Radeon HD 4750 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which has GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM set to run at 1425 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 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 4G		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

In theory, the Radeon R9 380 4G should be a lot faster than the Radeon HD 4750 in general. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 131200 (256%)

Texel Rate

The Radeon R9 380 4G should be a lot (about 365%) better at anisotropic filtering than the Radeon HD 4750. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 85280 (365%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon HD 4750, by a large margin. (explain)

Radeon R9 380 4G		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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.