Radeon HD 5750 512MB vs Radeon HD 7770

Intro

Compare those specs to the Radeon HD 7770, which comes with a clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon HD 5750 512MB		86 Watts
	Difference: 6 Watts (8%)

Memory Bandwidth

Performance-wise, the Radeon HD 5750 512MB should theoretically be a bit superior to the Radeon HD 7770 overall. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 7770 will be quite a bit (about 59%) more effective at anisotropic filtering than the Radeon HD 5750 512MB. (explain)

Radeon HD 7770		40000 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 14800 (59%)

Pixel Rate

The Radeon HD 7770 is quite a bit (approximately 43%) faster with regards to FSAA than the Radeon HD 5750 512MB, and should be able to handle higher resolutions better. (explain)

Radeon HD 7770		16000 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 4800 (43%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.