Radeon HD 4830 1GB vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which features clock speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
Radeon R9 280X		250 Watts
	Difference: 155 Watts (163%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X will be 400% faster than the Radeon HD 4830 1GB overall, because of its greater bandwidth. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 230400 (400%)

Texel Rate

The Radeon R9 280X will be a lot (about 491%) faster with regards to AF than the Radeon HD 4830 1GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 90400 (491%)

Pixel Rate

The Radeon R9 280X is much (more or less 196%) more effective at anti-aliasing than the Radeon HD 4830 1GB, and capable of handling higher resolutions more effectively. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 18000 (196%)

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 data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could 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 clock 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.