Radeon R9 285 vs Radeon R9 295X2

Intro

Compare those specs to the Radeon R9 295X2, which features a clock frequency of 1018 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 512-bit bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 Texture Address Units, and 64 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

Radeon R9 295X2		21205 points
Radeon R9 285		8500 points
	Difference: 12705 (149%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Radeon R9 295X2		500 Watts
	Difference: 310 Watts (163%)

Memory Bandwidth

As far as performance goes, the Radeon R9 295X2 should theoretically be quite a bit superior to the Radeon R9 285 overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 464000 (264%)

Texel Rate

The Radeon R9 295X2 will be a lot (about 249%) faster with regards to anisotropic filtering than the Radeon R9 285. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 255520 (249%)

Pixel Rate

The Radeon R9 295X2 should be much (more or less 344%) better at anti-aliasing than the Radeon R9 285, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 100928 (344%)

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 information (measured in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. 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 is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.