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Topic Title: Sempron = T-bred or Thoron ?
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Created On: 09/07/2004 06:26 AM
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 09/07/2004 06:26 AM
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OpenTitan
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There are two versions of Sempron:
1. Thorton core: 2200+(1500MHz) & 2800+(2000MHz) only
2. Thoroughbred core: all from 2200+ to 2800+
Am i right?

How should i understand which one do i see in the price-list?

Please, tell me about the differences of Thoroughbred, Thorton and Barton cores.
I'd like to buy the cheapest processor on the latest core. Am i right?
 09/07/2004 07:45 AM
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eddaweaver
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no, all Socket A Semprons are Thoroughbreds (or Thortons?, but the two are functionally identical).

There is also a Socket 754 Sempron, which is an AMD64 with 64-bit disabled.

The Thoroughbred has 256kb of L2 cache and runs on 133MHz front side bus (except a few very rare 2600+ chips). The only difference between Thoroughbreds and Semprons is that Semprons run on 166MHz FSB.

The Barton has 512kb of L2 cache and runs on 166MHz front side bus, except some versions of the 3000+ & 3200+ which are for 200MHz FSB.

The Thorton is a Barton with half its L2 cache disabled and set for 133MHz FSB, it is functionally identical to the Thoroughbred.

Probably the best chip for your would be a Barton 2500+ or 2600+.
Some people set the front side bus to 200MHz which runs them at 3200+ / 3400+ speeds, but be aware this will invalidate the warrenty.
 09/07/2004 08:00 AM
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OpenTitan
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Thanx!
But look at these articles:
http://www.eetimes.com/article...leAr...sub_taxonomyID=' ">http://www.eetimes.com/article...i/news&sub_taxonomyID=
http://www.overclockers.ru/new...em.s...1&id=1091264513' ">http://www.overclockers.ru/new...tegory=1&id=1091264513
http://www.overclockers.ru/new...em.s...1&id=1091181101' ">http://www.overclockers.ru/new...tegory=1&id=1091181101
The last two articles are in russian, but i think you'll get the idea.

So:
1. Sempron Thoroughbred = Sempron Thorton
2. Sempron = Athlon XP Barton - half cache = Athlon XP 166MHz FSB 256Kb cache
Is that right?

I'm thinking of Barton 2500+, but do i really need 512Kb cache? What for? Why not 256Kb?
I need to play movies and mp3, design presentations and small web-sites, play simple games, browse internet. That's all.

And, why do they say 333 MHz FSB (not 166 MHz) - who is right?
 09/07/2004 09:23 AM
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Silk_the_Absent1
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QUOTE (OpenTitan @ Sep 7 2004, 06:00 AM) And, why do they say 333 MHz FSB (not 166 MHz) - who is right?
The *actual* FSB is 166 Mhz, but because it is DDR (Dual Data Rate) it is capable of sending/recieving 2 packets of data per clock cyle, doubling it's effective speed. So the *effective* speed is 333 Mhz.

-Adam
 09/07/2004 12:16 PM
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zir_blazer
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If you hear that a Athlon XP (Barton) have 166 MHz FSB or 333 MHz Bus, is the same. All the K7 Processors have a Double Pumped Bus, doubling the effective Bus. You can clarify something about diferent K7 Processors Models with this nice Roadmap http://www.c627627.com/AMD/AthlonXP/' ">http://www.c627627.com/AMD/AthlonXP/

Thoroughbred B is a update to the Thoroughbred A desing, they have the same performance at the same Frecuency but the Thoroughbred B is cooler and can overclock more. If you see a picture of the desing of a Thoroughbred B and Barton Core, you will see that they are mostly the same but the Barton Core has more Cache Lv 2 at the bottom (512 KB Cache Lv 2, the others two 256 KB Cache Lv 2). Disable the extra Cache Lv 2 and you get a Thorton, that because both the Barton and Thoroughbred B desing is practicaly the same, its performs equal to the Thoroughbred B. Finaly, you can find Durons Applebreads, that are Thoroughbred B with 192 KB Cache Lv 2 disabled (Left only with 64 KB). I hope that this clarify you all
 09/07/2004 12:20 PM
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Silk_the_Absent1
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Truth be told the T-Bred core's and the Barton cores are the same core, just that the Barton has an extra 256K tacked on to the end, other then that they are the same thing architecturally.
 09/07/2004 01:46 PM
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Greyhound
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QUOTE There are two versions of Sempron:
1. Thorton core: 2200+(1500MHz) & 2800+(2000MHz) only
2. Thoroughbred core: all from 2200+ to 2800+
Am i right?
Yes, this is correct as far as Socket A Semprons are concerned.

There is also a Socket 754 Sempron(Sempron 3100+) which is currently based on the Newcastle-core(Athlon 64, model C) with 64-bit capability and half of its L2-cache disabled (leaving 256KB of functional L2-cache).
QUOTE How should i understand which one do i see in the price-list?
There is no difference in pricing, specifications and performance for the Thoroughbred and Thorton versions.

Apart from visual differences, i.e. the larger, 'Barton-sized' die(CPU-core) of the Thorton, you can distinguish these parts by their OPN(Ordering Part Number):

A Thoroughbred-parts' (Sempron model 8) OPN starts with 'SDA...' while a Thorton-parts' (Sempron model 10 with 256K L2-cache) OPN starts with 'SDC'.
QUOTE Please, tell me about the differences of Thoroughbred, Thorton and Barton cores.
The 'Thoroughbred'-core is the Sempron(or Athlon XP) Model 8 with 256KB of L2-cache.

The 'Barton'-core is the Athlon XP Model 10 with 512KB of L2-cache - like the other guys pointed out, it's architecturally the same thing as the Thoroughbred except for the larger L2-cache which of course also increases this cores' physical size and transistor-count.

The 'Thorton'-core is the Sempron(or Athlon XP) Model 10 with 256K L2-cache - it is a Barton-core(same physical size/transistor count) with half of its L2-cache disabled, leaving 256KB of functional L2-cache.
A Thorton has exactly the same specifications and performance as its Thoroughbred-counterpart with the exception of the physical die-size which makes it run slightly cooler on average...it does have the same maximum power-dissipation, tho.

If you're upgrading from a slower/older Athlon XP, a (Socket A) Sempron only makes sense if your budget is limited.

Semprons are targeted primarily at intels' Celeron D processors - their Quantispeed-ratings/model numbers are NOT meant to be comparable to those of the Athlon XP-line.
Consequently, an Athlon XP will usually perform better than a Sempron with the same model number.

If you're upgrading your processor on a Socket A motherboard that supports a 166MHz or 200MHz Frontside Bus(or 333/400MHz effectively if you prefer), a higher-end Athlon XP(e.g. an AXP 2800+) will usually be a better choice than a Sempron.

If you have to buy a new motherboard anyways, i would recommend to go with a Socket 754 motherboard and Sempron 3100+ or Athlon 64 2800+ if possible(usually there's not that much of a difference in price between these two parts).

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