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GeForce GT 430 vs Radeon HD 7750


Intro

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

Compare all that to the Radeon HD 7750, which features a clock frequency of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce GT 430 60 Watts
Difference: 5 Watts (9%)

Memory Bandwidth

In theory, the Radeon HD 7750 will be 150% quicker than the GeForce GT 430 in general, due to its higher data rate. (explain)

Radeon HD 7750 72000 MB/sec
GeForce GT 430 28800 MB/sec
Difference: 43200 (150%)

Texel Rate

The Radeon HD 7750 should be much (about 129%) more effective at texture filtering than the GeForce GT 430. (explain)

Radeon HD 7750 25600 Mtexels/sec
GeForce GT 430 11200 Mtexels/sec
Difference: 14400 (129%)

Pixel Rate

The Radeon HD 7750 is quite a bit (about 357%) better at FSAA than the GeForce GT 430, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7750 12800 Mpixels/sec
GeForce GT 430 2800 Mpixels/sec
Difference: 10000 (357%)

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 7750

Specifications

Display Specifications

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Model GeForce GT 430 Radeon HD 7750
Manufacturer nVidia AMD
Year October 2010 February 2012
Code Name GF108 Cape Verde Pro
Memory 512 MB 1024 MB
Core Speed 700 MHz 800 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 60 watts 55 watts
Bandwidth 28800 MB/sec 72000 MB/sec
Texel Rate 11200 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 96 512
Texture Mapping Units 16 32
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 585 million 1500 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 fill 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 ability to reach the max fill rate.

GeForce GT 430

Radeon HD 7750

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