Geforce GTX 770 vs Radeon R9 285

Intro

Compare that to the Radeon R9 285, which uses a 28 nm design. AMD has set the core speed at 918 MHz. The GDDR5 RAM works at a frequency of 1375 MHz on this card. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

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

Radeon R9 285		8500 points
Geforce GTX 770		7854 points
	Difference: 646 (8%)

Ethereum Mining Hash Rate

Radeon R9 285		18 Mh/s
Geforce GTX 770		14 Mh/s
	Difference: 4 (29%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Geforce GTX 770		230 Watts
	Difference: 40 Watts (21%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 should be 27% faster than the Radeon R9 285 overall, due to its greater bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 48384 (27%)

Texel Rate

The Geforce GTX 770 should be quite a bit (more or less 30%) more effective at AF than the Radeon R9 285. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 31072 (30%)

Pixel Rate

The Geforce GTX 770 will be a little bit (more or less 14%) better at anti-aliasing than the Radeon R9 285, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 4096 (14%)

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 maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs 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 output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.