Geforce GTX 760 vs Radeon HD 4890 2GB

Intro

Compare that to the Radeon HD 4890 2GB, which features a core clock speed of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 760		170 Watts
Radeon HD 4890 2GB		190 Watts
	Difference: 20 Watts (12%)

Memory Bandwidth

In theory, the Geforce GTX 760 should perform quite a bit faster than the Radeon HD 4890 2GB overall. (explain)

Geforce GTX 760		192256 MB/sec
Radeon HD 4890 2GB		124800 MB/sec
	Difference: 67456 (54%)

Texel Rate

The Geforce GTX 760 is quite a bit (more or less 135%) more effective at AF than the Radeon HD 4890 2GB. (explain)

Geforce GTX 760		94080 Mtexels/sec
Radeon HD 4890 2GB		40000 Mtexels/sec
	Difference: 54080 (135%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 760 is the winner, by a large margin. (explain)

Geforce GTX 760		31360 Mpixels/sec
Radeon HD 4890 2GB		16000 Mpixels/sec
	Difference: 15360 (96%)

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 (in units of MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.