GeForce GT 640 DDR3 vs GeForce GTX Titan X

Intro

Compare that to the GeForce GTX Titan X, which features GPU core speed of 1000 MHz, and 12288 MB of GDDR5 RAM set to run at 1750 MHz through a 384-bit bus. It also is made up of 3072 Stream Processors, 192 Texture Address Units, and 96 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 GTX Titan X		17879 points
GeForce GT 640 DDR3		1560 points
	Difference: 16319 (1046%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce GTX Titan X		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

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

GeForce GTX Titan X		336000 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 278976 (489%)

Texel Rate

The GeForce GTX Titan X will be much (more or less 567%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

GeForce GTX Titan X		192000 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 163200 (567%)

Pixel Rate

The GeForce GTX Titan X should be much (approximately 567%) more effective at full screen anti-aliasing than the GeForce GT 640 DDR3, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX Titan X		96000 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 81600 (567%)

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 maximum amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses 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 processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video 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 that the graphics chip can 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 ROPs by the the core clock speed. 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 many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.