No, you can not. PCe slot is for PCe Card. And AGP Slot...
6 Answers · Computers & Internet · 05/12/2006
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371016 will fit in your case and will easily handle your 6870 now and will easily handle two down the road if you want to and have a Crossfire compatible motherboard.
2 Answers · Computers & Internet · 25/02/2012
HOLD Your build is kinda inaccurate. A10 were made for those who cannot afford gpu, which is not in your case. $800 include monitor, keyboard mouse and original OS. Assuming keyboard, mouse, original window 8 and monitor used up $250...
2 Answers · Computers & Internet · 19/05/2014