GeForce GT 450 (OEM) vs Radeon R9 280

Intro

Compare all of that to the Radeon R9 280, which comes with core clock speeds of 933 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 memory. It features 1792 SPUs along with 112 TAUs 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

Performance-wise, the Radeon R9 280 should theoretically be quite a bit better than the GeForce GT 450 (OEM) in general. (explain)

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

Texel Rate

The Radeon R9 280 is quite a bit (approximately 451%) faster with regards to anisotropic 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 (about 57%) better at FSAA than the GeForce GT 450 (OEM), and capable of handling higher resolutions better. (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: Bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.