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Radeon R9 295X2 vs Radeon RX 6800 XT

Intro

The Radeon R9 295X2 comes with a GPU core clock speed of 1018 MHz, and the 4096 MB of GDDR5 RAM runs at 1250 MHz through a 512-bit bus. It also is comprised of 2816 SPUs, 176 TAUs, and 64 ROPs.

Compare those specs to the Radeon RX 6800 XT, which has core clock speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 4608 SPUs as well as 288 TAUs and 128 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 XT 300 Watts
Radeon R9 295X2 500 Watts
Difference: 200 Watts (67%)

Memory Bandwidth

Performance-wise, the Radeon R9 295X2 should in theory be much better than the Radeon RX 6800 XT in general. (explain)

Radeon R9 295X2 640000 MB/sec
Radeon RX 6800 XT 524288 MB/sec
Difference: 115712 (22%)

Texel Rate

The Radeon RX 6800 XT should be a lot (about 47%) faster with regards to AF than the Radeon R9 295X2. (explain)

Radeon RX 6800 XT 525600 Mtexels/sec
Radeon R9 295X2 358336 Mtexels/sec
Difference: 167264 (47%)

Pixel Rate

The Radeon RX 6800 XT is quite a bit (more or less 79%) better at FSAA than the Radeon R9 295X2, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 6800 XT 233600 Mpixels/sec
Radeon R9 295X2 130304 Mpixels/sec
Difference: 103296 (79%)

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

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Radeon R9 295X2

Amazon.com

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Radeon RX 6800 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 295X2 Radeon RX 6800 XT
Manufacturer AMD AMD
Year April 2014 November 2020
Code Name Vesuvius Navi 21
Memory 4096 MB (x2) 16384 MB
Core Speed 1018 MHz (x2) 1825 MHz
Memory Speed 5000 MHz (x2) 4000 GB/s
Power (Max TDP) 500 watts 300 watts
Bandwidth 640000 MB/sec 524288 MB/sec
Texel Rate 358336 Mtexels/sec 525600 Mtexels/sec
Pixel Rate 130304 Mpixels/sec 233600 Mpixels/sec
Unified Shaders 2816 (x2) 4608
Texture Mapping Units 176 (x2) 288
Render Output Units 64 (x2) 128
Bus Type GDDR5 GDDR6
Bus Width 512-bit (x2) 256-bit
Fab Process 28 nm 7 nm
Transistors 6200 million 26800 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.6

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon R9 295X2

Amazon.com

Check prices at:

Radeon RX 6800 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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