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GeForce GTS 450 vs Radeon HD 4830 512MB

Intro

The GeForce GTS 450 comes with a core clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also features a 128-bit bus, and uses a 40 nm design. It features 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 4830 512MB, which makes use of a 55 nm design. AMD has set the core speed at 575 MHz. The GDDR3 memory runs at a speed of 900 MHz on this specific card. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
GeForce GTS 450 106 Watts
Difference: 11 Watts (12%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 should be 0% faster than the Radeon HD 4830 512MB in general, because of its greater bandwidth. (explain)

GeForce GTS 450 57728 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 128 (0%)

Texel Rate

The GeForce GTS 450 should be much (approximately 36%) more effective at anisotropic filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 6656 (36%)

Pixel Rate

The GeForce GTS 450 is quite a bit (more or less 36%) better at full screen anti-aliasing than the Radeon HD 4830 512MB, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 3328 (36%)

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 450

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 450 Radeon HD 4830 512MB
Manufacturer nVidia AMD
Year September 2010 Oct 21, 2008
Code Name GF106 RV770 LE
Memory 512 MB 512 MB
Core Speed 783 MHz 575 MHz
Memory Speed 3608 MHz 1800 MHz
Power (Max TDP) 106 watts 95 watts
Bandwidth 57728 MB/sec 57600 MB/sec
Texel Rate 25056 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 192 640(128x5)
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs 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 also depends on many 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

Hide Prices

GeForce GTS 450

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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