Radeon HD 4830 1GB vs Radeon R9 280

Intro

Compare those specs to the Radeon R9 280, which uses a 28 nm design. AMD has set the core speed at 933 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this model. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 280 should theoretically be quite a bit faster than the Radeon HD 4830 1GB overall. (explain)

Radeon R9 280		240000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 182400 (317%)

Texel Rate

The Radeon R9 280 should be a lot (more or less 468%) better at anisotropic filtering than the Radeon HD 4830 1GB. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 86096 (468%)

Pixel Rate

The Radeon R9 280 will be quite a bit (more or less 225%) faster with regards to anti-aliasing than the Radeon HD 4830 1GB, and also should be able to handle higher resolutions more effectively. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 20656 (225%)

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 (in units of megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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 ability to get to the max fill rate.