This power supply is manufactured by BESTEC of Taiwan Province Province to Dell, and it belongs to the kind of strip power supply dedicated to small chassis. The rated power of this power supply is 250W, of which the output power of 12V is 204W, which is already the level of rated 270W power supply. Judging from the data given on the nameplate, this power supply is ok.
If your chassis can only hold this strip power supply, this power supply can be bought and used. Dell's disassembled goods on Taobao are concentrated around 90 yuan.