PCI FAN Intake or exhaust?

neogoldy2k

Honorable
Jun 8, 2013
1
0
10,510
Hi i have the 3930k with 2x7970 in a Thermaltake Element G VL10001W2Z
case
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/941712_619914174686395_1988795228_n.jpg

the air flow for my box is shown here

http://www.thermaltakeusa.com/Store/image/VL10001W2Z/vl10001w2z_airflow2.jpg

as i have both cards running the top card of course runs hotter than the bottom
temps are
84 c
and 72c

i run it at full load 24/7 i mine coins.

would a pci slot fan help my top card temps? and which type, or would adding 2 80 mm fans under main rear exahust fan (check airflow diag number 5) as the thermaltake case did not come stock with those fans.

thanks in advance