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Poor Bandwidth efficiency sandra memory benchmark

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Xarick

Golden Member
I have 2x512 of pc6400 ddr2 800 ram by ampo. I ran the sandra memory bandwidth and it came out to only 5300 with 62% efficiency. Is there something wrong with my system or is this normal?
 
Q: Why do some systems show close to 95% bandwidth efficiency and others less than 80%?
A: While the code for all CPUs is heavily optimised, the effciency depends on chipset performance and memory settings. Only the most aggressive settings may yield > 80% efficiency, thus anything higher is a bonus.

Q: Which memory has better efficiency: SDRAM, DDR, RDRAM, etc?
A: Mostly, memory bandwidth performance depends on chipset architecture and memory timings, thus performance varies. A generic answer is beyond the scope of this document.

SiSoft FAQ

I would not worry too much about it.
 
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