In order to better do battle with Intel at the low-end of the dual-core market, AMD is launching an entry-level Athlon 64 X2 3800 which runs at 2GHz:

The Athlon 64 X2 3800+ will run at 2GHz and each core will have a 512KB secondary cache for rapid data retrieval. The chip costs $354 in quantities of 1,000. That's less than existing dual-core Athlons, but the chip also doesn't provide the same performance levels as the chips released earlier. The Athlon 64 X2 4200+, for instance, has the same size cache but runs at 2.2GHz.

This news article was written on August 1, 2005, quoting CNET News.