GeForce GTX 470 vs GeForce GTX 650 Ti 2GB

Intro

Compare that to the GeForce GTX 650 Ti 2GB, which comes with a clock frequency of 928 MHz and a GDDR5 memory frequency of 1350 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It features 768 SPUs, 64 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTX 470		215 Watts
	Difference: 105 Watts (95%)

Memory Bandwidth

Performance-wise, the GeForce GTX 470 should in theory be quite a bit superior to the GeForce GTX 650 Ti 2GB in general. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 47520 (55%)

Texel Rate

The GeForce GTX 650 Ti 2GB will be quite a bit (about 75%) faster with regards to AF than the GeForce GTX 470. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 25400 (75%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 470 is the winner, by far. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 9432 (64%)

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 moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.