GeForce GT 640 DDR3 vs GeForce GTX Titan Black

Intro

Compare those specifications to the GeForce GTX Titan Black, which comes with a clock frequency of 889 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 384-bit bus, and uses a 28 nm design. It is made up of 2880 SPUs, 240 TAUs, and 48 Raster Operation Units.

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 Black		11666 points
GeForce GT 640 DDR3		1560 points
	Difference: 10106 (648%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

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

Texel Rate

The GeForce GTX Titan Black will be quite a bit (approximately 641%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 184560 (641%)

Pixel Rate

The GeForce GTX Titan Black is a lot (approximately 196%) faster with regards to FSAA than the GeForce GT 640 DDR3, and also should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 28272 (196%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes 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.