Geforce GTX 770 vs Radeon HD 4850 512MB

Intro

Compare all that to the Radeon HD 4850 512MB, which comes with a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 RAM set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB		110 Watts
Geforce GTX 770		230 Watts
	Difference: 120 Watts (109%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 is 253% quicker than the Radeon HD 4850 512MB in general, because of its greater bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 160832 (253%)

Texel Rate

The Geforce GTX 770 is much (about 436%) faster with regards to anisotropic filtering than the Radeon HD 4850 512MB. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 108888 (436%)

Pixel Rate

The Geforce GTX 770 should be much (more or less 235%) faster with regards to AA than the Radeon HD 4850 512MB, and should be capable of handling higher resolutions better. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 23472 (235%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 can be processed in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number 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 outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.