GeForce GT 640 DDR3 vs Radeon RX 570

Intro

Compare those specifications to the Radeon RX 570, which has a core clock frequency of 1168 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

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

The Radeon RX 570 should theoretically perform much faster than the GeForce GT 640 DDR3 overall. (explain)

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

Texel Rate

The Radeon RX 570 will be much (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

If running with lots of anti-aliasing is important to you, then the Radeon RX 570 is a better choice, by far. (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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video 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 maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.