Radeon HD 4770 vs Radeon R9 270X

Intro

Compare all of that to the Radeon R9 270X, which comes with clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
Radeon R9 270X		180 Watts
	Difference: 100 Watts (125%)

Memory Bandwidth

The Radeon R9 270X should theoretically be a lot faster than the Radeon HD 4770 in general. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 128000 (250%)

Texel Rate

The Radeon R9 270X should be quite a bit (more or less 233%) more effective at texture filtering than the Radeon HD 4770. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 56000 (233%)

Pixel Rate

The Radeon R9 270X is a lot (approximately 167%) better at FSAA than the Radeon HD 4770, and also able to handle higher resolutions while still performing well. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 20000 (167%)

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 information (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.