Radeon HD 4770 vs Radeon R7 260X

Intro

Compare those specifications to the Radeon R7 260X, which comes with a core clock speed of 1100 MHz and a GDDR5 memory speed of 1625 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
Radeon R7 260X		115 Watts
	Difference: 35 Watts (44%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 260X should be a lot faster than the Radeon HD 4770 in general. (explain)

Radeon R7 260X		104000 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 52800 (103%)

Texel Rate

The Radeon R7 260X is much (about 157%) more effective at AF than the Radeon HD 4770. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 37600 (157%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R7 260X is the winner, by a large margin. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 5600 (47%)

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 (in units of megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.