Radeon HD 4670 1GB vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which has core speeds of 650 MHz on the GPU, and 800 MHz on the 512 MB of DDR3 RAM. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 4670 1GB		70 Watts
	Difference: 51 Watts (268%)

Memory Bandwidth

In theory, the Radeon HD 4670 1GB will be 175% quicker than the Radeon HD 5450 in general, due to its higher bandwidth. (explain)

Radeon HD 4670 1GB		35200 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 22400 (175%)

Texel Rate

The Radeon HD 4670 1GB will be a lot (more or less 362%) better at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 18800 (362%)

Pixel Rate

The Radeon HD 4670 1GB should be much (more or less 131%) faster with regards to FSAA than the Radeon HD 5450, and also will be capable of handling higher resolutions better. (explain)

Radeon HD 4670 1GB		6000 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 3400 (131%)

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: Bandwidth is the largest amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number 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 video 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 maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.