GeForce GT 420 vs GeForce GTX 285 1GB

Intro

Compare that to the GeForce GTX 285 1GB, which comes with a clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also features a 512-bit bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 154 Watts (308%)

Memory Bandwidth

In theory, the GeForce GTX 285 1GB should be a lot faster than the GeForce GT 420 in general. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 130176 (452%)

Texel Rate

The GeForce GTX 285 1GB should be a lot (about 826%) better at AF than the GeForce GT 420. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 46240 (826%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 285 1GB is a better choice, and very much so. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 17936 (641%)

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 (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.