GeForce GTX 460 2GB vs GeForce GTX 650

Intro

Compare all of 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 RAM runs at a speed of 1250 MHz on this model. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 96 Watts (150%)

Memory Bandwidth

In theory, the GeForce GTX 460 2GB is 44% faster than the GeForce GTX 650 in general, because of its greater bandwidth. (explain)

GeForce GTX 460 2GB		115200 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 35200 (44%)

Texel Rate

The GeForce GTX 460 2GB is a small bit (approximately 12%) more effective at AF than the GeForce GTX 650. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 3944 (12%)

Pixel Rate

The GeForce GTX 460 2GB will be much (more or less 28%) faster with regards to anti-aliasing than the GeForce GTX 650, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 4672 (28%)

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 max amount of data (in units of megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 potential to get to the max fill rate.