Back fan won't fit in Zalman Z11

killerkiller11

Honorable
Mar 25, 2013
9
0
10,510
Hello everybody.
I recently bought a Zalman Z11 and run into a little problem.
My aftermarket fan is blocking the back fan...
http://imageshack.us/a/img22/7365/6qnq.jpg
http://imageshack.us/a/img834/4083/egl5.jpg
http://imageshack.us/a/img109/5294/avfk.jpg
http://imageshack.us/a/img844/8341/7jj1.jpg
http://imageshack.us/a/img32/3217/vn8j.jpg
CPU: AMD Phenom II X4 965 B.E. @ 3.3GHz (undervolted)
Aftermarket cooler: Scythe Samuray ZZ
Motherboard: ASRock 960GM-GS3 FX
Case: Zalman Z11
Fan: Stock 120mm Zalman Z11

Next month I will upgrade my GPU to gtx 660, but before that, I want have some good airflow...
What should I do?
Should I change the aftermarket cooler? Should I buy a new motherboard? Should I mount the fan outside the case?