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Radeon HD 4870 X2 vs Radeon RX 6600

Intro

The Radeon HD 4870 X2 has clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon RX 6600, which comes with GPU core speed of 1626 MHz, and 8192 MB of GDDR6 RAM running at 1750 MHz through a 128-bit bus. It also is made up of 1792 SPUs, 112 Texture Address Units, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 132 Watts
Radeon HD 4870 X2 350 Watts
Difference: 218 Watts (165%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 will be 0% quicker than the Radeon RX 6600 overall, because of its greater data rate. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon RX 6600 229376 MB/sec
Difference: 1024 (0%)

Texel Rate

The Radeon RX 6600 should be much (more or less 204%) better at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 6600 182112 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 122112 (204%)

Pixel Rate

The Radeon RX 6600 will be quite a bit (approximately 334%) better at FSAA than the Radeon HD 4870 X2, and able to handle higher screen resolutions better. (explain)

Radeon RX 6600 104064 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 80064 (334%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 6600

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 4870 X2 Radeon RX 6600
Manufacturer AMD AMD
Year Aug 12, 2008 October 2021
Code Name R700 Navi 23
Memory 1024 MB (x2) 8192 MB
Core Speed 750 MHz (x2) 1626 MHz
Memory Speed 3600 MHz (x2) 3500 GB/s
Power (Max TDP) 350 watts 132 watts
Bandwidth 230400 MB/sec 229376 MB/sec
Texel Rate 60000 Mtexels/sec 182112 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 104064 Mpixels/sec
Unified Shaders 800(160x5) (x2) 1792
Texture Mapping Units 40 (x2) 112
Render Output Units 16 (x2) 64
Bus Type GDDR5 GDDR6
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 7 nm
Transistors 956 million 11060 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 4.0 x16
DirectX Version DirectX 10.1 DirectX 12
OpenGL Version OpenGL 3.0 OpenGL 4.6

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units 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 applied per second.

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

Display Prices

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 6600

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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