AMD Athlon 64 System Setup:

ASUS A8N-SLI Deluxe motherboard (NVIDIA nForce4 SLI chipset); BFGTech GeForce 7800 GT OC video card (operating at 425/1050MHz); 2x512MB Corsair XMS-3200XL Pro memory (running at 400MHz DDR 2.0-2-2-10); Maxtor DiamondMax 10 250GB SATA hard drive; LG 16x DVD-ROM drive, OCZ PowerStream 520W PSU; Windows XP Professional Service Pack 2; NVIDIA nForce 4 standalone platform drivers version 6.70 WHQL; NVIDIA Forceware 78.03 WHQL.

Processors:

• AMD Athlon 64 FX-60 - 2.6GHz, 1GHz HTT, 2x1MB L2 cache;
  
• AMD Athlon 64 X2 4800+ - 2.4GHz, 1GHz HTT, 2x1MB L2 cache;
  
• AMD Athlon 64 X2 4400+ - 2.2GHz, 1GHz HTT, 2x1MB L2 cache;
  
• AMD Athlon 64 FX-57 - 2.8GHz, 1GHz HTT, 1MB L2 cache;
  
• AMD Athlon 64 FX-55 - 2.6GHz, 1GHz HTT, 1MB L2 cache;
  
• AMD Athlon 64 4000+ - 2.4GHz, 1GHz HTT, 1MB L2 cache;
  
• AMD Athlon 64 3700+ - 2.2GHz, 1GHz HTT, 1MB L2 cache.

Intel Pentium Extreme Edition System Setup:

Intel Desktop Board D975XBX (Intel i975X/ICH7R chipset); BFGTech GeForce 7800 GT OC video card (operating at 425/1050MHz); 2x512MB Corsair XMS2-5400UL DDR2 memory (running at 667MHz DDR 4.0-2-2-8); Maxtor DiamondMax 10 250GB SATA Hard Disk Drive; LG 16x DVD-ROM drive; OCZ PowerStream 520W PSU; Windows XP Professional Service Pack 2; Intel Inf 7.22 platform drivers; NVIDIA ForceWare 78.03 WHQL.

Processors:

• Pentium Extreme Edition 955 - 3.46GHz, 1066MHz FSB, 2x2MB L2 cache, Hyper-Threading Technology Enabled;
  
• Pentium 4 Extreme Edition 3.73GHz - 3.73GHz, 1066MHz FSB, 2MB L2 cache, Hyper-Threading Technology Enabled.

Intel Pentium D System Setup:

Intel Desktop Board D975XBX (Intel i975X/ICH7R chipset); BFGTech GeForce 7800 GT OC video card (operating at 425/1050MHz); 2x512MB Corsair XMS2-5400UL DDR2 memory (running at 533MHz DDR 3.0-2-2-8); Maxtor DiamondMax 10 250GB SATA Hard Disk Drive; LG 16x DVD-ROM drive; OCZ PowerStream 520W PSU; Windows XP Professional Service Pack 2; Intel Inf 7.22 platform drivers; NVIDIA ForceWare 78.03 WHQL.

Processors

• Pentium D 950 - 3.4GHz, 800MHz FSB, 2x2MB L2 cache;
  
• Pentium D 940 - 3.2GHz, 800MHz FSB, 2x2MB L2 cache;
  
• Pentium D 930 - 3.0GHz, 800MHz FSB, 2x2MB L2 cache.

We have used our Pentium Extreme Edition 955 processor with its unlocked multiplier to represent these three Pentium D 900-series CPUs. The Pentium D 900-series features the same Intel Presler core using an 800MHz FSB and Hyper-Threading Technology is disabled.

Unbuffered Memory Bandwidth:

Unbuffered memory was dominated by Intel, but due to AMD's on-die memory controller, the latency is greatly reduced. Thus, the instantly usable bandwidth is less than what we're seeing here.