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Radeon HD 6950 vs Radeon R9 390 8G

Intro

The Radeon HD 6950 features core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 1408 SPUs along with 88 Texture Address Units and 32 ROPs.

Compare that to the Radeon R9 390 8G, which has a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 512-bit memory bus, and uses a 28 nm design. It features 2560 SPUs, 160 Texture Address Units, and 64 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 390 8G 12733 points
Radeon HD 6950 3240 points
Difference: 9493 (293%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 200 Watts
Radeon R9 390 8G 275 Watts
Difference: 75 Watts (38%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G is 140% quicker than the Radeon HD 6950 overall, due to its higher data rate. (explain)

Radeon R9 390 8G 384000 MB/sec
Radeon HD 6950 160000 MB/sec
Difference: 224000 (140%)

Texel Rate

The Radeon R9 390 8G should be much (about 127%) better at texture filtering than the Radeon HD 6950. (explain)

Radeon R9 390 8G 160000 Mtexels/sec
Radeon HD 6950 70400 Mtexels/sec
Difference: 89600 (127%)

Pixel Rate

The Radeon R9 390 8G should be much (about 150%) better at full screen anti-aliasing than the Radeon HD 6950, and also should be capable of handling higher screen resolutions better. (explain)

Radeon R9 390 8G 64000 Mpixels/sec
Radeon HD 6950 25600 Mpixels/sec
Difference: 38400 (150%)

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 HD 6950

Amazon.com

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Radeon R9 390 8G

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 HD 6950 Radeon R9 390 8G
Manufacturer AMD AMD
Year December 2010 June 2015
Code Name Cayman Pro Grenada PRO
Memory 1024 MB 8192 MB
Core Speed 800 MHz 1000 MHz
Memory Speed 5000 MHz 6000 MHz
Power (Max TDP) 200 watts 275 watts
Bandwidth 160000 MB/sec 384000 MB/sec
Texel Rate 70400 Mtexels/sec 160000 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 1408 2560
Texture Mapping Units 88 160
Render Output Units 32 64
Bus Type GDDR5 GDDR5
Bus Width 256-bit 512-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 6200 million
Bus PCIe x16 PCIe 3.0 ×16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 6950

Amazon.com

Check prices at:

Radeon R9 390 8G

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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