GeForce GTX 280 vs GeForce GTX 465

Intro

Compare those specifications to the GeForce GTX 465, which features a core clock frequency of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It features 352 SPUs, 44 Texture Address Units, and 32 Raster Operation Units.

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

Theoretically speaking, the GeForce GTX 280 will be 38% faster than the GeForce GTX 465 overall, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 280 will be much (more or less 80%) faster with regards to AF 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 little bit (about 1%) better at full screen anti-aliasing than the GeForce GTX 280, and also will be able to handle higher resolutions more effectively. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.