GeForce 9800 GT 512MB vs GeForce GTX 650 Ti 2GB

Intro

Compare those specifications to the GeForce GTX 650 Ti 2GB, which features GPU clock speed of 928 MHz, and 2048 MB of GDDR5 RAM set to run at 1350 MHz through a 128-bit bus. It also features 768 Stream Processors, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 5 Watts (5%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti 2GB should theoretically be much better than the GeForce 9800 GT 512MB overall. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 28800 (50%)

Texel Rate

The GeForce GTX 650 Ti 2GB should be quite a bit (more or less 77%) better at AF than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 25792 (77%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 650 Ti 2GB is superior to the GeForce 9800 GT 512MB, and very much so. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 5248 (55%)

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 (measured in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.