GeForce GTX Titan Black vs Radeon HD 4870 512MB

Intro

Compare all of that to the Radeon HD 4870 512MB, which has a clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It is made up 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 4870 512MB		150 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 100 Watts (67%)

Memory Bandwidth

Performance-wise, the GeForce GTX Titan Black should theoretically be quite a bit better than the Radeon HD 4870 512MB in general. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 4870 512MB		115200 MB/sec
	Difference: 220800 (192%)

Texel Rate

The GeForce GTX Titan Black should be quite a bit (about 611%) more effective at AF than the Radeon HD 4870 512MB. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 183360 (611%)

Pixel Rate

The GeForce GTX Titan Black will be much (approximately 256%) more effective at anti-aliasing than the Radeon HD 4870 512MB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 30672 (256%)

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 megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock 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 one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.