Radeon HD 4750 vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which features core speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1120(224x5) SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
Radeon HD 5830		175 Watts
	Difference: 100 Watts (133%)

Memory Bandwidth

Theoretically, the Radeon HD 5830 should be quite a bit faster than the Radeon HD 4750 in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 76800 (150%)

Texel Rate

The Radeon HD 5830 should be quite a bit (about 92%) faster with regards to texture filtering than the Radeon HD 4750. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 21440 (92%)

Pixel Rate

The Radeon HD 5830 is a small bit (approximately 10%) better at anti-aliasing than the Radeon HD 4750, and will be capable of handling higher resolutions better. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 1120 (10%)

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 (in units of MB per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.