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GeForce GTS 250 512MB vs Radeon HD 4830 512MB

Intro

The GeForce GTS 250 512MB features a GPU clock speed of 738 MHz, and the 512 MB of GDDR3 memory runs at 1100 MHz through a 256-bit bus. It also features 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 4830 512MB, which comes with GPU clock speed of 575 MHz, and 512 MB of GDDR3 RAM set to run at 900 MHz through a 256-bit bus. It also features 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
GeForce GTS 250 512MB 145 Watts
Difference: 50 Watts (53%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 250 512MB is 22% faster than the Radeon HD 4830 512MB overall, because of its greater data rate. (explain)

GeForce GTS 250 512MB 70400 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 12800 (22%)

Texel Rate

The GeForce GTS 250 512MB should be quite a bit (more or less 157%) better at AF than the Radeon HD 4830 512MB. (explain)

GeForce GTS 250 512MB 47232 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 28832 (157%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTS 250 512MB is the winner, and very much so. (explain)

GeForce GTS 250 512MB 11808 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 2608 (28%)

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 GTS 250 512MB

Amazon.com

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Radeon HD 4830 512MB

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 GTS 250 512MB Radeon HD 4830 512MB
Manufacturer nVidia AMD
Year March 3, 2009 Oct 21, 2008
Code Name G92a/b RV770 LE
Memory 512 MB 512 MB
Core Speed 738 MHz 575 MHz
Memory Speed 2200 MHz 1800 MHz
Power (Max TDP) 145 watts 95 watts
Bandwidth 70400 MB/sec 57600 MB/sec
Texel Rate 47232 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 128 640(128x5)
Texture Mapping Units 64 32
Render Output Units 16 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit
Fab Process 65/55 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTS 250 512MB

Amazon.com

Check prices at:

Radeon HD 4830 512MB

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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