Radeon HD 4670 1GB vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 1120(224x5) SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Radeon HD 5830		175 Watts
	Difference: 105 Watts (150%)

Memory Bandwidth

Performance-wise, the Radeon HD 5830 should in theory be a lot better than the Radeon HD 4670 1GB overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 92800 (264%)

Texel Rate

The Radeon HD 5830 is much (more or less 87%) more effective at anisotropic filtering than the Radeon HD 4670 1GB. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 20800 (87%)

Pixel Rate

The Radeon HD 5830 is a lot (approximately 113%) faster with regards to FSAA than the Radeon HD 4670 1GB, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 6800 (113%)

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 (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.