The hd4890 is more powerful in my opinion and it uses more power.
You can see what I mean here http://www.hwcompare.com/10035/radeon-hd-4890-1gb-vs-radeon-hd-6790/
The hd4890 is more powerful in my opinion and it uses more power.
You can see what I mean here http://www.hwcompare.com/10035/radeon-hd-4890-1gb-vs-radeon-hd-6790/
ok, i saw that
the refrence hd4890 core clock is 850Mhz while that hd 4890 core clock was clocked at 1000Mhz!!!