I used to get around 2200 floating point and 10000 integer on my 64 bit linux with the 6.2.12 BOINC manager (I installed this one from the ubuntu Add/Remove program list). Now I get just 1600 floating point and 4500 integer with 6.4.5 with the 64bit BOINC manager I downloaded from this website. I'm using an e6600 at stock. I claim about half the credits I used to at ABC@home now. I did update my BIOS though...

Make sure absolutely nothing CPU intensive is running, make sure not other programs are running when you run benchmarks.

On Windows I see a large drop in benchmarks when I just have Winamp sit in my systemtray. It doesn't even have to do anything, just be loaded in memory!

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I used to get [...] with the 6.2.12 BOINC manager (I installed this one from the ubuntu Add/Remove program list). Now I get [...] with 6.4.5 with the 64bit BOINC manager I downloaded from this website

Don't compare BOINC from Ubuntu with BOINC from official website, they might be compiled differently. For example, BOINC website gives statically-linked binaries that work anywhere, Ubuntu gives binaries dynamically linked to the libraries it also distributes.

I claim about half the credits I used to at ABC@home now.

I thought ABC@Home had fixed credits anyway...?

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