SPACI score report for 3f8n in ASTRAL 2.04:

PDB Entry: 3f8n
SPACI score: 0.1
AEROSPACI score: 0.1

Experiment type: XRAY
Resolution: 3.15
R-factor: 0.277
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.32
WCK2 WHAT_CHECK Ramachandran: -5.244
WCK3 WHAT_CHECK Chi angles: -5.155
WCK4 WHAT_CHECK Backbone: -3.453

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).