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GeForce GTX 460 1GB vs GeForce GTX 465

Intro

The GeForce GTX 460 1GB comes with a core clock frequency of 675 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It features 336 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare all that to the GeForce GTX 465, which features core clock speeds of 607 MHz on the GPU, and 802 MHz on the 1024 MB of GDDR5 memory. It features 352 SPUs along with 44 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB		160 Watts
GeForce GTX 465		200 Watts
	Difference: 40 Watts (25%)

Memory Bandwidth

Performance-wise, the GeForce GTX 460 1GB should in theory be just a bit superior to the GeForce GTX 465 in general. (explain)

GeForce GTX 460 1GB		115200 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 12608 (12%)

Texel Rate

The GeForce GTX 460 1GB should be quite a bit (approximately 42%) better at texture filtering than the GeForce GTX 465. (explain)

GeForce GTX 460 1GB		37800 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 11092 (42%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 460 1GB is superior to the GeForce GTX 465, but only just. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 2176 (11%)

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

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GeForce GTX 460 1GB

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GeForce GTX 465

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Specifications

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Model	GeForce GTX 460 1GB	GeForce GTX 465
Manufacturer	nVidia	nVidia
Year	July 2010	May 2010
Code Name	GF104	GF100
Memory	1024 MB	1024 MB
Core Speed	675 MHz	607 MHz
Memory Speed	3600 MHz	3208 MHz
Power (Max TDP)	160 watts	200 watts
Bandwidth	115200 MB/sec	102592 MB/sec
Texel Rate	37800 Mtexels/sec	26708 Mtexels/sec
Pixel Rate	21600 Mpixels/sec	19424 Mpixels/sec
Unified Shaders	336	352
Texture Mapping Units	56	44
Render Output Units	32	32
Bus Type	GDDR5	GDDR5
Bus Width	256-bit	256-bit
Fab Process	40 nm	40 nm
Transistors	1950 million	3000 million
Bus	PCIe x16	PCIe x16
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 4.1	OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

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