GeForce GTX 650 Ti vs Radeon HD 4850 512MB

Intro

Compare that to the Radeon HD 4850 512MB, which comes with clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti should be a lot faster than the Radeon HD 4850 512MB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 22848 (36%)

Texel Rate

The GeForce GTX 650 Ti is much (approximately 138%) faster with regards to anisotropic filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 34392 (138%)

Pixel Rate

The GeForce GTX 650 Ti should be quite a bit (about 48%) faster with regards to AA than the Radeon HD 4850 512MB, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 4848 (48%)

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 (measured in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its 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 core 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 rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.