GeForce GTX 960 vs Radeon HD 4890 2GB

Intro

Compare all of that to the Radeon HD 4890 2GB, which comes with clock speeds of 1000 MHz on the GPU, and 975 MHz on the 2048 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 960		120 Watts
Radeon HD 4890 2GB		190 Watts
	Difference: 70 Watts (58%)

Memory Bandwidth

Theoretically, the Radeon HD 4890 2GB should perform a bit faster than the GeForce GTX 960 overall. (explain)

Radeon HD 4890 2GB		124800 MB/sec
GeForce GTX 960		112000 MB/sec
	Difference: 12800 (11%)

Texel Rate

The GeForce GTX 960 should be quite a bit (more or less 80%) better at AF than the Radeon HD 4890 2GB. (explain)

GeForce GTX 960		72128 Mtexels/sec
Radeon HD 4890 2GB		40000 Mtexels/sec
	Difference: 32128 (80%)

Pixel Rate

The GeForce GTX 960 is a lot (more or less 125%) more effective at anti-aliasing than the Radeon HD 4890 2GB, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 960		36064 Mpixels/sec
Radeon HD 4890 2GB		16000 Mpixels/sec
	Difference: 20064 (125%)

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 (measured in MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling 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 chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.