Radeon HD 4550 256MB vs Radeon R9 M375X

Intro

Compare those specifications to the Radeon R9 M375X, which has a GPU core clock speed of 1015 MHz, and 4096 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also 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 M375X should perform a lot faster than the Radeon HD 4550 256MB in general. (explain)

Radeon R9 M375X		72000 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon R9 M375X is quite a bit (more or less 746%) better at AF than the Radeon HD 4550 256MB. (explain)

Radeon R9 M375X		40600 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 35800 (746%)

Pixel Rate

The Radeon R9 M375X is much (about 577%) more effective at AA than the Radeon HD 4550 256MB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M375X		16240 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 13840 (577%)

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 max amount of data (counted in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.