Dang mobo doesn't support low voltages...What Socket A CPU overclocks the best?

KDOG

Diamond Member
Oct 9, 1999
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Drats. Was looking at getting one of those mobile Athlon 2500+s' and see if I could hit 2.7 or 2.8 with it, but no dice - mobo won't do it. I have a regular 2500+ doing 2.2Ghz stable right now, but its multiplier locked so I'm stuck with it. Is there any other regular Socket A proc that will give me an overclock worth upgrading or am I good where I'm at?
 

coolred

Diamond Member
Nov 12, 2001
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What are you complaining abotu low voltages for if your trying to overclock, generally you would want to increase voltage to make the chip run mor estable at high clocks. Am I reaidng this wrong or something?
 

KDOG

Diamond Member
Oct 9, 1999
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Those MOBILE athlons have to run on lower voltages 1.3, 1.4....
 

coolred

Diamond Member
Nov 12, 2001
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I think the voltages are actually 1.35 for the 35watter and 1.45 for the 45 watters, but that is what they run at at stock speed, you plan to overclock them, so you will need to increase the voltage too them. The only problem I could see with this, is if it won't even boot at first since it is sending too much voltage to the CPU, but I wouldn't think this would matter.
 

KDOG

Diamond Member
Oct 9, 1999
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dang, I would kinda hafta know before dropping the $$$ on the chip
 

coolred

Diamond Member
Nov 12, 2001
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Well after a quick search of the forums, I found this link.

I didn't read much of it, but he appears to be usingt he same motherboard and a 45watt mobile which runs stock at 1.45 I think, so if it works for him, should work for you. But it may be running at 1.6 or whatever you said the min. voltage of the board was, thus making it run hotter then 45watts.
 

Jeff7181

Lifer
Aug 21, 2002
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Woah... you haven't done ANY reading here about this have you? Ok... some facts...

- Mobile AthlonXP DON'T HAVE to run on lower voltage, they run just fine on 1.65 which is the default for regular Athlon XP's.
- You're not going to hit 2.7 or 2.8 GHz with ANY Athlon XP without some serious water cooling or phase change cooling.

Your A7N8X Deluxe will be just fine. That's what I'm using. The lowest voltage it supports is 1.55 volts I believe, which is no problem. When you boot the first time it will be detected as a Mobile Athlon XP at 800 MHz. That's fine... Here's a little guide I put together to help beginners start overclocking without destroying anything.
 

WobbleWobble

Diamond Member
Jun 29, 2001
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Jeff7181 is correct.

You don't have to run the the mobile AthlonXP at a lower voltage. In fact, if you're overclocking you'll be up in the 1.6-1.9V area anyways.

2.7 - 2.8GHz is wishful thinking, especially on air.

FYI, I'm running my mobile XP2500+ at 2.4GHz on my A7N8X Deluxe Rev 2.0 at 1.7V. I know I can go higher but my fans are all throttled down to 5-7V so that you can't even hear my system a metre away.
 

coolred

Diamond Member
Nov 12, 2001
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While 2.7 or 2.8 might be out of the question people have been able to hit 2.5-2.5 with air cooling on the mobiles.
 

Jeff7181

Lifer
Aug 21, 2002
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Originally posted by: KDOG
Hmmm, thats good news... I may have to pick one of those up!!!

From what I hear, the Mobile 2400's are just as good as the 2500's or 2600's... so save a few bucks and get one of those for less than $80.
 

trexpesto

Golden Member
Jun 3, 2004
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check out the 35 watt ones, I just got one - supposedly a good stepping.
89.00 at newegg

just ordered one last night. I have seem posted that the better silicon gets used in the 2600+'s - sounds specious to say the least... If specious means what I think.

I went for the 35 watt 2400 to keep it cool and quiet. I'd be very happy to run it at 12*200fsb and get some good memory.

By the way I have NO IDEA what I am doing - this is my first build. Good Luck!
 

KDOG

Diamond Member
Oct 9, 1999
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Man, payday can't come fast enough. If I can hit 2.5 stable I'd be very happy. 2.6 and I'd be doing cartwheels!!! WooHoo!
 

Jeff7181

Lifer
Aug 21, 2002
18,368
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Originally posted by: KDOG
Man, payday can't come fast enough. If I can hit 2.5 stable I'd be very happy. 2.6 and I'd be doing cartwheels!!! WooHoo!

