Radeon HD 4830 512MB vs Radeon R7 260X

Intro

Compare those specs to the Radeon R7 260X, which makes use of a 28 nm design. AMD has set the core frequency at 1100 MHz. The GDDR5 RAM works at a frequency of 1625 MHz on this particular model. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
Radeon R7 260X		115 Watts
	Difference: 20 Watts (21%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 260X will be 81% quicker than the Radeon HD 4830 512MB overall, due to its higher bandwidth. (explain)

Radeon R7 260X		104000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 46400 (81%)

Texel Rate

The Radeon R7 260X should be a lot (more or less 235%) more effective at anisotropic filtering than the Radeon HD 4830 512MB. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 43200 (235%)

Pixel Rate

The Radeon R7 260X should be a lot (more or less 91%) faster with regards to anti-aliasing than the Radeon HD 4830 512MB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon HD 4830 512MB		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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.