GeForce GT 640 DDR3 vs Radeon R9 290X

Intro

Compare those specs to the Radeon R9 290X, which has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2816 SPUs as well as 176 Texture Address Units and 64 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 290X		10609 points
GeForce GT 640 DDR3		1560 points
	Difference: 9049 (580%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon R9 290X		300 Watts
	Difference: 235 Watts (362%)

Memory Bandwidth

In theory, the Radeon R9 290X should perform quite a bit faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon R9 290X		320000 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 262976 (461%)

Texel Rate

The Radeon R9 290X is quite a bit (about 389%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon R9 290X		140800 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 112000 (389%)

Pixel Rate

The Radeon R9 290X should be a lot (about 256%) better at FSAA than the GeForce GT 640 DDR3, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 290X		51200 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 36800 (256%)

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 MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 are processed per second. This is calculated by multiplying the total number of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.