Radeon HD 4750 vs Radeon R9 380 2G

Intro

Compare that to the Radeon R9 380 2G, which comes with core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
Radeon R9 380 2G		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 2G should in theory be a lot better than the Radeon HD 4750 overall. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 131200 (256%)

Texel Rate

The Radeon R9 380 2G is a lot (more or less 365%) better at anisotropic filtering than the Radeon HD 4750. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 85280 (365%)

Pixel Rate

The Radeon R9 380 2G should be quite a bit (approximately 166%) better at AA than the Radeon HD 4750, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 19360 (166%)

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 largest amount of information (measured in MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.