GeForce GTS 250 512MB vs Radeon RX 470 4GB

Intro

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

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

The Radeon RX 470 4GB should theoretically be a lot faster than the GeForce GTS 250 512MB overall. (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 will be much (about 151%) more effective at 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

If running with a high resolution is important to you, then the Radeon RX 470 4GB is the winner, by far. (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 data (in units of MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be 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 higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. 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 output 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 max fill rate.