Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

GeForce GT 240 GDDR5 1GB vs GeForce GT 640 DDR3

Intro

The GeForce GT 240 GDDR5 1GB has a GPU core clock speed of 550 MHz, and the 1024 MB of GDDR5 memory is set to run at 850 MHz through a 128-bit bus. It also is made up of 96 Stream Processors, 32 Texture Address Units, and 8 ROPs.

Compare those specifications to the GeForce GT 640 DDR3, which uses a 28 nm design. nVidia has set the core speed at 900 MHz. The DDR3 RAM works at a speed of 1782 MHz on this particular model. It features 384 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3 65 Watts
GeForce GT 240 GDDR5 1GB 70 Watts
Difference: 5 Watts (8%)

Memory Bandwidth

Theoretically, the GeForce GT 640 DDR3 should perform a little bit faster than the GeForce GT 240 GDDR5 1GB overall. (explain)

GeForce GT 640 DDR3 57024 MB/sec
GeForce GT 240 GDDR5 1GB 54400 MB/sec
Difference: 2624 (5%)

Texel Rate

The GeForce GT 640 DDR3 will be a lot (more or less 64%) better at anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
GeForce GT 240 GDDR5 1GB 17600 Mtexels/sec
Difference: 11200 (64%)

Pixel Rate

The GeForce GT 640 DDR3 will be much (approximately 227%) more effective at FSAA than the GeForce GT 240 GDDR5 1GB, and should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
GeForce GT 240 GDDR5 1GB 4400 Mpixels/sec
Difference: 10000 (227%)

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

Display Prices

Hide Prices

GeForce GT 240 GDDR5 1GB

Amazon.com

Check prices at:

GeForce GT 640 DDR3

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Display Specifications

Hide Specifications

Model GeForce GT 240 GDDR5 1GB GeForce GT 640 DDR3
Manufacturer nVidia nVidia
Year November 2009 June 2012
Code Name GT215 GK107
Memory 1024 MB 2048 MB
Core Speed 550 MHz 900 MHz
Memory Speed 3400 MHz 3564 MHz
Power (Max TDP) 70 watts 65 watts
Bandwidth 54400 MB/sec 57024 MB/sec
Texel Rate 17600 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 96 384
Texture Mapping Units 32 32
Render Output Units 8 16
Bus Type GDDR5 DDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 289 million 1300 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.0
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GT 240 GDDR5 1GB

Amazon.com

Check prices at:

GeForce GT 640 DDR3

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield