Poor memory bandwidth benchmarks (Geekbench 2.1)

[garethccc]

Hi all,

I'm running W7 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:

ASUS
[FONT=&quot]Integer[/FONT]
[FONT=&quot]Processor integer performance[/FONT]
[FONT=&quot]3426[/FONT]
[FONT=&quot]2499[/FONT]
[FONT=&quot]Floating Point[/FONT]
[FONT=&quot]Processor floating point performance[/FONT]
[FONT=&quot]2825[/FONT]
[FONT=&quot]Memory[/FONT]
[FONT=&quot]Memory performance[/FONT]
[FONT=&quot]1116[/FONT]
[FONT=&quot]Stream[/FONT]
[FONT=&quot]Memory bandwidth performance[/FONT]
[FONT=&quot]880[/FONT]

DELL
[FONT=&quot]Integer[/FONT]
[FONT=&quot]Processor integer performance[/FONT]
[FONT=&quot]2263[/FONT]
[FONT=&quot]1910[/FONT]
[FONT=&quot]Floating Point[/FONT]
[FONT=&quot]Processor floating point performance[/FONT]
[FONT=&quot]2091[/FONT]
[FONT=&quot]Memory[/FONT]
[FONT=&quot]Memory performance[/FONT]
[FONT=&quot]1197[/FONT]
[FONT=&quot]Stream[/FONT]
[FONT=&quot]Memory bandwidth performance[/FONT]
[FONT=&quot]1470[/FONT]

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

Processor
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
System : ASUSTeK Computer Inc. F81Se
Mainboard : PEGATRON CORPORATION 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

Chipset
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!!
G

 

[torrentg]

Using your bios, you could set the memory to full speed at 800 MHz, if the notebook supports that speed.

 

[darkassain]

also try using the benchmark on High performance instead of balanced...
i have seen Win7 is more aggressive in down clocking....
at least in my experience..

 

[garethccc]

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!!!

Cheers,
G

 

[garethccc]

Single Channel for DDR2 RAM?

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

Memory

Memory Channel
​

Single-Channel​

Memory Type
​

DDR2-667 / DDR2-533 / DDR2-400​

Max Memory
​

4GB​

Error Correction
​

Non-ECC​

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

Thanks!
G

 

[Espair]

nvm I misread your OP lol..

 

[garethccc]

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