GeForce GT 640 DDR3 vs Radeon RX 570

Intro

Compare those specifications to the Radeon RX 570, which has a clock frequency of 1168 MHz and a GDDR5 memory frequency of 1750 MHz. It also uses a 256-bit bus, and makes use of a 14 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 570		12108 points
GeForce GT 640 DDR3		1560 points
	Difference: 10548 (676%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 570		150 Watts
	Difference: 85 Watts (131%)

Memory Bandwidth

As far as performance goes, the Radeon RX 570 should theoretically be quite a bit better than the GeForce GT 640 DDR3 in general. (explain)

Radeon RX 570		229376 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 172352 (302%)

Texel Rate

The Radeon RX 570 is quite a bit (about 419%) faster with regards to AF than the GeForce GT 640 DDR3. (explain)

Radeon RX 570		149504 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 120704 (419%)

Pixel Rate

The Radeon RX 570 should be much (about 160%) better at full screen anti-aliasing than the GeForce GT 640 DDR3, and able to handle higher resolutions better. (explain)

Radeon RX 570		37376 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 22976 (160%)

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 max amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.