Radeon HD 4730 vs Radeon HD 5830

Intro

Compare those specifications to the Radeon HD 5830, which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this card. It features 1120(224x5) SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4730		140 Watts
Radeon HD 5830		175 Watts
	Difference: 35 Watts (25%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should perform a lot faster than the Radeon HD 4730 overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 70400 (122%)

Texel Rate

The Radeon HD 5830 should be a lot (approximately 100%) faster with regards to anisotropic filtering than the Radeon HD 4730. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 22400 (100%)

Pixel Rate

The Radeon HD 5830 will be much (approximately 129%) faster with regards to FSAA than the Radeon HD 4730, and also will be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 5830		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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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