Duel of the Titans: Opteron vs. Xeon

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All Chipsets For AMD Opteron Compared

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Manufacturer AMD AMD AMD
Processor Opteron w/Hammer Core Athlon XP w/Barton Core Athlon XP w/Thoroughbred "B" Core
Introduction April 22, 2003 March 10, 2003 Q3, 2002
Clock Frequencies 1.8 - 3.xx GHz 2.16 - 2.xx GHz 1.86 - 2.66 GHz
Process technology 0.13 µm 0.13 µm 0.13 µm
Die size 193 mm² 101 mm² 84 mm²
Number of Gates Row 5 - Cell 1 54.3 Million 37.5 Million
Platform Socket940 Socket462 Socket462
CPU Bus Clock (Front Side Bus) - 166 MHz / 333 MHz DDR 133/166 MHz / 266/333 MHz DDR
L1 Execution Cache Size 64 kB 64 kB 64 kB
Execution Pre Decode? no no no
L1 Data Cache Size 64 kB 64 kB 64 kB
Hardware Data Prefetch yes yes yes
L1 Cache Clock core clock core clock core clock
L1 Data Cache Bus Width 64 bit 64 bit 64 bit
L2 Cache Size 1024 kB 512 kB 256 kB
L2 Cache Clock core clock core clock core clock
L2 Cache Addressable Range 64 GB 64 GB 64 GB
Processor Data Bus Width 64 bit 64 bit 64 bit
Platform Support
Chipsets AMD 8131 VIA KT333 to KT400SiS 735 and SiS 745Nvidia nForce, nForce 2AMD 750 and 760 VIA KT333 to KT400SiS 735 and SiS 745Nvidia nForce, nForce 2AMD 750 and 760
Type of Memory DDR-SDRAM (Dual) DDR-SDRAM SDRAM, DDR-SDRAM
Memory Clock 166 MHz 133/166/200 MHz 100/133/166/200 MHz
Instruction Extensions
MMX yes yes yes
Enhanced 3DNow! yes yes yes
3DNow! Professional yes yes yes
SSE yes yes yes
SSE2 yes no no
Electrical Specifications
SMP-Support yes no ('not officially endorsed or supported') no ('not officially endorsed or supported')
Core Voltage 1.65 Volt 1.65 Volt 1.65 Volt
Thermal Protection (Thermal Diode) yes yes yes
Integrated Thermal Protection Logic yes no, requires logic on motherboard no, requires logic on motherboard