More points:
1) based on REFERENCE card, so again you must verify it works on other systems
2) some work but require a SHIM
3) The G10 is still about the same THICKNESS at some points, and the H55 tubing may have issues fitting in smaller cases.
(So I'd Google your exact case and see if it fits)
3) What is the COST of the H55 + G10?
I think it's about $100USD together.
4) So again, if you absolutely can't fit your card then you have a few options like:
a) R9-380X
b) GTX970
The GTX970 is more expensive, though again i don't know what you can sell your card for. It even has a few BLOWER style which exhaust almost all the heat outside the case. Obviously liquid cooling does too, but we don't know yet if that makes sense.
Here's some 970's that are either small, or blower style:
a) Small
http://pcpartpicker.com/part/asus-video-card-gtx970dcmoc4gd5
b) blower
http://pcpartpicker.com/part/msi-video-card-gtx9704gd5oc
http://pcpartpicker.com/part/gigabyte-video-card-gvn970ttoc4gd
http://pcpartpicker.com/part/asus-video-card-turbogtx970oc4gd5
So basically find out:
#1 - can you FIT the current card with tie wraps or similar?
#2 - Is the H55/G10 solution going to fit (may need shim etc)?
#3 - does H55/G10 make financial sense? (as opposed to selling current card and buying similar or better that fits)
#4 - For cards that do fit, do you have proper case EXHAUST to get rid of card heat?
#5 - Would a GTX970 blower style make sense?
It feels like you could SELL your current card and buy one that fits and possibly save some money, or perhaps upgrade to a better, compatible card for a similar price. Or perhaps sell the case if that's not a deal breaker.