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GeForce GT 240 GDDR5 vs Radeon HD 4830 1GB

Intro

The GeForce GT 240 GDDR5 features a GPU core clock speed of 550 MHz, and the 512 MB of GDDR5 memory runs at 850 MHz through a 128-bit bus. It also features 96 SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the Radeon HD 4830 1GB, which features a GPU core clock speed of 575 MHz, and 1024 MB of GDDR4 memory set to run at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 70 Watts
Radeon HD 4830 1GB 95 Watts
Difference: 25 Watts (36%)

Memory Bandwidth

The Radeon HD 4830 1GB should theoretically perform a little bit faster than the GeForce GT 240 GDDR5 in general. (explain)

Radeon HD 4830 1GB 57600 MB/sec
GeForce GT 240 GDDR5 54400 MB/sec
Difference: 3200 (6%)

Texel Rate

The Radeon HD 4830 1GB is a small bit (more or less 5%) more effective at AF than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4830 1GB 18400 Mtexels/sec
GeForce GT 240 GDDR5 17600 Mtexels/sec
Difference: 800 (5%)

Pixel Rate

The Radeon HD 4830 1GB should be much (approximately 109%) faster with regards to full screen anti-aliasing than the GeForce GT 240 GDDR5, and also capable of handling higher resolutions while still performing well. (explain)

Radeon HD 4830 1GB 9200 Mpixels/sec
GeForce GT 240 GDDR5 4400 Mpixels/sec
Difference: 4800 (109%)

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 4830 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.

Specifications

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Model GeForce GT 240 GDDR5 Radeon HD 4830 1GB
Manufacturer nVidia AMD
Year Novermber 2009 Oct 21, 2008
Code Name GT215 RV770 LE
Memory 512 MB 1024 MB
Core Speed 550 MHz 575 MHz
Memory Speed 3400 MHz 1800 MHz
Power (Max TDP) 70 watts 95 watts
Bandwidth 54400 MB/sec 57600 MB/sec
Texel Rate 17600 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 96 640(128x5)
Texture Mapping Units 32 32
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: Bandwidth is the max amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines 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 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

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GeForce GT 240 GDDR5

Amazon.com

Check prices at:

Radeon HD 4830 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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