PCMark05 Professional measures the system performance by running several tests. We selected two batches for our comparisons, System and CPU.

The System batch performs the following tests: HDD XP Startup, Physics and 3D, 2D Transparent Window, 3D Pixel Shader, Web Page Rendering, File Decryption, 2D Graphics Memory – 64 lines, HDD General Usage and three multithreading tests.

The CPU batch performs the following tests: File Compression, File Decompression, File Encryption, File Decryption, Image Decompression, Audio Compression and two multithreading tests.

The results are given in a PCMark05 specific unit.

PCMark05 Professional 1.2.0 - System Batch	Score	Difference
Core 2 Extreme "QX6950" (3.33 GHz)	9394	5.13%
Core 2 Extreme QX6850 (3 GHz)	8936
Core 2 Extreme QX6700 (2.66 GHz)	8308	7.56%
Core 2 Extreme X6800 (2.93 GHz)	7803	14.52%
Core 2 Duo E6750 (2.66 GHz)	7425	20.35%
Core 2 Duo E6700 (2.66 GHz)	7334	21.84%
Pentium 4 550 (3.4 GHz)	4691	90.49%

PCMark05 Professional 1.2.0 - CPU Batch	Score	Difference
Core 2 Extreme "QX6950" (3.33 GHz)	10762	10.98%
Core 2 Extreme QX6850 (3 GHz)	9697
Core 2 Extreme QX6700 (2.66 GHz)	8619	12.51%
Core 2 Extreme X6800 (2.93 GHz)	7557	28.32%
Core 2 Duo E6750 (2.66 GHz)	6855	41.46%
Core 2 Duo E6700 (2.66 GHz)	6848	41.60%
Pentium 4 550 (3.4 GHz)	4097	136.69%