Take note of the limits published on the
SFFLab M1 website in the graphics card compatibility section:
Cards over 2.2 slots (45mm):
- Length: 280mm (with front I/O ports), 290mm (with front I/O ports removed).
- Height: 130mm, 125mm at front corner (if over 280mm long)
The
Gigabyte card you listed has dimensions of L=286.5 W=114.5 H=50.2 mm. So its height (or thickness) is more than 45 mm. This means its length is longer than the limit with the Front I/O installed. If you remove the Front I/O it should fit, though getting a long card installed can be a bit tricky.
@Necere published some renders, which might show that your card may just fit, though it could be tight against the Front I/O cables. I'm not sure. Maybe he can respond to this post and offer an opinion.