GeForce 8800 GT 1GB vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this specific model. It features 384 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce 8800 GT 1GB		105 Watts
	Difference: 41 Watts (64%)

Memory Bandwidth

Theoretically, the GeForce GTX 650 should be quite a bit faster than the GeForce 8800 GT 1GB overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 22400 (39%)

Texel Rate

The GeForce GTX 650 should be just a bit (approximately 1%) better at anisotropic filtering than the GeForce 8800 GT 1GB. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 256 (1%)

Pixel Rate

The GeForce GTX 650 should be much (more or less 76%) better at anti-aliasing than the GeForce 8800 GT 1GB, and capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 8800 GT 1GB		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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at 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 chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.