Radeon R7 250X 2GB vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which has GPU clock speed of 1120 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 55 Watts (58%)

Memory Bandwidth

Performance-wise, the Radeon RX 480 4GB should theoretically be a lot better than the Radeon R7 250X 2GB overall. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 157376 (219%)

Texel Rate

The Radeon RX 480 4GB is a lot (approximately 303%) better at texture filtering than the Radeon R7 250X 2GB. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 121280 (303%)

Pixel Rate

The Radeon RX 480 4GB is quite a bit (approximately 124%) better at anti-aliasing than the Radeon R7 250X 2GB, and should be able to handle higher resolutions better. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 19840 (124%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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