GeForce GT 640 DDR3 vs GeForce GTX 480

Intro

Compare that to the GeForce GTX 480, which features core speeds of 700 MHz on the GPU, and 924 MHz on the 1536 MB of GDDR5 memory. It features 480 SPUs as well as 60 TAUs and 48 Rasterization Operator 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 480		3650 points
GeForce GT 640 DDR3		1560 points
	Difference: 2090 (134%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce GTX 480		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

Performance-wise, the GeForce GTX 480 should in theory be quite a bit better than the GeForce GT 640 DDR3 in general. (explain)

GeForce GTX 480		177408 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 120384 (211%)

Texel Rate

The GeForce GTX 480 is much (about 46%) better at AF than the GeForce GT 640 DDR3. (explain)

GeForce GTX 480		42000 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 13200 (46%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 480 is a better choice, by far. (explain)

GeForce GTX 480		33600 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 19200 (133%)

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 max amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied in one 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock 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 output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.