AMD slipped information about their upcoming Athlon 64 X2 5000+ processor. This Socket 939 processor will be clocked at 2.6GHz with either 1MB (512KB per core) or 2MB L2 cache (1MB per core):
Document titled “AMD Athlon 64 Processor Power and Thermal Data Sheet” lists AMD Athlon 64 X2 5000+ processor for socket 939 and claims that it has 2600MHz core-clock and 2MB of cache (1MB per core) – exactly the same specifications as compared to AMD Athlon 64 FX-60. On the page 81 of the same document the chip is described as 2600MHz processor with 1MB of cache (512KB per core).
Given that AMD Athlon 64 X2 4800+ is a 2400MHz chip with 2MB cache, it is more likely that the second set of specifications is more correct, noted OverClockers.ru web-site, as AMD processors usually benefit more from higher clock-speeds, rather than from larger caches.