GeForce GTX 465 vs GeForce GTX 980

Intro

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

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

In theory, the GeForce GTX 980 is 118% faster than the GeForce GTX 465 in general, because of its greater bandwidth. (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 (about 440%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

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

Pixel Rate

The GeForce GTX 980 is much (approximately 271%) more effective at AA than the GeForce GTX 465, and capable of handling higher screen resolutions without slowing down too much. (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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units 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 per second.

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