GeForce GTX 650 Ti vs Radeon HD 5870

Intro

Compare that to the Radeon HD 5870, which comes with a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It is made up of 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
Radeon HD 5870		188 Watts
	Difference: 78 Watts (71%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 should perform quite a bit faster than the GeForce GTX 650 Ti in general. (explain)

Radeon HD 5870		153600 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 67200 (78%)

Texel Rate

The Radeon HD 5870 is a bit (about 14%) better at anisotropic filtering than the GeForce GTX 650 Ti. (explain)

Radeon HD 5870		68000 Mtexels/sec
GeForce GTX 650 Ti		59392 Mtexels/sec
	Difference: 8608 (14%)

Pixel Rate

The Radeon HD 5870 is much (about 83%) more effective at FSAA than the GeForce GTX 650 Ti, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 5870		27200 Mpixels/sec
GeForce GTX 650 Ti		14848 Mpixels/sec
	Difference: 12352 (83%)

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 (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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