten many errors from the 24-48 hour mark. I also run my 2500+ at 1.9v, but that's only because my board and/or my PSU is not putting out a nice consistent 1.9v at this setting, but more like 1.8-1.9 range. I don't know which is the culprit, but I know that dipping below the 1.75 range will reboot my computer when it's running at the current 3200+ speeds (2205mhz)...and the temperatures are still good. I HEAVILY modded my case, which had piss poor ventilation, to include 2x120mm fans, and 2x92mm fans as well as a 92mm fan blowing onto a slk-900a. I get 38degrees idle, and 49-51degrees at full load. I'm not really worried now about these temperatures, and am not worried that I use such a high voltage...because according to AMD, these processors can handle 2.2 volts or something in that range.
 
First off, I apologize as I can't seem to insert a quote (I thought it would be easy....must be doing something wrong).

govtcheez75....what causes this dip in voltage you are seeing? Is this a problem with the power supply or is the voltage changing due to processor temperture fluctuations?

Besides, what good does bumping up the CPU voltage do? I'm asking because I honestly don't know, not trying to be a smart-ass!!

From reading the forums, it sounds as though the Athlon Barton sweet spot is between 1.6 and 1.8V. Although, it sounds like as you overclock your processor, higher voltages are needed. Is that true in both cases for FSB or multiplier adjustments?

Okay, so that's four questions in one post....not very good etiquette, but all of them are legit questions!
Thanks, guys.

 
Cheez's fluctuations are likely due to the power supply unit (PSU). Some generic PSU's fluctuate alot, and it's recommended to get a high quality PSU like Antec, Sparkle, or Enermax if you are serious about overclocking.

Bumping the CPU voltage may make an unstable CPU completely stable when overclocking. Some people get unlucky and get a chip that can run overclocked at the default voltage. Myself, I've had about 5-6 CPU's dating back to the Celeron3 366@550mhz days and EVERY single one required a voltage bump for stability.

Keep in mind though, that bumping the voltage will raising the CPU temperature as a result of the increased voltage. That's why you see everyone with a $30-40 heatsink and fan, and not the stock AMD HSF. As a rule of thumb, you don't want to raise the voltage more than 0.2v over the default, unless you go with a watercooling setup.
 
Watch the heat also. Heat kills harddisk. If your case is warm and hdd is hot, most probably you need to RMA your 2 hdd like I do.
 
Seems like the importance of the Heat Sink can't be stressed enough!

About a month ago I bought an Antec PSU (400 Watts I think) because of all the crap that I have in and plugged into my PC - fearing that my cheesy 350W PSU that came with the el cheapo case I have was going to start having or causing problems. Guess I got lucky on the name brand, eh?

Thanks for the insight on the voltages, but I still don't understand how increasing the voltage makes an overclocked system more stable....
 
Originally posted by: UptheMiddle

Thanks for the insight on the voltages, but I still don't understand how increasing the voltage makes an overclocked system more stable....
Click to expand...
I'm no expert at this, but I believe that increasing the voltage makes the signals inside the CPU stronger, allowing higher frequencies at more stable levels.
 
Originally posted by: tinyabs
Watch the heat also. Heat kills harddisk. If your case is warm and hdd is hot, most probably you need to RMA your 2 hdd like I do.
Click to expand...

Processor heat ain't a problem for your hard drives if you have some decent ventilation going on in your system. My Chieftec Matrix case has a nice 80mm fan sitting in the front of the hard drive cage that blows nice cool air from the outside of the case across my WD 120SE. The heat coming out of my HSF blower mostly gets sucked out of the case by the two 80mm exhaust fans right behind it, and if anything the a bit of the heat from the hard drive is getting sucked across the heat sink as the air makes its way from the front to the back of my case. If your case is set up right, the extra heat from your OC shouldn't hurt anything else in your case.

Of couse just to be sure you could go for this baby with 12 fans, six of which are blowing across your hard drive mounting areas. This baby could keep a four disk RAID array of Raptors chilly. I'm still not sure how the two fans on the front bezel don't screw up airflow of the four mounted right behind them on the inside front of the case.

The 2500+ is ridiculously easy to OC. It takes some skill and good hardware to push it to the edge, but it isn't too hard to get a decent little speed bump for free. Mine runs fine at 3200+ speeds just by raising the FSB from 166 to 200. I left my vcore at 1.68 and so my processor temp only went up a few degrees C. Idle, it hangs around 36C and under full load from Prime95 only gets up around 42C, using an Aero 7 Lite that is only cranked halfway up to the 2300 RPM - it'd be cooler still if I let the blower go at full speed. Once I get some decent PC3200 RAM, I'll try to push it higher (I'm still running the RAM at 166 MHz for the moment). Right now I'm happy I've been able to get a 200MHz FSB out of my older rev 1.04 A7N8X-DX. Much better experience than my old Palomino 2000+ which wouldn't OC one single MHz on the same board.
 
well it depends. chieftec/antec cases are some of the best ventilated out there. there are many generic junk cases that aren't anywhere near, and processor hear definetly affects case temps on those. bunched up hd's with optical drives etc and u got a heat problem.
 
Thats good to hear batmanuel - My XP2500 should be arriving tomorrow 😀

I to have a poxy 2000+ Palomino

Can wait for that extra power.
 
0roo0roo, that link you gave contains a boatload of info! Although a great deal of it is beyond me 😕, I did learn quit a bit reading through it. In short, it sounds like the higher voltage is necessary to run the clock faster (as one overclocks their system). This in turn generates more heat on the CPU die......

Well, seems like there's lots to learn here!
 
Need a little help. My asus a7v266 volt is at 1.9. when I change it in the bios it only allows down to 1.8 and when i do 1.8 it reads 1.85. Any suggestions? I want to get down in the 1.7 range with no overclocking.
 
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