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


Intro

The GeForce GT 430 has a clock speed of 700 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 96 SPUs, 16 TAUs, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which comes with core speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 160 SPUs as well as 8 Texture Address Units 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 bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The GeForce GT 430 is a lot (about 87%) faster with regards to AF 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

If using high levels of AA is important to you, then the Radeon HD 6450 (OEM) 1GB is the winner, but only just. (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: Bandwidth is the largest amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 output 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 reach the maximum fill rate.

GeForce GT 430

Radeon HD 6450 (OEM) 1GB

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