These fans are perfect to replace the failed ADDA fans in GX-520 and GX-620 SFF power supplies.
The GX-520 SFF power supply is model: H220P-01, P/N: HP-L2206F3P, Dell P/N: YD358.
The GX-620 SFF power supply is model: H27SP-00, P/N: HP-L275GF3P, Dell P/N: TD570
Sunon Part Number: KDE1207PHV1
Speed: 3300 RPM
Air Flow: 27 CFM
Noise: 31.5 dBA
Sunon Maglev Specs