GeForce GTX Titan Black vs Radeon HD 4850 2GB

Intro

Compare those specifications to the Radeon HD 4850 2GB, which has a core clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB		110 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 140 Watts (127%)

Memory Bandwidth

In theory, the GeForce GTX Titan Black should perform a lot faster than the Radeon HD 4850 2GB in general. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 272448 (429%)

Texel Rate

The GeForce GTX Titan Black is quite a bit (approximately 753%) more effective at texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 188360 (753%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX Titan Black is superior to the Radeon HD 4850 2GB, by a large margin. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 32672 (327%)

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 maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the 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 that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.