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Radeon R9 390X 8G vs Radeon RX 6700 XT

Intro

The Radeon R9 390X 8G has a GPU core clock speed of 1050 MHz, and the 8192 MB of GDDR5 RAM runs at 1500 MHz through a 512-bit bus. It also is comprised of 2816 SPUs, 176 Texture Address Units, and 64 ROPs.

Compare those specs to the Radeon RX 6700 XT, which makes use of a 7 nm design. AMD has clocked the core speed at 2321 MHz. The GDDR6 RAM runs at a frequency of 2000 MHz on this specific card. It features 2560 SPUs along with 160 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6700 XT 230 Watts
Radeon R9 390X 8G 275 Watts
Difference: 45 Watts (20%)

Memory Bandwidth

The Radeon RX 6700 XT, in theory, should perform a little bit faster than the Radeon R9 390X 8G in general. (explain)

Radeon RX 6700 XT 393216 MB/sec
Radeon R9 390X 8G 384000 MB/sec
Difference: 9216 (2%)

Texel Rate

The Radeon RX 6700 XT is much (approximately 101%) better at texture filtering than the Radeon R9 390X 8G. (explain)

Radeon RX 6700 XT 371360 Mtexels/sec
Radeon R9 390X 8G 184800 Mtexels/sec
Difference: 186560 (101%)

Pixel Rate

The Radeon RX 6700 XT should be a lot (more or less 121%) more effective at FSAA than the Radeon R9 390X 8G, and able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 6700 XT 148544 Mpixels/sec
Radeon R9 390X 8G 67200 Mpixels/sec
Difference: 81344 (121%)

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 390X 8G

Amazon.com

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Radeon RX 6700 XT

Amazon.com

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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 390X 8G Radeon RX 6700 XT
Manufacturer AMD AMD
Year June 2015 March 2021
Code Name Grenada XT Navi 22
Memory 8192 MB (Unknown) MB
Core Speed 1050 MHz 2321 MHz
Memory Speed 6000 MHz 4000 GB/s
Power (Max TDP) 275 watts 230 watts
Bandwidth 384000 MB/sec 393216 MB/sec
Texel Rate 184800 Mtexels/sec 371360 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 148544 Mpixels/sec
Unified Shaders 2816 2560
Texture Mapping Units 176 160
Render Output Units 64 64
Bus Type GDDR5 GDDR6
Bus Width 512-bit 192-bit
Fab Process 28 nm 7 nm
Transistors 6200 million 17200 million
Bus PCIe 3.0 ×16 PCIe 4.0 x16
DirectX Version DirectX 12.0 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.6

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, 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 most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon R9 390X 8G

Amazon.com

Check prices at:

Radeon RX 6700 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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