GeForce GTX 465 vs GeForce GTX 980

Intro

Compare those specifications to the GeForce GTX 980, which has a GPU core clock speed of 1126 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 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 superior to the GeForce GTX 465 overall. (explain)

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

Texel Rate

The GeForce GTX 980 will be a lot (more or less 440%) more effective at texture filtering 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 a high resolution is important to you, then the GeForce GTX 980 is the winner, 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 max amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock 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 maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.