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GeForce GTS 250 512MB vs Radeon HD 4830 512MB

Intro

The GeForce GTS 250 512MB has clock speeds of 738 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 4830 512MB, which has a core clock speed of 575 MHz and a GDDR3 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

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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

The GeForce GTS 250 512MB should theoretically perform much faster than the Radeon HD 4830 512MB overall. (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 is much (approximately 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 running with a high screen resolution is important to you, then the GeForce GTS 250 512MB is superior to the Radeon HD 4830 512MB, 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

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.

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 maximum amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to 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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