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GeForce GT 430 1GB vs Radeon HD 4850 512MB

Intro

The GeForce GT 430 1GB comes with a core clock speed of 700 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 96 SPUs, 16 Texture Address Units, and 4 ROPs.

Compare that to the Radeon HD 4850 512MB, which comes with GPU clock speed of 625 MHz, and 512 MB of GDDR3 RAM running at 993 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 1GB 60 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 50 Watts (83%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 512MB should theoretically be quite a bit superior to the GeForce GT 430 1GB in general. (explain)

Radeon HD 4850 512MB 63552 MB/sec
GeForce GT 430 1GB 28800 MB/sec
Difference: 34752 (121%)

Texel Rate

The Radeon HD 4850 512MB will be a lot (more or less 123%) faster with regards to texture filtering than the GeForce GT 430 1GB. (explain)

Radeon HD 4850 512MB 25000 Mtexels/sec
GeForce GT 430 1GB 11200 Mtexels/sec
Difference: 13800 (123%)

Pixel Rate

The Radeon HD 4850 512MB should be quite a bit (more or less 257%) faster with regards to FSAA than the GeForce GT 430 1GB, and should be capable of handling higher resolutions better. (explain)

Radeon HD 4850 512MB 10000 Mpixels/sec
GeForce GT 430 1GB 2800 Mpixels/sec
Difference: 7200 (257%)

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 1GB

Amazon.com

Radeon HD 4850 512MB

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 1GB Radeon HD 4850 512MB
Manufacturer nVidia AMD
Year October 2010 Jun 25, 2008
Code Name GF108 RV770 PRO
Fab Process 40 nm 55 nm
Bus PCIe x16 PCIe 2.0 x16
Memory 1024 MB 512 MB
Core Speed 700 MHz 625 MHz
Shader Speed 1400 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 993 MHz (1986 MHz effective)
Unified Shaders 96 800(160x5)
Texture Mapping Units 16 40
Render Output Units 4 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-bit
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0
Power (Max TDP) 60 watts 110 watts
Shader Model 5.0 4.1
Bandwidth 28800 MB/sec 63552 MB/sec
Texel Rate 11200 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 10000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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