I recently built a new PC and I have the Thermaltake SP-850M 850W as my PSU. My question is should I have the PSU installed with the fan down, as I have a bottom mounted Case. (Thermaltake Overseer RX-I VN700M1W2N). However if I do install it this way, the wording on the back of the exhaust would be upside down. Almost as a indication that the fan should be pointed up in the case. Any help would be welcome.