AMD is the name of CPU manufacturing company.

Athlon(tm)64 X2 is a CPU model.

(tm) stands for registered trademark, 64 stands for 64-bit CPU, and X2 stands for AMD's first dual-core CPU.

Dual-core means that your CPU is dual-core, and dual-core can be simply understood as two CPUs.

CPU is the abbreviation of English Central Processing Unit.

3800+ is the nominal PR value of your CPU performance. AMD thinks that the CPU produced by itself is equivalent to the CPU performance of the same generation made by Intel at 3800MHz, which means that your CPU is equivalent to the performance of Core 1 3.8 GHz. However, the actual tests of various websites show that this is not reliable, and your CPU actually runs at 2.0GHz.

Comprehensive description:

Athlon X2 3800+ is AMD's first dual-core processor with 90nm technology. Adopting 90um technology, the core code is "Windsor", the default frequency is 2.0GHz(200× 10), the working voltage is 1.4V, the power consumption is 65W, and MMX and 3DNOW are supported! +,SSE, SSE2, SSE3 and X86-64 instruction sets, built-in dual-channel DDR2-667/800 memory controller, supporting dual-channel memory up to DDR2-800.