I see you using a Cooler Master’s Classic, the good old CM 690. However, you have not mentioned the space at the top, which is capable of holding two 140 mm fans and the 80 mm fan to the rear of the CPU, with these additional fans in place, you will see a significant drop in temps particular the CPU with the rear fan.
I have this case, ironically I found the more fans I added the quieter my PC became. Through the Motherboard’s Cool n’ Quiet, each fan is aware of each other and slows down accordingly.
A common mistake made by PC builder is they are not aware of fans blowing in two directions i.e. you rear fans should be blowing out and up, your bottom fan should be blowing in and to the left in your picture, the front fan should blow in a upwards direction as well and so on. Fans indicate air directions on the side of the fan. Air should come in at the front, and bottom of your case raising on hot air from your components to create a draft throughout exiting the heat at the top and rear, get this wrong and you add 5-10OC to your temps. Try it and see the difference.
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Gigabyte GA-MA790FX-UD5P, AMD 955BE, Geil Value Dual Channel 4GB DDR3-1600,
ATI 5850 1GB, Cooler Master CM90 II Advanced, 1TB Western Digital Caviar Black,
Jeantech Storm 700w, Asus Xonar Essence STX, Pinnacle PCTV 3010iX Dual Analogue + DVB-T.
i dont see how the fan at the bottom pushing air up works, is there a vent under the fan sucking air up from the underneath? is this a high dust risk? or am i missing something here