Geforce GTX 770 vs Radeon HD 3850 X2

Intro

Compare all that to the Radeon HD 3850 X2, which features core clock speeds of 668 MHz on the GPU, and 828 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Geforce GTX 770, in theory, should be quite a bit faster than the Radeon HD 3850 X2 in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 3850 X2		105984 MB/sec
	Difference: 118400 (112%)

Texel Rate

The Geforce GTX 770 is much (about 526%) better at texture filtering than the Radeon HD 3850 X2. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 3850 X2		21376 Mtexels/sec
	Difference: 112512 (526%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 770 is the winner, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 3850 X2		21376 Mpixels/sec
	Difference: 12096 (57%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.