GeForce 8800 GTX vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this card. It features 384 SPUs as well as 32 TAUs and 16 ROPs.

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

Performance-wise, the GeForce 8800 GTX should in theory be just a bit better than the GeForce GTX 650 in general. (explain)

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

Texel Rate

The GeForce 8800 GTX will be a bit (about 9%) more effective at AF 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 (more or less 23%) more effective at anti-aliasing than the GeForce 8800 GTX, and also will be able to handle higher resolutions better. (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 largest amount of data (measured in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 in one second. This is calculated 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.