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Prices: CPU Intel P4 2.4C-800 P4 2.6C-800 P4 2.8C-800 P4 3.0-800 P4 3.2-800 AMD AthlonXP XP 1700+ XP 2000+ XP 2400+ XP 2500+ XP 2700+ XP 3000+ XP 3200+ Athlon64 Athlon64 3200+ Athlon64 FX-51 Opteron Opteron 240 Opteron 242 Opteron 244 Opteron 246 Memory Corsair Crucial Kingston Mushkin OCZ |
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| AMD Athlon64 3200+ - ASUS K8V Deluxe The Middle Grounds | |
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(Review by MS, November 3, 2003) |
| K8V Deluxe At: |
Cachemem
The Athlon64 FX-51 has so far been the record holder for low latency memory access, despite the handicap that it was not possible to run any memory at a tRCD=2 and, moreover, the additional latency cycle on the command and address bus caused by the interposed register on the DIMM. For best illustration of what is going on, we have plotted the stride length vs. block size matrix of the Athlon64 in direct comparison to both the Athlon64 FX-51 and the Pentium4 Extreme Edition. All benchmarks were run at 2:2:2:7 (CL:tRCD:tRP:tRAS) latency settings.
Athlon64 3200+ vs Athlon64 FX-51
Athlon64: solid blocks, Athlon64 FX-51: Transparent blocks; access latencies in ns: lower is better
The highest latencies at the longest strides and largest block size was 64ns, compared to 76ns for the FX-51. At 512 Byte stride length and 2048 or 4096 kB block size (which is used elsewhere as common metric), the A64 scored access latencies at amazing 43 or 45 ns, respecively.
Athlon64 3200+ vs P4 Extreme Edition
Athlon64: solid blocks, Athlon64 FX-51: Transparent blocks; access latencies in ns: lower is better
The P4 EE has the advantage of the 2MB L3 cache which helps with lower block sizes, however, beyond 2048 kB, the access latencies to the memory are between 65% and 32% higher than those of the Athlon64.
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