A little historical information which will help you understand what's going on right now...
First, 'Revolution' is a total misnomer. There's CC, CC3D, and Revo. They are three distinct designs. There is no 'Revo.' That's one point that makes Banggood look EXTEMELY suspect because they do that only to gain google hits. Some people have good results with BG boards and others don't.
Second, any retailer that sells a 'board' and displays it -only- inside a case is EXTREMELY suspect. There are re- and de-engineered versions of CC3D that leave parts out, change parts from the original design, and again some people have good luck with them and others don't.
Another 'for example,' there are 'slightly downgraded' versions of Revo that leave out the telemetry chip so they can sell it for a little less.
However I just noticed a part at BG that I'd not seen before that *APPEARS* to be a 'real' Revo board. Maybe BG has been spit and puked on for bad product enough that they decided they better deliver a -real- FC not a hack. The package sells for $96 which is the correct price. Meaning that they can't deliver a -real- Revo for less than that.
Another 'for example,' Hobbyking does sell 'real' CC3Ds. Their first ones were about $35 which was the right price. The others out there for $18 or whatever were hacks. Now theirs is $20 which is the 'right' price meaning that's what it costs to make them and sell for a profit. Unlike the $11 versions on ebay which are hacks. Basically, the hobbyist pays his money and takes his chances on a $250 aircraft whether the thing will come back when he asks it to or simply fly away, all for a $7 price difference. I think $7 is a pretty good price for better insurance that the aircraft will more likely come back than not.
For the -properly- produced boards from the -original- OP designs none of them are 'fake' as such. The first public release of the CC3D board designs were marked with a 'Rev C' text which OP decided meant that anything that they didn't personally produce were 'clones.' Which is of course patently ridiculous but -does- differentiate them from original OP boards and aftermarket boards. These aftermarket folks are SUPPOSED to negotiate with OP for permission to produce these for profit, with a small % going to OP. The OP forums said that HK did do that for a while, but later threw OP under the bus similar to the way they threw Rolf Bakke for his KK designs.
The Rev C means nothing any more -- there are hacks with the Rev C that do not follow the original design.
Westerners need to understand that the Chinese concept of intellectual property is different from Western philosophy and law. The Chinese do NOT respect ANY intellectual theft property laws. The believe that ALL 'ideas' are public domain, and that only physical property can be 'stolen.' That's why they have no problem with taking any knowledge from anywhere and doing anything with it that they want to.
Anyone who wants to design and build and sell a new product has to do it in secret, produce and sell as many as possible as fast as possible, and then JUMP OFF THE BUS AT THE RIGHT MOMENT and shut down production, because as soon as it is released for public consumption there will be an ARMY of Chinese engineers who will reverse engineer it for half the retail price. Whether right, neutral or wrong that's simply a fact of new millennial economic life.
But I digress.
If you can post a pic of the top side of the board you have, and name where you got it from, someone will be able to tell you its exact 'real/hack' status. There are new versions coming out frequently and it's very difficult to keep up with the many variations.