Don't tell anyone, but it's supposed to be somewhat of a secret that the FX53VE is related to the GL553VE model.
If you don't mind sending me a private message with your serial number, I can confirm that it is using the GL553VE motherboard, or ASUS support should be able to do this as well.
Although other NVME M.2 SSDs have been approved for the GL553VE, ASUS hasn't officially approved the 960 Evo M.2 NVME M.2 SSD for the GL553VE, so not sure how well it will work, but probably worth looking into more if you can.
Probably a good idea to have some options just in case it doesn't work out, but so far don't have a reason to think it would not work other than ASUS hasn't approved it (or checked it?) and there hasn't been more feedback from other customers.
The GL553VD model uses a different motherboard than the GL553VE, but they are pretty similar as far as M.2 SSD support goes and one customer reports they were able to get the 960 Evo M.2 NVME M.2 SSD working on the GL553VD if that helps at all.
https://rog.asus.com/forum/showthread.php?93303-GL553-GL753-Samsung-SM951-128GB-M-2-Issues
By the way is that a 486 Overdrive processor for your profile picture and are you still running one of those systems? Haven't seen one in ages.
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