Radeon HD 4550 256MB vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which features GPU clock speed of 1015 MHz, and 4096 MB of DDR3 RAM set to run at 1100 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M375 should be quite a bit faster than the Radeon HD 4550 256MB in general. (explain)

Radeon R9 M375		35200 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 22400 (175%)

Texel Rate

The Radeon R9 M375 is quite a bit (approximately 746%) more effective at texture filtering than the Radeon HD 4550 256MB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 35800 (746%)

Pixel Rate

The Radeon R9 M375 should be quite a bit (about 577%) faster with regards to AA than the Radeon HD 4550 256MB, and capable of handling higher resolutions more effectively. (explain)

Radeon R9 M375		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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It is worked out 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 it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.