What Is The Best Air Cooler Under $40 That Will Fit
Case: unknown Inside Width 6 1/2in
MOBO: ASUS - M2N32-SLI Deluxe
Space For Cooler
Front To Back 5 inches
Top To Bottom 4 inches
Cpu: AMD Phenom II X4 925 2.8 ghz Stock Cooler
Memory: G.SKILL 4GB (2 x 2GB) Dual Channel Kit 2.20 inch Tall
This Is The Only One I Found That Will Fit ARCTIC Freezer A30 Extreme
Is There Any Cooler That Is Better
I Will Be Overclocking The CPU to 3.5ghz
I once had a "Arctic Cooling Freezer 13" on my "Phenom II x6 1090T BE".
When i OCed it to 4.0 GHz (from 3.2 stock clock) this cooler still kept my CPU temps under 60°C and it was almost not to hear.
To test the max temp i used prime95 for about 3 hours.
Now i have a "Antec Kühler 620" running the pump at 80%. I also removed the loud Antec fan and placed a "Cougar Vortex PWM 120" fan on the rad. But its a little more expensive.
The A30 Freezer is a pretty solid aftermarket solution, it is roughly equivalent to the Cooler Master Hyper 212 EVO.
After looking at your motherboard, it appears that you are at the mercy of aftermarket cooling solutions that allow for multiple mounting directions. Otherwise, it'll be hard to find a cooling solution that allows for 55-56mm RAM clearance that still fits in your case dimensions.
I don't really know what else to recommend that fits the bill.