HIS did an outstanding job with their Radeon HD 5750 iCooler IV design. Offering performance between HD 4850 and HD 4870, the card has enough power for most games at moderate resolutions. Due to its more power efficient design, it can take leading spots in idle power consumption and performance per Watt. If you spend most of your day at the desktop idle, working office apps or surfing the Web, the ~20W saved might be able to make quite a difference over time. HIS selected Arctic Cooling as their partner for the thermal solution, which paid off very nicely. Together with the optimized fan speed settings in the VGA BIOS, the card runs at one of the lowest fan noises I have ever experienced on a graphics card.
Our sample showed some impressive overclocking capabilities. Both core and and memory could be overclocked by 20%. If you are willing to go this route, you could easily save some money and get performance similar to the HD 5770 or HD 4870.
When looking at pure performance per buck you will be disappointed however. AMD's HD 4850 can be had at substantially lower price levels (-30%) than the HD 5750 and offers similar performance (-8%). I have to admit that the new features like DirectX 11, EyeFinity, native HDMI & DisplayPort warrant a price increase, but these features are not important for everyone. So the bottom line is: if you want the best bang for the buck right now, go with the HD 4850. If you want a longer term investment in future technologies, check out the HD 5750. When you have to select between different manufacturers my pick would be the HIS Radeon HD 5750 iCooler IV. Compared to offerings from other AIBs it provides, what I would call, the optimum synergy between low fan noise, low temperatures and good overclockability.