As we said in the introduction, you're simply not going to get the same "WOW" factor out of the HD 5750 version of the Vapor-X model for the simple reason being that it's a mid range card. No matter what a company does to these mid range cards, it's hard to get the same excitement from it when compared to something higher end like the HD 5870.
In saying that, however, the HD 5750 Vapor-X is hardly a bad card. Already impressed with what the stock model was capable of, it's good to see a small bump in performance when comparing outright FPS while at the same time getting better numbers off both the core and temperature thanks to the fan.
If you're thinking that the HD 5750 is for you and you don't mind spending the extra dollars, the Vapor-X version might be a better option. The extra few MHz on the core and memory give a small but consistent performance increase, while the new fan does an excellent job of cooling and also looking the part.
The Vapor-X series really is aimed at a different user group. While I find myself liking the ATOMIC series of video cards from Sapphire which bring with them a bigger increase in performance with similar noise and temperature levels to a standard model, others simply find themselves content with the out of the box performance of the stock models, whilst preferring to have a card that runs a little cooler and quieter.
If you're the latter, the Vapor-X series is for you. And look on the bright side; Sapphire even take the time to give us a small bump in performance. Having looked at both Vapor-X models from Sapphire, we find at the moment there's a clear hole in the middle. Hopefully the HD 5770 and HD 5850 get the Vapor-X treatment in the near future.
Dirt 2, new cooling, a small increase in performance and just an all round good card make the Vapor-X OC HD 5750 a card worth looking at. If you want even more performance now, you can at least know that you're buying a card that is giving you better cooling than a stock model and the ability to attack the clock speeds yourself.