GeForce 9800 GTX vs GeForce GTX 650

Intro

Compare those specs to the GeForce GTX 650, which features a core clock frequency of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 16 ROPs.

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

Theoretically speaking, the GeForce GTX 650 should perform a bit faster than 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 should be a lot (approximately 28%) better at texture filtering than the GeForce GTX 650. (explain)

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

Pixel Rate

The GeForce GTX 650 should be a lot (more or less 57%) more effective at FSAA than the GeForce 9800 GTX, and will be capable of handling higher resolutions better. (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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 can be processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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