GeForce GT 640 DDR3 vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which makes use of a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 RAM is set to run at a speed of 1425 MHz on this card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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 R9 380 2G		8850 points
GeForce GT 640 DDR3		1560 points
	Difference: 7290 (467%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon R9 380 2G		190 Watts
	Difference: 125 Watts (192%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G should be quite a bit faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 125376 (220%)

Texel Rate

The Radeon R9 380 2G is quite a bit (more or less 277%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 79840 (277%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 380 2G is a better choice, and very much so. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 16640 (116%)

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 max amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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