GeForce GTS 450 1GB vs Radeon RX 580

Intro

Compare those specs to the Radeon RX 580, which has GPU core speed of 1257 MHz, and 8192 MB of GDDR5 memory running at 2000 MHz through a 256-bit bus. It also is made up of 2304 Stream Processors, 144 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon RX 580		185 Watts
	Difference: 79 Watts (75%)

Memory Bandwidth

The Radeon RX 580 should theoretically be much faster than the GeForce GTS 450 1GB in general. (explain)

Radeon RX 580		262144 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 204416 (354%)

Texel Rate

The Radeon RX 580 should be much (approximately 622%) faster with regards to AF than the GeForce GTS 450 1GB. (explain)

Radeon RX 580		181008 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 155952 (622%)

Pixel Rate

The Radeon RX 580 is much (more or less 221%) more effective at AA than the GeForce GTS 450 1GB, and should be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 580		40224 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 27696 (221%)

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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it 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 can be processed per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.