Radeon HD 4730 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which uses a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM is set to run at a speed of 1125 MHz on this particular card. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 4730		140 Watts
	Difference: 85 Watts (155%)

Memory Bandwidth

The Radeon HD 7750, in theory, should perform much faster than the Radeon HD 4730 in general. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 14400 (25%)

Texel Rate

The Radeon HD 7750 should be a small bit (more or less 14%) faster with regards to texture filtering than the Radeon HD 4730. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 3200 (14%)

Pixel Rate

The Radeon HD 7750 will be a lot (more or less 129%) faster with regards to FSAA than the Radeon HD 4730, and also will be able to handle higher resolutions better. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 7200 (129%)

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 data (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.