GeForce 830M vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which comes with core clock speeds of 650 MHz on the GPU, and 800 MHz on the 512 MB of DDR3 memory. It features 80(16x5) SPUs as well as 8 Texture Address Units 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 830M		25 Watts
	Difference: 6 Watts (32%)

Memory Bandwidth

Theoretically speaking, the GeForce 830M should be 13% faster than the Radeon HD 5450 overall, because of its greater bandwidth. (explain)

GeForce 830M		14400 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 830M should be quite a bit (about 217%) faster with regards to anisotropic filtering than the Radeon HD 5450. (explain)

GeForce 830M		16464 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 11264 (217%)

Pixel Rate

The GeForce 830M is much (more or less 217%) faster with regards to anti-aliasing than the Radeon HD 5450, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce 830M		8232 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 5632 (217%)

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 largest amount of information (measured in MB 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 clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. 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 output rate also depends on quite a few 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.