Geforce GTX 690 vs Radeon R9 285

Intro

Compare all of that to the Radeon R9 285, which features a clock speed of 918 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 690		13111 points
Radeon R9 285		8500 points
	Difference: 4611 (54%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Geforce GTX 690		300 Watts
	Difference: 110 Watts (58%)

Memory Bandwidth

In theory, the Geforce GTX 690 is 118% faster than the Radeon R9 285 in general, because of its higher data rate. (explain)

Geforce GTX 690		384512 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 208512 (118%)

Texel Rate

The Geforce GTX 690 will be quite a bit (more or less 128%) faster with regards to texture filtering than the Radeon R9 285. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 131424 (128%)

Pixel Rate

The Geforce GTX 690 will be a lot (more or less 99%) better at full screen anti-aliasing than the Radeon R9 285, and able to handle higher resolutions better. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 29184 (99%)

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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.