Radeon HD 6450 (OEM) vs Radeon R9 M290X

Intro

Compare all that to the Radeon R9 M290X, which has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 4096 MB of GDDR5 memory. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon R9 M290X		100 Watts
	Difference: 69 Watts (223%)

Memory Bandwidth

The Radeon R9 M290X, in theory, should be a lot faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 140800 (1100%)

Texel Rate

The Radeon R9 M290X is quite a bit (approximately 1260%) faster with regards to anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 63000 (1260%)

Pixel Rate

The Radeon R9 M290X will be a lot (more or less 988%) faster with regards to AA than the Radeon HD 6450 (OEM), and will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 24700 (988%)

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 maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the 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 most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.