GeForce GTX 280 vs GeForce GTX 465

Intro

Compare those specs to the GeForce GTX 465, which features GPU clock speed of 607 MHz, and 1024 MB of GDDR5 memory set to run at 802 MHz through a 256-bit bus. It also is comprised of 352 Stream Processors, 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

In theory, the GeForce GTX 280 will be 38% faster than the GeForce GTX 465 in general, because of its greater bandwidth. (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%) more effective at texture filtering than the GeForce GTX 465. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 465 is a better choice, but only just. (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 maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.