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GeForce GT 240 GDDR5 vs Radeon HD 7850

Intro

The GeForce GT 240 GDDR5 makes use of a 40 nm design. nVidia has set the core speed at 550 MHz. The GDDR5 RAM works at a frequency of 850 MHz on this particular card. It features 96 SPUs as well as 32 Texture Address Units and 8 ROPs.

Compare all that to the Radeon HD 7850, which features a clock frequency of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It features 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 70 Watts
Radeon HD 7850 130 Watts
Difference: 60 Watts (86%)

Memory Bandwidth

The Radeon HD 7850 should in theory be much faster than the GeForce GT 240 GDDR5 in general. (explain)

Radeon HD 7850 153600 MB/sec
GeForce GT 240 GDDR5 54400 MB/sec
Difference: 99200 (182%)

Texel Rate

The Radeon HD 7850 should be a lot (more or less 213%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GT 240 GDDR5 17600 Mtexels/sec
Difference: 37440 (213%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7850 is the winner, and very much so. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GT 240 GDDR5 4400 Mpixels/sec
Difference: 23120 (525%)

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

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GeForce GT 240 GDDR5

Amazon.com

Check prices at:

Radeon HD 7850

Amazon.com

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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

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Model GeForce GT 240 GDDR5 Radeon HD 7850
Manufacturer nVidia AMD
Year Novermber 2009 March 2012
Code Name GT215 Pitcairn Pro
Memory 512 MB 2048 MB
Core Speed 550 MHz 860 MHz
Memory Speed 3400 MHz 4800 MHz
Power (Max TDP) 70 watts 130 watts
Bandwidth 54400 MB/sec 153600 MB/sec
Texel Rate 17600 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 96 1024
Texture Mapping Units 32 64
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 289 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GT 240 GDDR5

Amazon.com

Check prices at:

Radeon HD 7850

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.

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