Flames rendering in Cycles

Support Particles and Physics Simulations
1

So I was finally happy with the result I got in the rendered view port:
http://i.imgur.com/GonrP91.png
when I hit render, it came out with this disappointing result:
http://i.imgur.com/kopExX5.png

any idea why this happened?

By the way, why can’t cycles render flames with GPU yet? Is there any newer version that supports it?

2

any idea why this happened?
Any blend file so we know what you are rendering

By the way, why can’t cycles render flames with GPU yet? Is there any newer version that supports it?
Because it will need someone to implement it.
Current features https://www.blender.org/manual/render/cycles/features.html