GeForce 8800 GTX vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which uses a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this specific model. It features 384 SPUs along with 32 TAUs 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 GTX		155 Watts
	Difference: 91 Watts (142%)

Memory Bandwidth

In theory, the GeForce 8800 GTX should perform a bit faster than the GeForce GTX 650 overall. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 6400 (8%)

Texel Rate

The GeForce 8800 GTX is a little bit (approximately 9%) faster with regards to anisotropic filtering than the GeForce GTX 650. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 2944 (9%)

Pixel Rate

The GeForce GTX 650 should be much (about 23%) better at AA than the GeForce 8800 GTX, and also capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 3128 (23%)

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 (in units of MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.