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GeForce GTS 450 1GB vs Radeon HD 4830 1GB

Intro

The GeForce GTS 450 1GB features a core clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare that to the Radeon HD 4830 1GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 575 MHz. The GDDR4 RAM works at a frequency of 900 MHz on this card. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB 95 Watts
GeForce GTS 450 1GB 106 Watts
Difference: 11 Watts (12%)

Memory Bandwidth

The GeForce GTS 450 1GB, in theory, should be a small bit faster than the Radeon HD 4830 1GB overall. (explain)

GeForce GTS 450 1GB 57728 MB/sec
Radeon HD 4830 1GB 57600 MB/sec
Difference: 128 (0%)

Texel Rate

The GeForce GTS 450 1GB should be quite a bit (about 36%) more effective at AF than the Radeon HD 4830 1GB. (explain)

GeForce GTS 450 1GB 25056 Mtexels/sec
Radeon HD 4830 1GB 18400 Mtexels/sec
Difference: 6656 (36%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTS 450 1GB is superior to the Radeon HD 4830 1GB, by far. (explain)

GeForce GTS 450 1GB 12528 Mpixels/sec
Radeon HD 4830 1GB 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 1GB

Amazon.com

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Radeon HD 4830 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 GTS 450 1GB Radeon HD 4830 1GB
Manufacturer nVidia AMD
Year September 2010 Oct 21, 2008
Code Name GF106 RV770 LE
Memory 1024 MB 1024 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 GDDR4
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 largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTS 450 1GB

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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