GeForce GTX 285 2GB vs GeForce GTX 470

Intro

Compare all of that to the GeForce GTX 470, which features a core clock speed of 607 MHz and a GDDR5 memory frequency of 837 MHz. It also uses a 320-bit bus, and uses a 40 nm design. It is comprised of 448 SPUs, 56 TAUs, and 40 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
GeForce GTX 470		215 Watts
	Difference: 11 Watts (5%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should in theory be just a bit superior to the GeForce GTX 470 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 470		133920 MB/sec
	Difference: 25056 (19%)

Texel Rate

The GeForce GTX 285 2GB should be a lot (about 53%) better at texture filtering than the GeForce GTX 470. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 17848 (53%)

Pixel Rate

The GeForce GTX 470 should be a small bit (about 17%) faster with regards to full screen anti-aliasing than the GeForce GTX 285 2GB, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 3544 (17%)

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 (counted in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.