GeForce GTX 650 Ti 2GB vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which has a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 RAM set to run at 1425 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
Radeon R9 380 4G		190 Watts
	Difference: 80 Watts (73%)

Memory Bandwidth

Performance-wise, the Radeon R9 380 4G should in theory be much superior to the GeForce GTX 650 Ti 2GB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 96000 (111%)

Texel Rate

The Radeon R9 380 4G is quite a bit (about 83%) better at AF than the GeForce GTX 650 Ti 2GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 49248 (83%)

Pixel Rate

The Radeon R9 380 4G will be a lot (approximately 109%) more effective at full screen anti-aliasing than the GeForce GTX 650 Ti 2GB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 16192 (109%)

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 information (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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 - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.