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Windows 7: Poor memory bandwidth benchmarks (Geekbench 2.1)

11 May 2009   #1

Windows 7 Professional x64
Poor memory bandwidth benchmarks (Geekbench 2.1)

Hi all,

I'm running Windows 7 x64 on a new ASUS F81se notebook [Core2Duo P8600, 4Gb DDR2-800 RAM running at 667MHz - don't know why :-(] and ran the Geekbench x32 benchmark and got awful memory bandwidth scores, much worse than on my old Dell Inspiron 6400 [DDR2-667] I just replaced! Here are the stats:

Processor integer performance
Floating Point
Processor floating point performance
Memory performance
Memory bandwidth performance

Processor integer performance
Floating Point
Processor floating point performance
Memory performance
Memory bandwidth performance

Anyone have any idea why my memory performance might be so poor? Here's some info from SiSoft Sandra 15.96:

Model : Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz
Speed : 2.4GHz
Cores per Processor : 2 Unit(s)
Threads per Core : 1 Unit(s)
Type : Mobile, Dual-Core
Integrated Data Cache : 2x 32kB, Synchronous, Write-Thru, 8-way, 64 byte line size
L2 On-board Cache : 3MB, ECC, Synchronous, ATC, 12-way, 64 byte line size, 2 threads sharing

System : ASUSTeK Computer Inc. F81Se
Bus(es) : ISA PCI PCIe USB
Multi-Processor (MP) Support : No
Multi-Processor Advanced PIC (APIC) : No
BIOS : American Megatrends Inc. 207
Total Memory : 3GB DIMM DDR2

Model : ASUS 671MX
Front Side Bus Speed : 4x 267MHz (1GHz)
Total Memory : 2GB DIMM DDR2
Memory Bus Speed : 2x 334MHz (668MHz)

Thanks so much people!!

My System SpecsSystem Spec

11 May 2009   #2

7600.20510 x86

Using your bios, you could set the memory to full speed at 800 MHz, if the notebook supports that speed.
My System SpecsSystem Spec
11 May 2009   #3

Windows 7 Ult x64(x2), HomePrem x32(x4), Server 08 (+VM), 08 R2 (VM) , SuSe 11.2 (VM), XP 32 (VM)

also try using the benchmark on High performance instead of balanced...
i have seen Windows 7 is more aggressive in down clocking....
at least in my experience..
My System SpecsSystem Spec

12 May 2009   #4

Windows 7 Professional x64
But no cigar...

Hi peeps,

Thanks for your input! As to the suggestion to run the benchmark in the 'high performance' power profile - good suggestion, but that's the profile I was using :-) As for this laptop's BIOS, it's just awful - no meaningful user configurability at all (except the standard fare - IDE interfaces, boot order, etc..). No settings for memory speeds or timings, none for the CPU or buses, no AHCI settings, nothing. I'm quite disappointed.

I noticed that ASUS does not supply chipset drivers for this laptop model - could the lack of stock chipset drivers impact memory bandwidth/performance? I'm all out of ideas!!!

My System SpecsSystem Spec
13 May 2009   #5

Windows 7 Professional x64
Single Channel for DDR2 RAM?

Found some specs on the SIS site which may explain the poor memory performance:

Memory Channel

Memory Type

DDR2-667 / DDR2-533 / DDR2-400
Max Memory

Error Correction


My question - what is "single-channel" - should it be dual channel for DDR2 RAM??

My System SpecsSystem Spec
20 May 2009   #6

Windows 7, RTM x64

nvm I misread your OP lol..
My System SpecsSystem Spec
27 May 2009   #7

Windows 7 Professional x64

Well I know know what a dual-channel capable mobo is and apparently it only yields around a 5% boost, so that can't explain my poor bandwidth scores. Maybe I just got a lemon, ha ha
My System SpecsSystem Spec

 Poor memory bandwidth benchmarks (Geekbench 2.1)

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