GeForce GTX 275 vs GeForce GTX 465

Intro

Compare all that to the GeForce GTX 465, which features a GPU core clock speed of 607 MHz, and 1024 MB of GDDR5 RAM running at 802 MHz through a 256-bit bus. It also features 352 SPUs, 44 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
GeForce GTX 275		219 Watts
	Difference: 19 Watts (10%)

Memory Bandwidth

Performance-wise, the GeForce GTX 275 should in theory be much better than the GeForce GTX 465 in general. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 24416 (24%)

Texel Rate

The GeForce GTX 275 should be quite a bit (about 90%) more effective at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 23932 (90%)

Pixel Rate

The GeForce GTX 465 is a little bit (approximately 10%) more effective at anti-aliasing than the GeForce GTX 275, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 1700 (10%)

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 information (measured in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 per second. This is worked out by multiplying the total texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock 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 lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.