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

Intro

Compare those specifications to the Radeon R9 380 4G, which comes with a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 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

In theory, the Radeon R9 380 4G should be 111% faster than the GeForce GTX 650 Ti 2GB overall, due to its higher bandwidth. (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 should be much (about 83%) faster with regards to 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 should be a lot (approximately 109%) better at AA than the GeForce GTX 650 Ti 2GB, and also will be capable of handling higher screen resolutions without losing too much performance. (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 data (in units of MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, 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 that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.