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Radeon HD 4350 vs Radeon HD 7850

Intro

The Radeon HD 4350 has a GPU core speed of 575 MHz, and the 512 MB of DDR2 memory runs at 500 MHz through a 64-bit bus. It also is comprised of 80(16x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Compare all that to the Radeon HD 7850, which features GPU core speed of 860 MHz, and 2048 MB of GDDR5 memory set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1024 Stream Processors, 64 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350 22 Watts
Radeon HD 7850 130 Watts
Difference: 108 Watts (491%)

Memory Bandwidth

The Radeon HD 7850, in theory, should perform much faster than the Radeon HD 4350 in general. (explain)

Radeon HD 7850 153600 MB/sec
Radeon HD 4350 8000 MB/sec
Difference: 145600 (1820%)

Texel Rate

The Radeon HD 7850 should be quite a bit (more or less 1097%) faster with regards to texture filtering than the Radeon HD 4350. (explain)

Radeon HD 7850 55040 Mtexels/sec
Radeon HD 4350 4600 Mtexels/sec
Difference: 50440 (1097%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 7850 is a better choice, and very much so. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon HD 4350 2300 Mpixels/sec
Difference: 25220 (1097%)

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

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Radeon HD 4350

Amazon.com

Check prices at:

Radeon HD 7850

Amazon.com

Check prices at:

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

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Model Radeon HD 4350 Radeon HD 7850
Manufacturer AMD AMD
Year Sep 30, 2008 March 2012
Code Name RV710 Pitcairn Pro
Memory 512 MB 2048 MB
Core Speed 575 MHz 860 MHz
Memory Speed 1000 MHz 4800 MHz
Power (Max TDP) 22 watts 130 watts
Bandwidth 8000 MB/sec 153600 MB/sec
Texel Rate 4600 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 2300 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 80(16x5) 1024
Texture Mapping Units 8 64
Render Output Units 4 32
Bus Type DDR2 GDDR5
Bus Width 64-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 242 million 2800 million
Bus PCIe 2.0 x16, PCI PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, 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 number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4350

Amazon.com

Check prices at:

Radeon HD 7850

Amazon.com

Check prices at:

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.

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