GeForce GTS 450 1GB vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which comes with a GPU core clock speed of 1050 MHz, and 8192 MB of GDDR5 memory running at 1500 MHz through a 512-bit bus. It also features 2816 SPUs, 176 TAUs, and 64 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 R9 390X 8G		275 Watts
	Difference: 169 Watts (159%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should be 565% faster than the GeForce GTS 450 1GB overall, due to its greater bandwidth. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 326272 (565%)

Texel Rate

The Radeon R9 390X 8G is quite a bit (about 638%) more effective at texture filtering than the GeForce GTS 450 1GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 159744 (638%)

Pixel Rate

The Radeon R9 390X 8G will be much (approximately 436%) faster with regards to anti-aliasing than the GeForce GTS 450 1GB, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 54672 (436%)

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 largest amount of data (measured in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could 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 Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.