GeForce GT 640 DDR3 vs Radeon R9 290X

Intro

Compare all of that to the Radeon R9 290X, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 512-bit bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 Texture Address Units, and 64 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 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

Theoretically speaking, 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 a lot (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

If running with high levels of AA is important to you, then the Radeon R9 290X is a better choice, and very much so. (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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.