Strange benchmark behaviour

[scoobysnack]

Hi
Have just replaced an Opteron144 which i ran at 2.475ghz(275*9) with a A64 3800+ single core which i'm running at 2.65ghz(265*10) as i thought it would be usefully quicker but when i ran the benchmarks i use (Aquamark3) i get much lower cpu scores (circa 50% drop). Any ideas as to why this might be?
I know it's quite an old benchmark program but i have a record of scores with it so i can compare any changes i make. The 3800+ runs a bit cooler so i might be able to go a bit further but i don't understand these scores.
M/b is a socket939 Abit AV8-3rd eye if it helps.

Hope someone has some ideas

SS

 

[scoobysnack]

Thanks for the replies so far. Any other ideas?

Is it anything to do with Aquamark3 being fairly old and maybe not entirely accurate with the latest cpu's?

SS

 

[scoobysnack]

Tried any other benchies, e.g. PCMark0x or 3DMark0x?

Would have to put old chip back in to run benchmarks and then swap chips and run again - too much hassle!
Also have now sold old chip on flea-bay.
SS

 

[scoobysnack]

why did you swap chips in the first place?

Thought it would be a useful upgrade - 2.5ghz to 2.65/2.7ghz at lower temps.

SS