Radeon HD 4770 vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which has core speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. 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 4770		80 Watts
Radeon R9 280X		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

The Radeon R9 280X, in theory, should perform much faster than the Radeon HD 4770 in general. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 236800 (463%)

Texel Rate

The Radeon R9 280X is much (about 353%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 84800 (353%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 280X is a better choice, by far. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 15200 (127%)

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 data (measured in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 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 AA, 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 of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one 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 rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.