GeForce 9800 GTX vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which comes with 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 is made up of 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce 9800 GTX		140 Watts
	Difference: 76 Watts (119%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 should in theory be just a bit superior to the GeForce 9800 GTX in general. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 9600 (14%)

Texel Rate

The GeForce 9800 GTX will be a lot (more or less 28%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 9344 (28%)

Pixel Rate

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

GeForce GTX 650		16928 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 6128 (57%)

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 (counted in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must 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 anti-aliasing, 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 figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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 bandwidth is, the lower the ability to get to the maximum fill rate.