GeForce 9800 GT 512MB vs GeForce GTX 650

Intro

Compare those specs to the GeForce GTX 650, which has GPU core speed of 1058 MHz, and 1024 MB of GDDR5 RAM set to run at 1250 MHz through a 128-bit bus. It also features 384 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce 9800 GT 512MB		105 Watts
	Difference: 41 Watts (64%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 should in theory be much better than the GeForce 9800 GT 512MB overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 22400 (39%)

Texel Rate

The GeForce GTX 650 should be a small bit (about 1%) better at AF than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 256 (1%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 is a better choice, by a large margin. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 7328 (76%)

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 maximum amount of information (counted in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.