GeForce GT 640 DDR3 vs Radeon RX 480

Intro

Compare that to the Radeon RX 480, which features core speeds of 1120 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs as well as 144 TAUs and 32 ROPs.

Display Graphs

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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 480		13349 points
GeForce GT 640 DDR3		1560 points
	Difference: 11789 (756%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 480		150 Watts
	Difference: 85 Watts (131%)

Memory Bandwidth

The Radeon RX 480, in theory, should perform much faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon RX 480		262144 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 205120 (360%)

Texel Rate

The Radeon RX 480 will be much (approximately 460%) faster with regards to AF than the GeForce GT 640 DDR3. (explain)

Radeon RX 480		161280 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 132480 (460%)

Pixel Rate

The Radeon RX 480 should be quite a bit (more or less 149%) more effective at full screen anti-aliasing than the GeForce GT 640 DDR3, and capable of handling higher resolutions while still performing well. (explain)

Radeon RX 480		35840 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 21440 (149%)

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 data (in units of MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.