GeForce GT 640 DDR3 vs GeForce GTX 560 Ti 448

Intro

Compare all that to the GeForce GTX 560 Ti 448, which features a core clock speed of 732 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 320-bit bus, and makes use of a 40 nm design. It is made up of 448 SPUs, 56 Texture Address Units, and 40 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 560 Ti 448		4200 points
GeForce GT 640 DDR3		1560 points
	Difference: 2640 (169%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 145 Watts (223%)

Memory Bandwidth

In theory, the GeForce GTX 560 Ti 448 should perform much faster than the GeForce GT 640 DDR3 overall. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 86976 (153%)

Texel Rate

The GeForce GTX 560 Ti 448 is quite a bit (about 42%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 12192 (42%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 560 Ti 448 is a better choice, and very much so. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 14880 (103%)

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 data (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. 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 of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.