Radeon HD 4750 vs Radeon R9 380 2G

Intro

Compare all of that to the Radeon R9 380 2G, which features a core clock speed of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

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

Performance-wise, the Radeon R9 380 2G should in theory be a lot superior to 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 (about 365%) better at AF than the Radeon HD 4750. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 380 2G is the winner, by a large margin. (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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR 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 can be applied in one second. This is worked out 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.