GeForce GTX 280 vs GeForce GTX 465

Intro

Compare those specs to the GeForce GTX 465, which comes with a clock frequency of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also features a 256-bit memory 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 GTX 465		200 Watts
GeForce GTX 280		236 Watts
	Difference: 36 Watts (18%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 280 should in theory be a lot superior to the GeForce GTX 465 overall. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 39104 (38%)

Texel Rate

The GeForce GTX 280 is quite a bit (more or less 80%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 280		48160 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 21452 (80%)

Pixel Rate

The GeForce GTX 465 will be a small bit (approximately 1%) more effective at full screen anti-aliasing than the GeForce GTX 280, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 160 (1%)

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 maximum amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.