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Radeon HD 4350 vs Radeon HD 6790

Intro

The Radeon HD 4350 makes use of a 55 nm design. AMD has set the core frequency at 575 MHz. The DDR2 RAM works at a speed of 500 MHz on this card. It features 80(16x5) SPUs along with 8 TAUs and 4 ROPs.

Compare those specs to the Radeon HD 6790, which makes use of a 40 nm design. AMD has set the core frequency at 840 MHz. The GDDR5 memory works at a frequency of 1050 MHz on this specific card. It features 800 SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350 22 Watts
Radeon HD 6790 150 Watts
Difference: 128 Watts (582%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6790 should in theory be much better than the Radeon HD 4350 overall. (explain)

Radeon HD 6790 134400 MB/sec
Radeon HD 4350 8000 MB/sec
Difference: 126400 (1580%)

Texel Rate

The Radeon HD 6790 should be a lot (about 630%) more effective at AF than the Radeon HD 4350. (explain)

Radeon HD 6790 33600 Mtexels/sec
Radeon HD 4350 4600 Mtexels/sec
Difference: 29000 (630%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6790 is the winner, and very much so. (explain)

Radeon HD 6790 13440 Mpixels/sec
Radeon HD 4350 2300 Mpixels/sec
Difference: 11140 (484%)

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 6790

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 6790
Manufacturer AMD AMD
Year Sep 30, 2008 April 2011
Code Name RV710 Barts LE
Memory 512 MB 1024 MB
Core Speed 575 MHz 840 MHz
Memory Speed 1000 MHz 4200 MHz
Power (Max TDP) 22 watts 150 watts
Bandwidth 8000 MB/sec 134400 MB/sec
Texel Rate 4600 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 2300 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 80(16x5) 800
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 64-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 242 million 1700 million
Bus PCIe 2.0 x16, PCI PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the 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 6790

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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