|     |                                  | 价格    | TDP  | 链接                                                                                                                                                                                                                                                         |
| --- | -------------------------------- | ----- | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| CPU | 9950X散片                          | 5049  | 170W | https://item.jd.com/10230949423323.html?pcdk=RZpQDk-5H6ETdUiMWFDYB0qYe_5eGUkcxZqSMLusfveBb1Z7B7voPPS1CVWGeVep.rQ4a.tlbT&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuMyUyM3NrdV9jYXJkJTQwMTc4NTQ4NDU0NTg0NCUyMzE3NzgyNDk5MjYwODcxMjgxNTYzNTQ0JTIzNzc5NDUyNDk3    |
| 主板  | X870E TOMAHAWK WIFI              |       | 80W  |                                                                                                                                                                                                                                                            |
| 散热  | 利民（thermalright）Frozen Prism 360 | 334   |      | https://item.jd.com/100057441433.html?pcdk=GiODs0teTjhhzLvERJ9Xh7bErePo9DIg9BlhvFcYN2_TjhXNHZ80O4KKTgWRvH_Y.3z6a.aI3x&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuMSUyM3NrdV9jYXJkJTQwMTc4NTQ4NjkwMjU2MCUyMzE3NzgyNDk5MjYwODcxMjgxNTYzNTQ0JTIzNDQ2MTIwMzc5      |
| 电源  | 利民（thermalright）额定1200W          | 529   |      | https://item.jd.com/100061685965.html?pcdk=9DKiYq1pM67e4C_SMlb9ELpz8H8omnxurgMrr2_7wnL4uEswx_phRVd0GvI2ASZV.3z6a.aI3x&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuNiUyM3NrdV9jYXJkJTQwMTc4NTQ4Njk3Njc1MCUyMzE3NzgyNDk5MjYwODcxMjgxNTYzNTQ0JTIzMjA0MTAzNjk4Ng    |
| 内存  | 汉存(HC)玄甲 DDR5精挑颗粒白/黑             | 3399  |      | https://item.jd.com/10230984252710.html?pcdk=3XAWmiZbtnQAcqSnr0yNYHQy96WFIgeHSanUhNNNRoVf4NXHKT3WalDa6dLGhAvg.rQ4a.tlbT&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuMTglMjNza3VfY2FyZCU0MDE3ODU0ODU4MTY5MjElMjMxNzc4MjQ5OTI2MDg3MTI4MTU2MzU0NCUyMzE5NDY0ODY2ODg |
| 硬盘  | GEIL金邦PCIE4.0 SSD 4T 4300MB/S    | 2829  |      | https://item.jd.com/10167064030260.html?pcdk=7BycdKhoy2k7EMmQORGrnYgqFl_efQujPgkjm1-hnlY_PyRXtnD74znaFFgFztBn.3z6a.aI3x&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuMzAlMjNza3VfY2FyZCU0MDE3ODU0ODYyNzE0NjQlMjMxNzc4MjQ5OTI2MDg3MTI4MTU2MzU0NCUyMzIwNTEzMjkyNQ  |
| 显卡  | 二手3090                           | 8199  | 350W | https://item.jd.com/10141106351957.html?pcdk=1oeEDi20ZX-ZoG9wkvi5eEeICSWwOKXa7ogTOUMPfoRYxqIsuXrm0t9ON49u96kC.3z6a.aI3x&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuMiUyM3NrdV9jYXJkJTQwMTc4NTQ4NjQwMjY0MiUyMzE3NzgyNDk5MjYwODcxMjgxNTYzNTQ0JTIzMjg2MzY0OTAw    |
| 机箱  | 长城（Great Wall）黑匣子09              | 559   |      | https://item.jd.com/100151744889.html?pcdk=r3rOv54Y3fsHPk1JrPp1pxW3hxwx4FdEupJnoac2eHJ8UNaEThyaNihQKn6kNXbN.3z6a.aI3x&spmTag=YTAyNDAuYjAwMjQ5My5jMDAwMDQwMjcuMyUyM3NrdV9jYXJkJTQwMTc4NTQ4NzExMTEzNSUyMzE3NzgyNDk5MjYwODcxMjgxNTYzNTQ0JTIzMTk3NDYzMTM4OQ    |
| 总计  |                                  | 20898 |      |                                                                                                                                                                                                                                                            |

深度学习：
CPU核心
	计算a+b, CPU 要准备数据 主内存->L3->L2->L1 ->寄存器。数据在寄存器中才能计算。
	L1访问延迟0.5ns
	L2延迟7ns (14xL1)
	主内存延迟100ns (200 xL1)
	所以提升数据时间和空间内存本地性。
	如果一个矩阵是按行（row）存储，CPU一次读取64字节，1FLOP=4字节，CPU一次读16X4 等于2行。CPU读行快一些。读列比较慢。 CPU会预读缓存。
	CPU编程 C++或任何高性能语言
	
GPU
	控制语句支持有限
	Nvidia用Cuda
	其他用OpenCL
CPU/GPU带宽
	PCIe 3.0 x16 : 16GB/s
	CPU 内存 30GB/s
	GPU 480GB/s
	不要频繁在CPU和GPU之间传数据