Re: concern about it
OOOOH, you mean the backplate is too thick so it's causing your motherboard to bend?
Well in that case, as fat.clown said, make sure you attach the risers to your mobo. e.g. these things:
"As a result of all this hardship, dirt, thirst, and wombats, you would expect Australians to be a sour lot. Instead, they are genial, jolly, cheerful, and always willing to share a kind word with a stranger, unless they are an American." -- Douglas Adams