Sapphire Radeon HD 5770 1GB and Radeon HD 5750 1GB video card review
 

Leading the line for this particular architecture is the Radeon HD 5770, which makes use of a fully functional core to deliver 800 Stream Processors and a core clock speed of 850MHz, giving 1.36 TeraFLOPs of computing power. This is matched up with 1GB of GDDR5 memory clocked at 1200MHz, while the board promises a maximum power consumption of 108 Watts, with power usage dropping to just 18 Watts at idle.

The Radeon HD 5750 on the other hand finds itself using a reduced core configuration with a reduced Stream Processor and texture unit count to make use of this GPU's built-in redundancy. This leaves the Radeon HD 5750 with 720 Stream Processors from nine SIMD units, while four texture units are disabled alongside this reduction to give 36 in total. The GPU core here is clocked at just 700MHz, although this configuration does survive with all sixteen ROPs intact, while its 1GB of GDDR5 memory is clocked only slightly lower than the Radeon HD 5770 at 1150MHz. This board boasts a maximum power output of 86 Watts, with a 16 Watt stated idle power consumption level.

http://www.elitebastards.com/index.p...d=13&Itemid=27