first of all i'd like to thank everybody for looking at this topic !
i'm very confused with AMD processors. My question is :
the sempron processor works on both 32bit and 64bit technology ?
the athlon 64bit processor supports only 754 socket and 939 ? is that correct ?
and the 64bit fx processor supports only 939 socket and 940 socket ? is that correct ? thanks

QUOTE the sempron processor works on both 32bit and 64bit technology ?
Nope.
ALL Sempron processors are 32-bit ONLY (even though Socket 754 Semprons are architecturally very similar to an Athlon 64).
QUOTE the athlon 64bit processor supports only 754 socket and 939 ? is that correct ?
If you're referring to the AMD Athlon 64 line of processors, that is correct
QUOTE and the 64bit fx processor supports only 939 socket and 940 socket ? is that correct ?
Yes and no...

Initially, the Athlon 64 FX series were released for Socket 940 (A64 FX-51).
The second Athlon 64 FX model to be released, the A64 FX-53, first came out on Socket 940 and was later complemented by a Socket 939 version.

With the new Athlon 64 FX-55, however, Athlon 64 processors will no longer use Socket 940 (there is only a Socket 939-version of the A64 FX-55) - ALL future Athlon 64 FX models will be Socket 939 parts.

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The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.

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<center><font color=red>MODERATOR</center></font>

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AMD Athlon 64 X2 6000+ 89W :: Asus M2N32SLI Deluxe :: 2x1024MB Muskin XP2-6400 DDR2-800 :: BeQuiet! Darkpower Pro 530W :: 2x WD Raptor 74GB/10k rpm, RAID 0 :: ATI Radeon X1950XTX

Hello, i would like you to send me a formal statement in a pdf or document form that certifies that amd semron cpu's are only 32 bit and not 64 bit

AMD Sempron Product Datasheet' ">http://www.amd.com/us-en/asset...nd_tech_docs/31805.pdf
and for comparison:
AMD Athlon 64 Product Datasheet' ">http://www.amd.com/us-en/asset...nd_tech_docs/24659.PDF

note that the following line from the AMD Athlon 64 Product Datasheet is NOT present in the Sempron's Product Datasheet:
QUOTE • AMD64 Technology
– AMD64 technology instruction set extensions
– 64-bit integer registers, 48-bit virtual addresses, 40-
bit physical addresses
– Eight new 64-bit integer registers (16 total)
– Eight new 128-bit SSE/SSE2 registers (16 total)

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The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.

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<center><font color=red>MODERATOR</center></font>

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AMD Athlon 64 X2 6000+ 89W :: Asus M2N32SLI Deluxe :: 2x1024MB Muskin XP2-6400 DDR2-800 :: BeQuiet! Darkpower Pro 530W :: 2x WD Raptor 74GB/10k rpm, RAID 0 :: ATI Radeon X1950XTX