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Which is the best CPU out of these two?

magick

magick

magick

Soldato
Joined
11 Apr 2004
Posts
4,413
I know someone who's selling two cpus at the same price that will fit one of my machines. Which is the best?

Athlon XP "Thoroughbred A/B" (Model 8, 130 nm)
Athlon XP 2400+ (2000 MHz) 256 KiB 266 MT/s 15x 1.65 V 68.3 W (B) August 21, 2002 AXDA2400DKV3C

Athlon XP-M "Barton" Desktop Replacement
Athlon XP-M 2400+ (1800 MHz) 512 KiB 266 MT/s 13.5x 1.60 AXMA2400FUT4C

He says the first CPU is a barton but the product number on http://en.wikipedia.org/wiki/List_of_AMD_Athlon_XP_microprocessors says it's a thoroughbred.

Not to sure which to get because the thoroughbred is 200mhz faster but has 256kb less cache. Also, I think the xp-m barton comes unlocked? And therefore might have be close to death from being oc'd? He offers a 15 day guarentee on both of them.

Thanks.
 
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My Barton didn't clock well for me, it all depends what you want to do with it really. Some things might want the extra cache.
 
Rackerz said:
My Barton didn't clock well for me, it all depends what you want to do with it really. Some things might want the extra cache.
Click to expand...

I'm using it for running cubase and music production, so would the extra 256k cache be better than an extra 200mhz? As for clocking I'm not that concerned because I want to keep the machine quiet. If I get an extra 200 mhz I'll be happy though. Does the barton have an unlocked jultiplier? The only thing that concerns me is that if it has, the barton may have already been clocked to death.
 
The Barton will be the better cpu, BUT it depends on which motherboard you will be using. If memory serves, then the -M chips default to a multi of x8, so if you have a mobo where you can't set the multi manually they will run at 133 x 8 = 1.06GHz:( So in this case the T'bred is better.

The multi on both chips are going to be unlocked, as -M are all unlocked and for the others , they were locked somewhere around week 39 of 2003. So potentially both could be OC'd, but the -M chips are more likely to have been OC'd as only the best silicon was used in them and they had the potential of greater clocks.

Hope this helps

T
 
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if i remember correctly the athlon chips really benefited from the extra cache but also loved raw fsb lol.
But as soon as you get the chip run orthos to check its stability at stock speeds to eliminate the chance of its being fubar.

***EDIT***

Done a little googling and found a few posts from way back in the day that look like this in other overclocking forums.

Unlocked Amd 2400+ (AXDA2400DKV3C from August 21, 2002)

"The problem is that I can't change the multiplier. If I change the multiplier from 15x (standart) to for example 13x, the system won't boot. Than I have to put a jumper at the 100mhz fsb setting, then I must change the multiplier back to by h/w & save the settings. So I am only able to change the fsb, but not the multiplier"

the multi can be unlocked with the wire trick though wich is a pllus
 
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My Barton 2400-M was multi unlocked and ran at less volts, it also overclocked very well. In fact, I still have it in a box.
 
Edleake said:
My Barton 2400-M was multi unlocked and ran at less volts, it also overclocked very well. In fact, I still have it in a box.
Click to expand...
Q.F.T. tbh...

'M' means mobile, ie, they were desigened for laptops (but still used the same form factor, so it will work...) and thus, had a lower stock voltage, unlocked multi, and cooler running, all of which help make it a better clocker.

The t'breds were a bit toasty too iirc, but a lot of them also had unlocked multi's (i forget when they stopped unlocking them, sorry :()
 
The motherboard is an Asus A7V266-E and it does let you manualy select the multiplier. Thing is the multipliers go like this :-

5.0x/14.0x (single setting)

then 5.5x to 12.0x in 0.5 increments

12.5x/13.0x (single setting)

How on the manual setting can you switch between 5.0x and 14.0x or 12.5x and 13.0x? Would the MB automaticaly choose the highest?

And I've found a new processer that's straight out of a laptop :-

Athlon XP-M "Barton" (Mainstream, 45-53 W TDP, Socket A)
Athlon XP-M 2400+ (1800 MHz) 512 KiB 266 MT/s 13.5x 1.45v AXMH2400FQQ4C

It's multiplier is 13.5 which isn't on my motherboard so it be best at the 12.5x/13.0x multiplier for stability?

And it's voltage is 1.45v and my MB lowest setting is 1.70v so would it be safe to have a 1.45v CPU at 1.70v?
 
I used to run mine 12.5x with a 200MHz FSB (2.5GHz), by default the 'M' expects to see 333MHz but it can quite happily run at 400, or at least it's built to!

1.7v sounds very high, you sure that's your LOWEST? :-o

To be honest I used to run mine at 1.55v and it was warm enough... with 1.7v you might crack 3GHz with that chip! lol :D
 
Post script: I would consider 1.7v the upper limits of safe with GOOD case and CPU cooling. At those volts you'll be reducing the cpu's life expectancy, perhaps even by a half... but will you be requiring to run it in 10 years time? Doubtful, so crack on. ;)

You will definately have to run it at higher clocks to maintain that voltage, running it slower at too high volts which make it more unstable - high volts actually make stock and under clocking less stable then overclocking (in my experience).
 
Edleake said:
I used to run mine 12.5x with a 200MHz FSB (2.5GHz), by default the 'M' expects to see 333MHz but it can quite happily run at 400, or at least it's built to!

1.7v sounds very high, you sure that's your LOWEST? :-o

To be honest I used to run mine at 1.55v and it was warm enough... with 1.7v you might crack 3GHz with that chip! lol :D
Click to expand...

That's the lowest setting my mb has. Highest is 1.8 I think. Is it possible with a later athlon XP chip inside it will give options to run it lower, maybe it just says 1.7v because the xp1600 palomino I have in at the mintue needs 1.7v? Also FSB oc'ing isn't really an option because my mb is the older 266fsb.

Heres a pic from the bios :-
cpu_bios_settings.PNG


Many people run them higher than 1.7v. In the thread the pic is from the guy recommends setting the vcore to 1.65 but I'm running the same bios and have the same board rev and there's no 1.65 in the options.

http://www.a7vtroubleshooting.com/f...oard=a7v;action=display;num=1173734891;start=
 
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