Seems to be pretty good, but its hard to say. A competitor website found the fenrir slightly better (1C) on AMD, but it is about £10-15 more expensive, so it all depends what you need. I mainly bought the tranquilo for the silence, as it is drowned out by nearly anything else (i.e. the graphics card, PSU, other case fans). Only problem is that it can only be mounted so the fan faces the GPU, which means a lot of hot air is exhausted to the top of the case and the PSU, not the rear case fan.