Radeon HD 4650 1GB vs Radeon R9 M375

Intro

Compare those specifications to the Radeon R9 M375, which comes with GPU clock speed of 1015 MHz, and 4096 MB of DDR3 memory running at 1100 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M375, in theory, should be quite a bit faster than the Radeon HD 4650 1GB in general. (explain)

Radeon R9 M375		35200 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 12800 (57%)

Texel Rate

The Radeon R9 M375 is a lot (about 111%) more effective at anisotropic filtering than the Radeon HD 4650 1GB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 21400 (111%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 M375 is the winner, by far. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 11440 (238%)

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 (counted in MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.