Radeon R7 250X 2GB vs Radeon R9 380X

Intro

Compare that to the Radeon R9 380X, which makes use of a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 RAM works at a frequency of 1425 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon R9 380X		190 Watts
	Difference: 95 Watts (100%)

Memory Bandwidth

The Radeon R9 380X, in theory, should perform quite a bit faster than the Radeon R7 250X 2GB overall. (explain)

Radeon R9 380X		182400 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 110400 (153%)

Texel Rate

The Radeon R9 380X is a lot (about 210%) more effective at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 84160 (210%)

Pixel Rate

The Radeon R9 380X should be quite a bit (approximately 94%) more effective at FSAA than the Radeon R7 250X 2GB, and will be capable of handling higher resolutions better. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 15040 (94%)

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 data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied in one second. This number 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 potential to get to the maximum fill rate.