GeForce GTX 850M vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which uses a 40 nm design. AMD has clocked the core speed at 650 MHz. The DDR3 memory is set to run at a speed of 800 MHz on this specific model. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GTX 850M		40 Watts
	Difference: 21 Watts (111%)

Memory Bandwidth

Performance-wise, the GeForce GTX 850M should in theory be quite a bit superior to the Radeon HD 5450 overall. (explain)

GeForce GTX 850M		32000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 19200 (150%)

Texel Rate

The GeForce GTX 850M should be much (approximately 574%) better at AF than the Radeon HD 5450. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 29840 (574%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 850M is superior to the Radeon HD 5450, and very much so. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 11416 (439%)

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 (in units of MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, 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 the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.