GeForce GTX 465 vs GeForce GTX 980

Intro

Compare those specs to the GeForce GTX 980, which comes with a clock frequency of 1126 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980		165 Watts
GeForce GTX 465		200 Watts
	Difference: 35 Watts (21%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980 should theoretically be quite a bit better than the GeForce GTX 465 in general. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 121408 (118%)

Texel Rate

The GeForce GTX 980 will be much (about 440%) faster with regards to AF than the GeForce GTX 465. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 117420 (440%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 980 is a better choice, by a large margin. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 52640 (271%)

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 (in units of MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.