man i cant believe your pulling a 1000watts using PC fans, thats just isnt going to work out man, go to home depot and buy a inline 250CFM fan for 25.00 and cut a hole for it and install it, its still not going to bring you into the optimun temputure but its better than those fans.

i barely exhautsed a 150watthps using those fans so i cant imagine what that 1000watter is doing to them.