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GeForce GTS 450 1GB vs Radeon HD 4830 1GB

Intro

The GeForce GTS 450 1GB features a GPU core speed of 783 MHz, and the 1024 MB of GDDR5 RAM runs at 902 MHz through a 128-bit bus. It also features 192 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 4830 1GB, which comes with a core clock frequency of 575 MHz and a GDDR4 memory speed of 900 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation 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

As far as performance goes, the GeForce GTS 450 1GB should theoretically be a bit better 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 will be quite a bit (about 36%) better at texture filtering 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

The GeForce GTS 450 1GB should be a lot (more or less 36%) more effective at FSAA than the Radeon HD 4830 1GB, and also will be capable of handling higher resolutions better. (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

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 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: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

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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