GeForce GT 640 DDR3 vs Radeon R7 240

Intro

Compare all that to the Radeon R7 240, which makes use of a 28 nm design. AMD has clocked the core speed at 730 MHz. The DDR3 memory is set to run at a speed of 900 MHz on this specific model. It features 320 SPUs along with 20 Texture Address Units and 8 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

GeForce GT 640 DDR3		1560 points
Radeon R7 240		1218 points
	Difference: 342 (28%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce GT 640 DDR3		65 Watts
	Difference: 35 Watts (117%)

Memory Bandwidth

As far as performance goes, the GeForce GT 640 DDR3 should theoretically be quite a bit better than the Radeon R7 240 in general. (explain)

GeForce GT 640 DDR3		57024 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 28224 (98%)

Texel Rate

The GeForce GT 640 DDR3 is a lot (about 97%) better at anisotropic filtering than the Radeon R7 240. (explain)

GeForce GT 640 DDR3		28800 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 14200 (97%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GT 640 DDR3 is a better choice, by a large margin. (explain)

GeForce GT 640 DDR3		14400 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 8560 (147%)

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 information (in units of MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.