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GeForce 8600 GT 512MB DDR2 vs Radeon RX 6600

Intro

The GeForce 8600 GT 512MB DDR2 has a GPU core clock speed of 540 MHz, and the 512 MB of DDR2 memory is set to run at 400 MHz through a 128-bit bus. It also is comprised of 32 Stream Processors, 16 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the Radeon RX 6600, which has a core clock speed of 1626 MHz and a GDDR6 memory frequency of 1750 MHz. It also makes use of a 128-bit memory bus, and makes use of a 7 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2		47 Watts
Radeon RX 6600		132 Watts
	Difference: 85 Watts (181%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6600 should be 1692% faster than the GeForce 8600 GT 512MB DDR2 in general, due to its higher bandwidth. (explain)

Radeon RX 6600		229376 MB/sec
GeForce 8600 GT 512MB DDR2		12800 MB/sec
	Difference: 216576 (1692%)

Texel Rate

The Radeon RX 6600 should be much (approximately 2008%) faster with regards to texture filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon RX 6600		182112 Mtexels/sec
GeForce 8600 GT 512MB DDR2		8640 Mtexels/sec
	Difference: 173472 (2008%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6600 is superior to the GeForce 8600 GT 512MB DDR2, by a large margin. (explain)

Radeon RX 6600		104064 Mpixels/sec
GeForce 8600 GT 512MB DDR2		4320 Mpixels/sec
	Difference: 99744 (2309%)

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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GeForce 8600 GT 512MB DDR2

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Radeon RX 6600

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Specifications

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Model	GeForce 8600 GT 512MB DDR2	Radeon RX 6600
Manufacturer	nVidia	AMD
Year	April 2007	October 2021
Code Name	G84	Navi 23
Memory	512 MB	8192 MB
Core Speed	540 MHz	1626 MHz
Memory Speed	800 MHz	3500 GB/s
Power (Max TDP)	47 watts	132 watts
Bandwidth	12800 MB/sec	229376 MB/sec
Texel Rate	8640 Mtexels/sec	182112 Mtexels/sec
Pixel Rate	4320 Mpixels/sec	104064 Mpixels/sec
Unified Shaders	32	1792
Texture Mapping Units	16	112
Render Output Units	8	64
Bus Type	DDR2	GDDR6
Bus Width	128-bit	128-bit
Fab Process	80 nm	7 nm
Transistors	289 million	11060 million
Bus	PCIe x16	PCIe 4.0 x16
DirectX Version	DirectX 10	DirectX 12
OpenGL Version	OpenGL 3.0	OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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