GeForce GT 450 (OEM) vs Radeon R9 280

Intro

Compare those specifications to the Radeon R9 280, which uses a 28 nm design. AMD has set the core speed at 933 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this specific model. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon R9 280		250 Watts
	Difference: 144 Watts (136%)

Memory Bandwidth

In theory, the Radeon R9 280 should be 150% quicker than the GeForce GT 450 (OEM) overall, because of its greater data rate. (explain)

Radeon R9 280		240000 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 144000 (150%)

Texel Rate

The Radeon R9 280 will be quite a bit (more or less 451%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)

Radeon R9 280		104496 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 85536 (451%)

Pixel Rate

The Radeon R9 280 should be quite a bit (approximately 57%) faster with regards to anti-aliasing than the GeForce GT 450 (OEM), and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 280		29856 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 10896 (57%)

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 max 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 bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.