GeForce GTX 570 vs Radeon HD 4890 1GB

Intro

Compare those specs to the Radeon HD 4890 1GB, which comes with core clock speeds of 1000 MHz on the GPU, and 975 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator 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 perform much faster than the Radeon HD 4890 1GB overall. (explain)

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

Texel Rate

The GeForce GTX 570 is a little bit (about 10%) better at 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

The GeForce GTX 570 is a lot (about 83%) more effective at FSAA than the Radeon HD 4890 1GB, and should be able to handle higher resolutions without slowing down too much. (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 largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per 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 - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.