GeForce GTX 570 vs Radeon HD 4890 1GB

Intro

Compare those specs to the Radeon HD 4890 1GB, which has a clock speed of 1000 MHz and a GDDR5 memory frequency of 975 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 1GB		190 Watts
GeForce GTX 570		219 Watts
	Difference: 29 Watts (15%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 570 should be quite a bit faster than the Radeon HD 4890 1GB in general. (explain)

GeForce GTX 570		152000 MB/sec
Radeon HD 4890 1GB		124800 MB/sec
	Difference: 27200 (22%)

Texel Rate

The GeForce GTX 570 will be just a bit (about 10%) faster with regards to AF than the Radeon HD 4890 1GB. (explain)

GeForce GTX 570		43920 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 3920 (10%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 570 is the winner, and very much so. (explain)

GeForce GTX 570		29280 Mpixels/sec
Radeon HD 4890 1GB		16000 Mpixels/sec
	Difference: 13280 (83%)

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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.