GeForce GTX 275 vs GeForce GTX 460 1GB

Intro

Compare those specs to the GeForce GTX 460 1GB, which features GPU core speed of 675 MHz, and 1024 MB of GDDR5 RAM running at 900 MHz through a 256-bit bus. It also is made up of 336 SPUs, 56 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB		160 Watts
GeForce GTX 275		219 Watts
	Difference: 59 Watts (37%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 should be 10% quicker than the GeForce GTX 460 1GB in general, because of its greater data rate. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 460 1GB		115200 MB/sec
	Difference: 11808 (10%)

Texel Rate

The GeForce GTX 275 is a lot (approximately 34%) faster with regards to AF than the GeForce GTX 460 1GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 460 1GB		37800 Mtexels/sec
	Difference: 12840 (34%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 460 1GB is a better choice, by far. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 3876 (22%)

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 max amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.