Radeon R7 250X 2GB vs Radeon R9 295X2

Intro

Compare those specs to the Radeon R9 295X2, which comes with core speeds of 1018 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2816 SPUs along with 176 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon R9 295X2		500 Watts
	Difference: 405 Watts (426%)

Memory Bandwidth

Performance-wise, the Radeon R9 295X2 should theoretically be a lot better than the Radeon R7 250X 2GB in general. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 568000 (789%)

Texel Rate

The Radeon R9 295X2 will be a lot (about 796%) more effective at AF than the Radeon R7 250X 2GB. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 318336 (796%)

Pixel Rate

The Radeon R9 295X2 is a lot (about 714%) more effective at AA than the Radeon R7 250X 2GB, and will be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 114304 (714%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling 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 could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.