GeForce GTS 250 1GB vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which features a clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
Radeon R9 380 4G		190 Watts
	Difference: 45 Watts (31%)

Memory Bandwidth

The Radeon R9 380 4G should in theory perform quite a bit faster than the GeForce GTS 250 1GB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 112000 (159%)

Texel Rate

The Radeon R9 380 4G is quite a bit (about 130%) faster with regards to AF than the GeForce GTS 250 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 61408 (130%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 380 4G is a better choice, and very much so. (explain)

Radeon R9 380 4G		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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 figure is worked out by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.