AMD are starting to roll out their socketed Kabini APUs for desktop platforms, and it turns out you'll be able to grab one for as low as $31. Based on the Jaguar microarchitecture - the same architecture used in the Xbox One and PlayStation 4's semi-custom AMD-made APU - the chips are aimed at low-power and small-form-factor systems.
The $31 APU in question is the AMD Sempron 2650, and comes with two cores clocked at 1.45 GHz, accompanied by 1 MB of L2 cache and a Radeon HD 8240 graphics core. For just $5 more ($36 in total), you can get a sizable spec upgrade through the Sempron 3850, which packs four 1.3 GHz Jaguar cores with 2 MB of L2 cache and a Radeon HD 8280 GPU.
The two higher-end, yet still cheap options are the Athlon 5350 and Athlon 5150 for $54 and $45 respectively. Both come with four cores, 2 MB of L2 cache and a Radeon HD 8400 GPU, but are clocked at 1.6 GHz (for the 5150) and 2.05 GHz (for the 5350).
While AMD has listed all four socketed Kabini chips at prices under $55, retailers such as Amazon are currently selling them higher than the recommended price. Motherboards to support the chips are still elusive, despite showing up as early as CES 2014.
It's interesting to note that AMD's desktop Kabini parts have a TDP of 25W, which is significantly higher than competing Bay Trail Atom parts from Intel that feature a 10W TDP. It's also possible to pick up a dual-core Haswell-based Intel Celeron G1820 CPU, with a TDP of 54W, for as low as $49, which may make the Kabini parts a hard sell where TDP isn't an issue.