GeForce GT 640 DDR3 vs Nvidia Titan Xp

Intro

Compare those specifications to the Nvidia Titan Xp, which makes use of a 16 nm design. nVidia has set the core frequency at 1582 MHz. The GDDR5X memory runs at a frequency of 1426 MHz on this particular model. It features 3840 SPUs along with 240 TAUs and 96 ROPs.

Display Graphs

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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

Nvidia Titan Xp		27938 points
GeForce GT 640 DDR3		1560 points
	Difference: 26378 (1691%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Nvidia Titan Xp		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

As far as performance goes, the Nvidia Titan Xp should in theory be quite a bit superior to the GeForce GT 640 DDR3 in general. (explain)

Nvidia Titan Xp		560845 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 503821 (884%)

Texel Rate

The Nvidia Titan Xp is a lot (about 1218%) better at AF than the GeForce GT 640 DDR3. (explain)

Nvidia Titan Xp		379680 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 350880 (1218%)

Pixel Rate

The Nvidia Titan Xp will be quite a bit (approximately 955%) faster with regards to FSAA than the GeForce GT 640 DDR3, and capable of handling higher screen resolutions without losing too much performance. (explain)

Nvidia Titan Xp		151872 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 137472 (955%)

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 max amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher 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 most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.