GeForce GTX 285 2GB vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which makes use of a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 memory is set to run at a frequency of 1425 MHz on this particular card. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380X		190 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 14 Watts (7%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380X should be a small bit faster than the GeForce GTX 285 2GB overall. (explain)

Radeon R9 380X		182400 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 23424 (15%)

Texel Rate

The Radeon R9 380X is much (more or less 140%) faster with regards to anisotropic filtering than the GeForce GTX 285 2GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 72320 (140%)

Pixel Rate

The Radeon R9 380X is quite a bit (about 50%) faster with regards to anti-aliasing than the GeForce GTX 285 2GB, and also able to handle higher resolutions while still performing well. (explain)

Radeon R9 380X		31040 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 10304 (50%)

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 (measured in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock 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 memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.