Geforce GTX 670 vs Radeon HD 4850 1GB

Intro

Compare those specs to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 RAM is set to run at a frequency of 993 MHz on this model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 1GB		110 Watts
Geforce GTX 670		170 Watts
	Difference: 60 Watts (55%)

Memory Bandwidth

The Geforce GTX 670 should in theory be much faster than the Radeon HD 4850 1GB overall. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 128448 (202%)

Texel Rate

The Geforce GTX 670 will be a lot (about 310%) better at AF than the Radeon HD 4850 1GB. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 77480 (310%)

Pixel Rate

The Geforce GTX 670 is much (more or less 193%) better at full screen anti-aliasing than the Radeon HD 4850 1GB, and able to handle higher screen resolutions without slowing down too much. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 19280 (193%)

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 data (counted in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per 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 higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.