Yes absolutely. I think 400w has one and 500w has two. You can ask Dell chat to email you pictures.  You can also get the 460w psu for XPS 8950 which is c/w 7000. I think it is available on eBay[URL] (available) you see, Dell has validated  300w psu for Optiplex HD2W8 300W, Acbel (XPS 8950, Precision 3460/3660, Optiplex 3000/5000/7000)3XY3J 300W, Chicony (XPS 8950, Precision 3460/3660, Optiplex 3000/5000/7000/XE4)6R2MV 300W, Delta (XPS 8950, Precision 3460/3660, Optiplex 3000/5000/7000/XE4)MJXT6 300W, LiteOn (XPS 8950, Precision 3460/3660, Optiplex 3000/5000/7000/XE4) since 300w xps 8950 psu with 8 pin connector are compatible with optiplex, it can be presumed that the 460w psu for 8950 with 8 pin would also work for optiplex, although Dell has not validated these psu for optiplex.
Video Card GTX 1650 for Optiplex 3000 Torre