Radeon HD 5750 512MB vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5750 512MB		86 Watts
	Difference: 31 Watts (56%)

Memory Bandwidth

In theory, the Radeon HD 5750 512MB should be a small bit faster than the Radeon HD 7750 overall. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 7750 should be a small bit (about 2%) better at AF than the Radeon HD 5750 512MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 400 (2%)

Pixel Rate

The Radeon HD 7750 will be a bit (about 14%) more effective at full screen anti-aliasing than the Radeon HD 5750 512MB, and should be able to handle higher screen resolutions better. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 1600 (14%)

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 largest amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.