GeForce GTX 460 1GB 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 memory works at a frequency of 1250 MHz on this model. It features 384 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 460 1GB		160 Watts
	Difference: 96 Watts (150%)

Memory Bandwidth

In theory, the GeForce GTX 460 1GB will be 44% faster than the GeForce GTX 650 in general, due to its greater data rate. (explain)

GeForce GTX 460 1GB		115200 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 35200 (44%)

Texel Rate

The GeForce GTX 460 1GB should be a small bit (about 12%) better at texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 460 1GB		37800 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 3944 (12%)

Pixel Rate

The GeForce GTX 460 1GB will be a lot (about 28%) better at FSAA than the GeForce GTX 650, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 460 1GB		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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.