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 speed of 1250 MHz. It also makes use of a 512-bit bus, and uses a 28 nm design. It features 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 overall. (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 (approximately 389%) better at AF 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 using a high resolution is important to you, then the Radeon R9 290X is the winner, 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: Bandwidth is the maximum amount of data (counted in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 are processed per second. This number is worked out by multiplying the total amount of 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on 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 reach the max fill rate.