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Radeon R9 285 vs Radeon RX 6500 XT

Intro

The Radeon R9 285 has 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 features 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon RX 6500 XT, which makes use of a 6 nm design. AMD has clocked the core speed at 2200 MHz. The GDDR6 memory works at a speed of 2250 MHz on this particular card. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6500 XT 107 Watts
Radeon R9 285 190 Watts
Difference: 83 Watts (78%)

Memory Bandwidth

Performance-wise, the Radeon R9 285 should theoretically be a little bit better than the Radeon RX 6500 XT overall. (explain)

Radeon R9 285 176000 MB/sec
Radeon RX 6500 XT 147456 MB/sec
Difference: 28544 (19%)

Texel Rate

The Radeon RX 6500 XT should be much (more or less 37%) more effective at anisotropic filtering than the Radeon R9 285. (explain)

Radeon RX 6500 XT 140800 Mtexels/sec
Radeon R9 285 102816 Mtexels/sec
Difference: 37984 (37%)

Pixel Rate

The Radeon RX 6500 XT will be quite a bit (approximately 140%) faster with regards to full screen anti-aliasing than the Radeon R9 285, and also will be able to handle higher resolutions better. (explain)

Radeon RX 6500 XT 70400 Mpixels/sec
Radeon R9 285 29376 Mpixels/sec
Difference: 41024 (140%)

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

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Radeon R9 285

Amazon.com

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Radeon RX 6500 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon R9 285 Radeon RX 6500 XT
Manufacturer AMD AMD
Year September 2014 January 2022
Code Name Tonga PRO Navi 24 XT
Memory 2048 MB 4096 MB
Core Speed 918 MHz 2200 MHz
Memory Speed 5500 MHz 4500 GB/s
Power (Max TDP) 190 watts 107 watts
Bandwidth 176000 MB/sec 147456 MB/sec
Texel Rate 102816 Mtexels/sec 140800 Mtexels/sec
Pixel Rate 29376 Mpixels/sec 70400 Mpixels/sec
Unified Shaders 1792 1024
Texture Mapping Units 112 64
Render Output Units 32 32
Bus Type GDDR5 GDDR6
Bus Width 256-bit 64-bit
Fab Process 28 nm 6 nm
Transistors 5000 million 5400 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 12.0 DirectX 12
OpenGL Version OpenGL 4.4 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few 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.

Display Prices

Hide Prices

Radeon R9 285

Amazon.com

Check prices at:

Radeon RX 6500 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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