GeForce GTS 250 1GB vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which has a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is made up 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)

GeForce GTS 250 1GB		145 Watts
Radeon R9 380X		190 Watts
	Difference: 45 Watts (31%)

Memory Bandwidth

Performance-wise, the Radeon R9 380X should theoretically be quite a bit superior to the GeForce GTS 250 1GB in general. (explain)

Radeon R9 380X		182400 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 112000 (159%)

Texel Rate

The Radeon R9 380X will be quite a bit (approximately 163%) faster with regards to anisotropic filtering than the GeForce GTS 250 1GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 76928 (163%)

Pixel Rate

The Radeon R9 380X is much (approximately 163%) better at FSAA than the GeForce GTS 250 1GB, and also capable of handling higher resolutions better. (explain)

Radeon R9 380X		31040 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 19232 (163%)

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 (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its 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 core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.