GeForce GT 450 (OEM) vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 512-bit bus, and makes use of a 28 nm design. It features 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon R9 390 8G		275 Watts
	Difference: 169 Watts (159%)

Memory Bandwidth

In theory, the Radeon R9 390 8G should perform a lot faster than the GeForce GT 450 (OEM) in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 288000 (300%)

Texel Rate

The Radeon R9 390 8G is much (about 744%) better at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 141040 (744%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 390 8G is superior to the GeForce GT 450 (OEM), by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 45040 (238%)

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 (counted in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, 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 amount of pixels that the graphics chip could possibly record 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.