Radeon HD 4830 1GB vs Radeon R7 260X

Intro

Compare all that to the Radeon R7 260X, which features a clock speed of 1100 MHz and a GDDR5 memory speed of 1625 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
Radeon R7 260X		115 Watts
	Difference: 20 Watts (21%)

Memory Bandwidth

In theory, the Radeon R7 260X will be 81% faster than the Radeon HD 4830 1GB overall, due to its higher bandwidth. (explain)

Radeon R7 260X		104000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 46400 (81%)

Texel Rate

The Radeon R7 260X will be a lot (more or less 235%) more effective at AF than the Radeon HD 4830 1GB. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 43200 (235%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 260X is a better choice, and very much so. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 8400 (91%)

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 (measured in MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.