GeForce GT 640 DDR3 vs Radeon RX 5500

Intro

Compare that to the Radeon RX 5500, which features a clock speed of 1670 MHz and a GDDR6 memory speed of 1750 MHz. It also makes use of a 128-bit memory bus, and uses a 7 nm design. It features 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 5500		150 Watts
	Difference: 85 Watts (131%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5500 will be 302% faster than the GeForce GT 640 DDR3 in general, because of its higher bandwidth. (explain)

Radeon RX 5500		229376 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 172352 (302%)

Texel Rate

The Radeon RX 5500 should be quite a bit (more or less 410%) better at anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX 5500		146960 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 118160 (410%)

Pixel Rate

The Radeon RX 5500 is quite a bit (more or less 271%) faster with regards to FSAA than the GeForce GT 640 DDR3, and will be capable of handling higher resolutions more effectively. (explain)

Radeon RX 5500		53440 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 39040 (271%)

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.