GeForce GT 640 DDR3 vs Radeon RX 6600

Intro

Compare those specs to the Radeon RX 6600, which has GPU clock speed of 1626 MHz, and 8192 MB of GDDR6 memory running at 1750 MHz through a 128-bit bus. It also features 1792 Stream Processors, 112 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 6600		132 Watts
	Difference: 67 Watts (103%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6600 should in theory be quite a bit better than the GeForce GT 640 DDR3 overall. (explain)

Radeon RX 6600		229376 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 172352 (302%)

Texel Rate

The Radeon RX 6600 will be much (more or less 532%) faster with regards to AF than the GeForce GT 640 DDR3. (explain)

Radeon RX 6600		182112 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 153312 (532%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 6600 is superior to the GeForce GT 640 DDR3, by a large margin. (explain)

Radeon RX 6600		104064 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 89664 (623%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.