The 1650 requires a 300W PSU and you have a 260W in all likelihood. This video should be very helpful as it shows a PSU upgrade and various compatible GPU for your system.
The video recommended by JOcean is indeed very helpful. This guy had made many useful demo optiplex tear down n upgrade YouTube videos. the ASUS card you are interested in has a suitable length for 990 (less than 7”), its width is 5”. 990 MT case width is 6.89”.
JOcean
9 Legend
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12.6K Posts
0
December 20th, 2021 05:00
The 1650 requires a 300W PSU and you have a 260W in all likelihood. This video should be very helpful as it shows a PSU upgrade and various compatible GPU for your system.
redxps630
9 Legend
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15.3K Posts
0
December 20th, 2021 05:00
regarding psu JOcean is correct on 300w. Basic online psu calculator in best efficient scenario is Load Wattage: 246 W
Recommended PSU Wattage: 296 W
redxps630
9 Legend
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15.3K Posts
0
December 20th, 2021 05:00
The video recommended by JOcean is indeed very helpful. This guy had made many useful demo optiplex tear down n upgrade YouTube videos.
the ASUS card you are interested in has a suitable length for 990 (less than 7”),
its width is 5”. 990 MT case width is 6.89”.
bradthetechnut
7 Technologist
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9.2K Posts
0
December 20th, 2021 13:00
PSU 275w or higher is best for GTX 1650. PSU in 990 MT is 265w.
redxps630
9 Legend
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15.3K Posts
0
December 20th, 2021 15:00
User benchmark has validated OP card of interest ASUS Phoenix gtx1650
Asus, PH-GTX1650-O4G-P, NVIDIA GeForce GTX 1650, single-fan (1410 / 1500)
https://www.userbenchmark.com/UserRun/42556500