GeForce GTS 250 512MB vs Radeon RX 470 4GB

Intro

Compare those specs to the Radeon RX 470 4GB, which has a core clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also uses a 256-bit memory bus, and makes use of a 14 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB		120 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 25 Watts (21%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 4GB is 200% quicker than the GeForce GTS 250 512MB overall, because of its higher bandwidth. (explain)

Radeon RX 470 4GB		211200 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 140800 (200%)

Texel Rate

The Radeon RX 470 4GB is much (about 151%) faster with regards to AF than the GeForce GTS 250 512MB. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 71296 (151%)

Pixel Rate

The Radeon RX 470 4GB should be quite a bit (about 151%) faster with regards to full screen anti-aliasing than the GeForce GTS 250 512MB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 17824 (151%)

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 (measured in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 are applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels the graphics 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 number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.