GeForce GT 450 (OEM) vs Radeon RX 580

Intro

Compare all that to the Radeon RX 580, which features a clock speed of 1257 MHz and a GDDR5 memory speed of 2000 MHz. It also makes use of a 256-bit bus, and makes use of a 14 nm design. It is comprised of 2304 SPUs, 144 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon RX 580		185 Watts
	Difference: 79 Watts (75%)

Memory Bandwidth

Performance-wise, the Radeon RX 580 should theoretically be much better than the GeForce GT 450 (OEM) overall. (explain)

Radeon RX 580		262144 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 166144 (173%)

Texel Rate

The Radeon RX 580 is quite a bit (about 855%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

Radeon RX 580		181008 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 162048 (855%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 580 is the winner, by far. (explain)

Radeon RX 580		40224 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 21264 (112%)

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 information (in units of MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount 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 the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.