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GeForce GT 430 vs Radeon HD 6450 (OEM) 1GB

Intro

The GeForce GT 430 has a GPU core clock speed of 700 MHz, and the 512 MB of GDDR3 RAM is set to run at 900 MHz through a 128-bit bus. It also features 96 SPUs, 16 TAUs, and 4 ROPs.

Compare all of that to the Radeon HD 6450 (OEM) 1GB, which comes with a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory running at 900 MHz through a 64-bit bus. It also features 160 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
GeForce GT 430 60 Watts
Difference: 29 Watts (94%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The GeForce GT 430 should be quite a bit (approximately 87%) faster with regards to texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

GeForce GT 430 11200 Mtexels/sec
Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Difference: 5200 (87%)

Pixel Rate

The Radeon HD 6450 (OEM) 1GB will be a bit (about 7%) faster with regards to anti-aliasing than the GeForce GT 430, and also able to handle higher screen resolutions better. (explain)

Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
GeForce GT 430 2800 Mpixels/sec
Difference: 200 (7%)

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

GeForce GT 430

Radeon HD 6450 (OEM) 1GB

Specifications

Display Specifications

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Model GeForce GT 430 Radeon HD 6450 (OEM) 1GB
Manufacturer nVidia AMD
Year October 2010 February 2011
Code Name GF108 Caicos
Memory 512 MB 1024 MB
Core Speed 700 MHz 750 MHz
Memory Speed 1800 MHz 3600 MHz
Power (Max TDP) 60 watts 31 watts
Bandwidth 28800 MB/sec 28800 MB/sec
Texel Rate 11200 Mtexels/sec 6000 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 3000 Mpixels/sec
Unified Shaders 96 160
Texture Mapping Units 16 8
Render Output Units 4 4
Bus Type GDDR3 GDDR5
Bus Width 128-bit 64-bit
Fab Process 40 nm 40 nm
Transistors 585 million 370 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, 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 maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

GeForce GT 430

Radeon HD 6450 (OEM) 1GB

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