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Radeon R9 390 8G vs Radeon RX 6750 XT

Intro

The Radeon R9 390 8G comes with a GPU core clock speed of 1000 MHz, and the 8192 MB of GDDR5 memory runs at 1500 MHz through a 512-bit bus. It also is comprised of 2560 Stream Processors, 160 Texture Address Units, and 64 ROPs.

Compare all that to the Radeon RX 6750 XT, which comes with a GPU core clock speed of 2150 MHz, and 12288 MB of GDDR6 memory running at 2250 MHz through a 192-bit bus. It also features 2560 SPUs, 160 Texture Address Units, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6750 XT 250 Watts
Radeon R9 390 8G 275 Watts
Difference: 25 Watts (10%)

Memory Bandwidth

Performance-wise, the Radeon RX 6750 XT should theoretically be a bit superior to the Radeon R9 390 8G in general. (explain)

Radeon RX 6750 XT 442368 MB/sec
Radeon R9 390 8G 384000 MB/sec
Difference: 58368 (15%)

Texel Rate

The Radeon RX 6750 XT should be a lot (approximately 115%) faster with regards to anisotropic filtering than the Radeon R9 390 8G. (explain)

Radeon RX 6750 XT 344000 Mtexels/sec
Radeon R9 390 8G 160000 Mtexels/sec
Difference: 184000 (115%)

Pixel Rate

The Radeon RX 6750 XT should be much (approximately 115%) faster with regards to anti-aliasing than the Radeon R9 390 8G, and also will be capable of handling higher screen resolutions better. (explain)

Radeon RX 6750 XT 137600 Mpixels/sec
Radeon R9 390 8G 64000 Mpixels/sec
Difference: 73600 (115%)

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 390 8G

Amazon.com

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Radeon RX 6750 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 390 8G Radeon RX 6750 XT
Manufacturer AMD AMD
Year June 2015 March 2022
Code Name Grenada PRO Navi 22
Memory 8192 MB 12288 MB
Core Speed 1000 MHz 2150 MHz
Memory Speed 6000 MHz 4500 GB/s
Power (Max TDP) 275 watts 250 watts
Bandwidth 384000 MB/sec 442368 MB/sec
Texel Rate 160000 Mtexels/sec 344000 Mtexels/sec
Pixel Rate 64000 Mpixels/sec 137600 Mpixels/sec
Unified Shaders 2560 2560
Texture Mapping Units 160 160
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: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. It 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 ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 maximum fill rate.

Display Prices

Hide Prices

Radeon R9 390 8G

Amazon.com

Check prices at:

Radeon RX 6750 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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