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AMD Athlon 64-Bit CPUs Explained

Former staff writer    -   January 25, 2004


Side-by-side glimpse 
To give a better comparison of the processors, I've created a table based off of information provided by AMD's technical website. For reference, I've added some information regarding the Athlon XP, Pentium IV, and Pentium IV Extreme Edition (EE). Since this is primarily to compare the Athlon 64 and Athlon 64 FX, some of the information for the other processors is not available.

 
Athlon 64
Athlon 64 FX

Athlon XP

Pentium IV
Pentium IV EE
Architecture:
K8
K8
K7
--
--
Architure Introduction:
2003
2003
2001?
2000
2003
Interface:
Socket 754
Socket 940
Socket A (462)
Socket 478
Socket 478
Number of transistors:
105.9 Mil
105.9 Mil
54.3 Mil
55 Mil
169 Mil
Manufacturing technique:
0.13 Micron, SOI
0.13 Micron, SOI
0.13 Micron
0.13 Micron
0.13 Micron
CPU core's surface:
193 mm2
193 mm2
101 mm2
146 mm2
--
System bus:
HyperTransport
HyperTransport
Front Side Bus
Front Side Bus @ 800 Mhz, 533 Mhz Half-duplex
Front Side Bus @ 800 Mhz Half-duplex
32-bit instruction support:
Yes
Yes
Yes
Yes
Yes
64-bit instruction support:
Yes, AMD64 tech.
Yes, AMD64 tech.
No
No
No
Integrated memory controller:
Singlechannel 64-bit
Dualchannel 128-bit
No, device logic integrated on motherboard
No, device logic integrated on motherboard
No, device logic integrated on motherboard
Bus bandwidth:
6.4 GB/s
6.4 GB/s
--
6.4 GB/s
6.4 GB/s
Integrated north bridge:
Yes, 128-bit wide databus @ CPU clock frequency
Yes, 128-bit wide databus @ CPU clock frequency
No
No
NO
Pipeline length:
12
12
10
--
--
L1 Cache Size
128 KB
128 KB
128 KB
12K µop trace + 8KB data
12K µop trace + 8KB data
L2 Cache Size
1 MB
1 MB
512 KB
512 KB
512 KB
L3 Cache Size
--
--
--
--
2MB
3D and multimedia instructions:
3DNow!, SSE, SSE2
3DNow!, SSE, SSE2
3DNow!, SSE
SSE, SSE2
SSE, SSE2

 

Conclusion
Well, that's about it. Hope this little article will be of some use to those with questions about the AMD 64 processors. I'm sure that there will still be more questions about the processors in the future, so don't forget to check out our CPU forum or our IRC Channel for the latest information and discussion on the AMD64.


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  1. Introduction & Chip Information
  2. Athlon 64 FX-xx
  3. Athlon 64 xxxx+
  4. Side-by-side Comparison & Conclusion
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