GeForce GTX 650 Ti vs Radeon HD 5870

Intro

Compare all that to the Radeon HD 5870, which has core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 1600(320x5) SPUs along with 80 TAUs and 32 Rasterization Operator 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

Performance-wise, the Radeon HD 5870 should in theory be quite a bit superior to the GeForce GTX 650 Ti overall. (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 small bit (approximately 14%) more effective 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 will be quite a bit (approximately 83%) better at full screen anti-aliasing than the GeForce GTX 650 Ti, and also should be capable of handling higher screen resolutions better. (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 largest amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This 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 video card will be at handling 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 card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 maximum fill rate.