Almost as fast as the E6550 and the 6000+
When it is overclocked to 3.10 GHz, where a core voltage tweak is not yet necessary and power dissipation lies at 75 Watts, the 5000+ Black Edition offers very good performance.

At this speed, the Black Edition can narrow the lead of Intel’s Core 2 Duo E6550 to only 2.5 %. It also catches up with its sibling, the Athlon 64 X2 6000+, trailing it by only 2.8 %.
Due to its smaller L2 cache size of only 512 Kbyte per core, it loses a lot of ground to the Core 2 Duo processors. However, as the video and audio encoding benchmarks show, cache isn’t everything. Here, the AMD CPU takes back some of the lost terrain.
Considering that you can overclock this processor with no effort whatsoever and don’t even need to tinker with the FSB thanks to the unlocked multiplier, AMD is basically giving its customers a free performance upgrade out of the box.
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I usually don't make accounts like this. But for this review I really had to.
TERRIBLE REVIEW, just awful. Very poorly written (several numerical mistakes) and very misleading.
Who compares a stock E6550 to a X2 5000+ with a 1.0Ghz OC advantage?
Worst of all, do you ever mention the E6550 is at stock? No...
Bert, Bert, Bert...
Don't tase my comparative analysis, bro!