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Radeon HD 7950 3GB vs Radeon RX 6650 XT

Intro

The Radeon HD 7950 3GB has a GPU core clock speed of 800 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1250 MHz through a 384-bit bus. It also features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare that to the Radeon RX 6650 XT, which features a clock speed of 2055 MHz and a GDDR6 memory speed of 2190 MHz. It also uses a 128-bit memory bus, and makes use of a 7 nm design. It is made up of 2048 SPUs, 128 TAUs, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT 176 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 24 Watts (14%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6650 XT should in theory be a bit better than the Radeon HD 7950 3GB overall. (explain)

Radeon RX 6650 XT 287072 MB/sec
Radeon HD 7950 3GB 240000 MB/sec
Difference: 47072 (20%)

Texel Rate

The Radeon RX 6650 XT should be a lot (more or less 194%) faster with regards to texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 173440 (194%)

Pixel Rate

The Radeon RX 6650 XT should be much (about 414%) more effective at anti-aliasing than the Radeon HD 7950 3GB, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 105920 (414%)

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

Check prices at:

Radeon RX 6650 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.

Specifications

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Model Radeon HD 7950 3GB Radeon RX 6650 XT
Manufacturer AMD AMD
Year January 2012 May 2022
Code Name Tahiti Pro Navi 23
Memory 3072 MB 8192 MB
Core Speed 800 MHz 2055 MHz
Memory Speed 5000 MHz 4380 GB/s
Power (Max TDP) 200 watts 176 watts
Bandwidth 240000 MB/sec 287072 MB/sec
Texel Rate 89600 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 131520 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 64
Bus Type GDDR5 GDDR6
Bus Width 384-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 4313 million 11060 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.2 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 applied per second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. 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 many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7950 3GB

Amazon.com

Check prices at:

Radeon RX 6650 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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