Radeon HD 4750 vs Radeon R9 M380

Intro

Compare that to the Radeon R9 M380, which comes with a clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M380 is 88% quicker than the Radeon HD 4750 overall, due to its greater bandwidth. (explain)

Radeon R9 M380		96000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 44800 (88%)

Texel Rate

The Radeon R9 M380 should be a lot (about 71%) more effective at texture filtering than the Radeon HD 4750. (explain)

Radeon R9 M380		40000 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 16640 (71%)

Pixel Rate

The Radeon R9 M380 should be quite a bit (about 37%) better at full screen anti-aliasing than the Radeon HD 4750, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M380		16000 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 4320 (37%)

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 (in units of MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends 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 max fill rate.