Which Intel Processor is equal to the AMD 4800x2 +?

slightly better than the E6400 at gaming.

edit: I meant worse, wow bad typo (completely different word)

From the benchmarks I've seen, it goes approximately like this:

Athlon X2 3600 = Pentium D 925

Athlon X2 3800 = Pentium D 935

Athlon X2 4000 = Pentium D 945/Core 2 Duo e4300

Athlon X2 4200 = Core 2 Duo e4300

Athlon X2 4400 = Core 2 Duo e4400

Athlon X2 4600 = Core 2 Duo e6300

Athlon X2 4800 = Core 2 Duo e6300

Athlon X2 5000 = Core 2 Duo e6300/6400

Athlon X2 5200 = Core 2 Duo e6400/6420

Athlon X2 5400 = Core 2 Duo e6420

Athlon X2 5600 = Core 2 Duo e6600

Athlon X2 6000 = Core 2 Duo e6600/6700

And I don't really pay attention to the FX models, so I won't list them.