Radeon HD 5450 vs Radeon R9 M375X

Intro

Compare those specifications to the Radeon R9 M375X, which features GPU core speed of 1015 MHz, and 4096 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M375X should be much faster than the Radeon HD 5450 in general. (explain)

Radeon R9 M375X		72000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon R9 M375X is quite a bit (about 681%) more effective at texture filtering than the Radeon HD 5450. (explain)

Radeon R9 M375X		40600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 35400 (681%)

Pixel Rate

The Radeon R9 M375X is much (approximately 525%) more effective at full screen anti-aliasing than the Radeon HD 5450, and capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M375X		16240 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 13640 (525%)

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 largest amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 by the core speed of the chip. The better the texel rate, 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 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 ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.