GeForce GTX 280 vs GeForce GTX 465

Intro

Compare those specs to the GeForce GTX 465, which comes with GPU clock speed of 607 MHz, and 1024 MB of GDDR5 memory running at 802 MHz through a 256-bit bus. It also is comprised of 352 Stream Processors, 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 280		236 Watts
	Difference: 36 Watts (18%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 should be quite a bit faster than 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 will be a lot (more or less 80%) more effective at 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 should be a small bit (approximately 1%) better at FSAA than the GeForce GTX 280, and also will be able to handle higher resolutions while still performing well. (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 information (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed per second. This figure 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write 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 the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant 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.