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Radeon R9 390 8G vs Radeon RX 6750 XT

Intro

The Radeon R9 390 8G comes with core speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2560 SPUs as well as 160 TAUs and 64 ROPs.

Compare those specs to the Radeon RX 6750 XT, which comes with clock speeds of 2150 MHz on the GPU, and 2250 MHz on the 12288 MB of GDDR6 RAM. It features 2560 SPUs as well as 160 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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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

As far as performance goes, the Radeon RX 6750 XT should in theory be just 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 is a lot (approximately 115%) better at AF 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

If using high levels of AA is important to you, then the Radeon RX 6750 XT is a better choice, by a large margin. (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 maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must 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 anti-aliasing, High Dynamic Range and higher screen 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 better the texel rate, the better the video 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 record 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 speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max 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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