GeForce GTX Titan Black vs Radeon HD 4890 1GB

Intro

Compare all of that to the Radeon HD 4890 1GB, which makes use of a 55 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory runs at a speed of 975 MHz on this specific model. 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)

Radeon HD 4890 1GB		190 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

Performance-wise, the GeForce GTX Titan Black should theoretically be much superior to the Radeon HD 4890 1GB overall. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 4890 1GB		124800 MB/sec
	Difference: 211200 (169%)

Texel Rate

The GeForce GTX Titan Black will be a lot (approximately 433%) faster with regards to texture filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 173360 (433%)

Pixel Rate

The GeForce GTX Titan Black is quite a bit (more or less 167%) faster with regards to AA than the Radeon HD 4890 1GB, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 4890 1GB		16000 Mpixels/sec
	Difference: 26672 (167%)

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 max amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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