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System Setup and Benchmarks
• Intel Pentium 4 3.06GHz 'Northwood' @ 23 x 133MHz FSB (3.06GHz)
• AMD Athlon XP2700+ 'Thoroughbred B' @ 13 x 166MHz FSB (2.17GHz)
• Intel Pentium 4 2.8 'Northwood' @ 21 x 133MHz FSB (2.8GHz)
• Intel D850EMV2, Intel i850e Chipset (with ICH2), Socket 478 Intel Pentium 4 RDRAM Motherboard supporting HyperThreading
• Gigabyte GA-8IHXP, Intel i850e Chipset (with ICH4), Socket 478 Intel Pentium 4 RDRAM Motherboard
• Asus A7N8X, NVIDIA nForce2 Chipset, Socket A Athlon XP DDR Motherboard
• 2 x 256Mb Corsair PC3200 DDR Memory Modules (CAS2, 2-5-2)
• 2 x 256Mb Samsung PC800 RDRAM (PC1066 mode, 4 x 133)
• 2 x 256Mb Samsung PC1060 RDRAM (PC1066 mode, 4 x 133)
• Sapphire ATI Radeon R9700 Pro 128MB
• Windows XP Professional Build 2600.xpclient.010817-1148
• Plutonium XP 8.1 Radeon Drivers (based on ATI CATALYST build 6166)
• Quake3 v1.30
• 3DMark 2001 Professional Second Edition
• Serious Sam: The Second Encounter Demo
• Comanche 4 Demo Benchmark
• Hexux version of PiFast version 4.1, by Xavier Gourdon
• LAME v3.92 MMX and RazorLame 1.1.5 front end
• VirtualDub and DivX 4.12
• Unreal Tournament 2003 Demo
• OcUK SETI Benchmark
The processor as supplied by Intel was a C1 stepping processor much like the 2.8GHz version before it. This means the same default core voltage of 1.525 Volts however the L1 cache layout has reverted back to pre C1 stepping P4 days. Here's 3 screenshots to illustrate.
2.26B cache layout
64 entries in the 4Kb pages cache entry
2.8 cache layout
128 entries in the 4Kb pages cache entry
3.06 cache layout
Reverted back to 64 entries in the 4Kb pages cache entry
Back when Tarinder looked at the 2.8GHz P4 for Hexus, he had this to say about the layout change.
The doubling of this entry seems to stand out here. Maybe useful for future Hyper-threading ?
That doesn't seem to be the case. Whatever the reason for the change for the 2.8GHz processor I'm unsure now as to what it is. The processor itself looks like any other regular Socket 478 Pentium 4 processor, no changes there.
3.06GHz Pentium 4 laid bare
One change in the packaging of the retail coolers is the heatsink. From this processor onwards, Pentium 4's will ship with an updated cooler with a copper core to cope with the extra heat from all the extra MHz.
As always, benchmarks were run 3 times and the upper and lower results discarded to leave the median result for the graphs. If any result differed by more than 5% from the other 2, all 3 results were discarded and a fresh 3 results were obtained. Excepting SETI due to the time taken to complete this benchmark.
Benchmarks were run with HyperThreading enabled and disabled to see what effect, if any, it would have on results. Remembering all Hexus benchmark tests are multiprocessor unaware and generally single threaded for their computationally intensive sections so HyperThreading's impact will generally be minimal. We'll discuss the merits or disadvantages depending on how you see it of not changing our benchmark suite to accomodate HyperThreading and SMP in general at the end of the review.
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