GeForce GTX 285 1GB vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which comes with a core clock frequency of 900 MHz and a GDDR5 memory speed of 1400 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It features 1280 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 54 Watts (36%)

Memory Bandwidth

In theory, the Radeon R9 270 should be a small bit faster than the GeForce GTX 285 1GB overall. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 20224 (13%)

Texel Rate

The Radeon R9 270 should be much (about 39%) better at AF than the GeForce GTX 285 1GB. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 20160 (39%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 270 is superior to the GeForce GTX 285 1GB, and very much so. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 8064 (39%)

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 moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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