GeForce GTX 285 2GB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which uses a 40 nm design. nVidia has clocked the core frequency at 607 MHz. The GDDR5 memory runs at a speed of 802 MHz on this particular card. It features 352 SPUs as well as 44 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 4 Watts (2%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB is 55% faster than the GeForce GTX 465 overall, due to its higher data rate. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 56384 (55%)

Texel Rate

The GeForce GTX 285 2GB will be quite a bit (more or less 94%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 25132 (94%)

Pixel Rate

The GeForce GTX 285 2GB should be a little bit (more or less 7%) better at full screen anti-aliasing than the GeForce GTX 465, and able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 1312 (7%)

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 largest amount of data (measured in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.