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Radeon HD 4350 vs Radeon HD 6790

Intro

The Radeon HD 4350 has clock speeds of 575 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 RAM. It features 80(16x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Compare that to the Radeon HD 6790, which has clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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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

Theoretically, the Radeon HD 6790 should be quite a bit faster 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 will be quite a bit (more or less 630%) faster with regards to texture filtering than the Radeon HD 4350. (explain)

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

Pixel Rate

The Radeon HD 6790 should be quite a bit (approximately 484%) faster with regards to anti-aliasing than the Radeon HD 4350, and also able to handle higher resolutions more effectively. (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 (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once 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 are applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to 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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