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GeForce GT 240 GDDR5 1GB vs Radeon HD 4850 1GB

Intro

The GeForce GT 240 GDDR5 1GB comes with a GPU core clock speed of 550 MHz, and the 1024 MB of GDDR5 memory runs at 850 MHz through a 128-bit bus. It also is comprised of 96 SPUs, 32 TAUs, and 8 ROPs.

Compare those specs to the Radeon HD 4850 1GB, which features a GPU core clock speed of 625 MHz, and 1024 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB 70 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 40 Watts (57%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 1GB should perform a little bit faster than the GeForce GT 240 GDDR5 1GB in general. (explain)

Radeon HD 4850 1GB 63552 MB/sec
GeForce GT 240 GDDR5 1GB 54400 MB/sec
Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 1GB will be quite a bit (about 42%) faster with regards to AF than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
GeForce GT 240 GDDR5 1GB 17600 Mtexels/sec
Difference: 7400 (42%)

Pixel Rate

The Radeon HD 4850 1GB should be a lot (about 127%) faster with regards to AA than the GeForce GT 240 GDDR5 1GB, and also able to handle higher resolutions better. (explain)

Radeon HD 4850 1GB 10000 Mpixels/sec
GeForce GT 240 GDDR5 1GB 4400 Mpixels/sec
Difference: 5600 (127%)

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 1GB

Amazon.com

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Radeon HD 4850 1GB

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 1GB Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year November 2009 Jun 25, 2008
Code Name GT215 RV770 PRO
Memory 1024 MB 1024 MB
Core Speed 550 MHz 625 MHz
Memory Speed 3400 MHz 1986 MHz
Power (Max TDP) 70 watts 110 watts
Bandwidth 54400 MB/sec 63552 MB/sec
Texel Rate 17600 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 96 800(160x5)
Texture Mapping Units 32 40
Render Output Units 8 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 289 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 per second. This number is worked out by multiplying the total number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GT 240 GDDR5 1GB

Amazon.com

Check prices at:

Radeon HD 4850 1GB

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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