GeForce GTS 250 512MB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which comes with a core clock frequency of 607 MHz and a GDDR5 memory speed of 802 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 352 SPUs, 44 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 512MB		145 Watts
GeForce GTX 465		200 Watts
	Difference: 55 Watts (38%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 465 should theoretically be quite a bit better than the GeForce GTS 250 512MB overall. (explain)

GeForce GTX 465		102592 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 32192 (46%)

Texel Rate

The GeForce GTS 250 512MB will be a lot (about 77%) better at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 20524 (77%)

Pixel Rate

The GeForce GTX 465 is a lot (about 64%) more effective at AA than the GeForce GTS 250 512MB, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 7616 (64%)

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 information (measured in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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