Bought a official grill case from Shuttle for my SN85G4v2.
Before:
CPU - Idle 32oC
Full Load 45oC
Ambient - Idle 32oC
Full Load 34oC
HDD - Idle 30oC
Full Load 36oC
GFX - Idle Core 60oC / Ambient 42oC ( 22% fan speed )
Full Load ( GFX card full load not cpu ) Core 58oC / Ambient 45oC ( 100% fan speed )
After :
CPU - Idle 32oC
Full Load 45oC
Ambient - Idle 36oC
Full Load 40oC
HDD - Idle 34oC
Full Load 36oC
GFX - Idle Core 53oC / Ambient 39oC ( 22% fan speed )
Full Load ( GFX card full load not cpu ) Core 51oC / Ambient 38oC ( 100% fan speed )
So if you need to cool that GFX down this is the case for you, but you will have to sacrifise some cpu and ambinet temp