[SOLVED] Will a GTX 1060 3gb fit into an optiplex 990 mt?

Solution
Yes it will but you're going to need to make sure you have enough power for that new GPU. About 500~550W from a branded PSU, to be exact.

seanbailey260

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MakotoSGT

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It will, but any optiplex i came across has a bad Airflow when you drop in a GPU.

Plus the PSU is very rarely able to support said GPU.
Make sure it has a branded PSU before you buy one.
And even after that, just be careful with the temps.