GeForce GTX 650 Ti 2GB vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which has a clock frequency of 925 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, 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 HD 7970		250 Watts
	Difference: 140 Watts (127%)

Memory Bandwidth

The Radeon HD 7970 should in theory perform a lot faster than the GeForce GTX 650 Ti 2GB overall. (explain)

Radeon HD 7970		264000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 177600 (206%)

Texel Rate

The Radeon HD 7970 will be quite a bit (about 99%) better at anisotropic filtering than the GeForce GTX 650 Ti 2GB. (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 59008 (99%)

Pixel Rate

The Radeon HD 7970 will be a lot (more or less 99%) faster with regards to full screen anti-aliasing than the GeForce GTX 650 Ti 2GB, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 7970		29600 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 14752 (99%)

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 megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics card will be at 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 that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.