Don't expect 2.5... you'll most likely be disappointed. Very few get to 2.5 and remain stable. If you do, you'll need some SERIOUS air cooling, or water cooling to go beyond 2.5.
 

KDOG

Diamond Member
Oct 9, 1999
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hopefully I get the right stepping that will allow me to do that, though. I heard its the "I" stepping that is pretty good.
 

AWhackWhiteBoy

Golden Member
Mar 3, 2004
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Originally posted by: Jeff7181
Originally posted by: KDOG
Man, payday can't come fast enough. If I can hit 2.5 stable I'd be very happy. 2.6 and I'd be doing cartwheels!!! WooHoo!

Don't expect 2.5... you'll most likely be disappointed. Very few get to 2.5 and remain stable. If you do, you'll need some SERIOUS air cooling, or water cooling to go beyond 2.5.

i bought a volcano 12 off a friend for $15, it handles 2.6ghz but not much more. 43C or so max with 1.8volts. i can't hit 2.7 with it.
 

Jeff7181

Lifer
Aug 21, 2002
18,368
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Originally posted by: AWhackWhiteBoy
Originally posted by: Jeff7181
Originally posted by: KDOG
Man, payday can't come fast enough. If I can hit 2.5 stable I'd be very happy. 2.6 and I'd be doing cartwheels!!! WooHoo!

Don't expect 2.5... you'll most likely be disappointed. Very few get to 2.5 and remain stable. If you do, you'll need some SERIOUS air cooling, or water cooling to go beyond 2.5.

i bought a volcano 12 off a friend for $15, it handles 2.6ghz but not much more. 43C or so max with 1.8volts. i can't hit 2.7 with it.

I don't think your temp is being reported accurately, but whatever. All I'm saying is don't expect 2.5 or 2.6 because the majority of them don't get that high.
 

Jeff7181

Lifer
Aug 21, 2002
18,368
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Originally posted by: AWhackWhiteBoy
it looks like a lot of the new mobiles don't even hit 2.4 easily anymore :\

i think hes dreaming

I think the main reason for that is crappy motherboards that can't handle more than a 200 MHz FSB... or PC3200 RAM that doesn't overclock well so people condemn the CPU or motherboard simply because their RAM passed memtest86. I don't put much value in memtest86 because that's ALL it's testing... there's no extreme load being put on the CPU or video card or power supply that could cause voltage fluctuations. To test for complete system stability, you have to test the complete system as a whole... not each individual component separately.

A lot of people don't understand, or just don't consider everything that's happening when they overclock. Such as temperatures increasing and how that reduces the conductivity of materials... or what happens when EVERY component is using the most power you'll ever see it using. This lack of "awareness" leads people to say things like "my mobo doesn't support low voltages so I can't use a Mobile processor," or "my Mobile XP2500 is a dud, I can't get it past 2.2 GHz even at 1.8 volts." (no offense to the OP, everyone has to learn these things sometime or another)
 

Jeff7181

Lifer
Aug 21, 2002
18,368
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81
Originally posted by: AWhackWhiteBoy
i concur, to sum up what you said in a less polite manner:

lots of people are building PCs that shouldn't :)

LMAO


*EDIT* I bet Dell could get away with offering an "assemble it yourself" kit at no discount... they just ship you the parts and you assemble it. Saves them some assembly time, and makes people feel like they're building their own computer :)
 

AWhackWhiteBoy

Golden Member
Mar 3, 2004
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i heard awhile back Dell was going to impliment a "do it yourself" repair policy. they send you the parts and you fix it yourself, that way they save overhead. i'm not sure whatever happened to that idea.
 

jagec

Lifer
Apr 30, 2004
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Originally posted by: Jeff7181
Originally posted by: AWhackWhiteBoy
it looks like a lot of the new mobiles don't even hit 2.4 easily anymore :\

i think hes dreaming

I think the main reason for that is crappy motherboards that can't handle more than a 200 MHz FSB... or PC3200 RAM that doesn't overclock well so people condemn the CPU or motherboard simply because their RAM passed memtest86. I don't put much value in memtest86 because that's ALL it's testing... there's no extreme load being put on the CPU or video card or power supply that could cause voltage fluctuations. To test for complete system stability, you have to test the complete system as a whole... not each individual component separately.

Doesn't matter; the mobiles are multiplier unlocked so you can get them up to 2.4GHz @ 133 FSB if you like. It's all CPU limited with mobiles, when your RAM starts to crap out you can just lower the FSB and increase the mult.