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

Intro

The GeForce GT 430 has core clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 96 SPUs along with 16 Texture Address Units and 4 ROPs.

Compare that to the Radeon HD 6450 (OEM) 1GB, which has a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It features 160 SPUs, 8 Texture Address Units, and 4 ROPs.

(No game benchmarks for this combination yet.)

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 exactly the same bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The GeForce GT 430 will be a lot (approximately 87%) better at 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

If using a high resolution is important to you, then the Radeon HD 6450 (OEM) 1GB is the winner, though only just barely. (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

Amazon.com

Radeon HD 6450 (OEM) 1GB

Amazon.com

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

Model GeForce GT 430 Radeon HD 6450 (OEM) 1GB
Manufacturer nVidia AMD
Year October 2010 February 2011
Code Name GF108 Caicos
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe 2.1 x16
Memory 512 MB 1024 MB
Core Speed 700 MHz 750 MHz
Shader Speed 1400 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 900 MHz (3600 MHz effective)
Unified Shaders 96 160
Texture Mapping Units 16 8
Render Output Units 4 4
Bus Type GDDR3 GDDR5
Bus Width 128-bit 64-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 60 watts 31 watts
Shader Model 5.0 5.0
Bandwidth 28800 MB/sec 28800 MB/sec
Texel Rate 11200 Mtexels/sec 6000 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 3000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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