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Radeon HD 7950 3GB vs Radeon RX 480 4GB

Intro

The Radeon HD 7950 3GB features core speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon RX 480 4GB, which features a core clock speed of 1120 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is comprised of 2304 SPUs, 144 Texture Address Units, and 32 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.

Zcash Mining Hash Rate

Radeon RX 480 4GB 267 Sol/s
Radeon HD 7950 3GB 229 Sol/s
Difference: 38 (17%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB 150 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 50 Watts (33%)

Memory Bandwidth

Performance-wise, the Radeon HD 7950 3GB should in theory be a small bit superior to the Radeon RX 480 4GB in general. (explain)

Radeon HD 7950 3GB 240000 MB/sec
Radeon RX 480 4GB 229376 MB/sec
Difference: 10624 (5%)

Texel Rate

The Radeon RX 480 4GB should be quite a bit (approximately 80%) faster with regards to anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 480 4GB 161280 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 71680 (80%)

Pixel Rate

The Radeon RX 480 4GB should be a lot (about 40%) more effective at FSAA than the Radeon HD 7950 3GB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 480 4GB 35840 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 10240 (40%)

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 7950 3GB

Amazon.com

Radeon RX 480 4GB

Amazon.com

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 7950 3GB Radeon RX 480 4GB
Manufacturer AMD AMD
Year January 2012 June 2016
Code Name Tahiti Pro Polaris 10
Memory 3072 MB 4096 MB
Core Speed 800 MHz 1120 MHz
Memory Speed 5000 MHz 7000 MHz
Power (Max TDP) 200 watts 150 watts
Bandwidth 240000 MB/sec 229376 MB/sec
Texel Rate 89600 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 1792 2304
Texture Mapping Units 112 144
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 7950 3GB

Amazon.com

Radeon RX 480 4GB

Amazon.com

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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