GeForce GTX 650 Ti vs Radeon HD 4850 1GB

Intro

Compare those specifications to the Radeon HD 4850 1GB, which comes with GPU clock speed of 625 MHz, and 1024 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 Ti should theoretically be quite a bit better than the Radeon HD 4850 1GB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 22848 (36%)

Texel Rate

The GeForce GTX 650 Ti will be quite a bit (more or less 138%) faster with regards to AF than the Radeon HD 4850 1GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 34392 (138%)

Pixel Rate

The GeForce GTX 650 Ti is quite a bit (approximately 48%) more effective at anti-aliasing than the Radeon HD 4850 1GB, and will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4850 1GB		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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.