Radeon HD 4750 vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which has GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is made up of 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 4G		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

In theory, the Radeon R9 380 4G is 256% quicker than the Radeon HD 4750 in general, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 380 4G will 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

The Radeon R9 380 4G is a lot (more or less 166%) faster with regards to anti-aliasing than the Radeon HD 4750, and also capable of handling higher resolutions without slowing down too much. (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 data (counted in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount 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 fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.