Wait for 390X?

ArielElia95

Distinguished
Oct 20, 2013
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Hello,
This is my rig:

Intel Core i7 860@2.93GHz
GIGABYTE GA-P55-UD3L
Sapphire ATI Radeon HD5870
G.Skill Ripjaws-X 2x8GB DDR3 1600Mhz
WesternDigital 1TB
650W SeaSonic
CoolerMaster CM690

I have a few question about the 390X:
All of this is assuming I'm getting the HD5870 out of the case of course.
1. Will it fit, physically, in my case?
2. Will my PSU (probably) fit to its consume?
3. Is there a date or something that it's expected to be released?
4. Is there any limit (like PCI-E connection or fitting with the motherboard or CPU and etc) that I should know?

Thanks.