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Radeon HD 4350 vs Radeon HD 6790

Intro

The Radeon HD 4350 features core 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 TAUs and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6790, which features GPU core speed of 840 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 256-bit bus. It also features 800 SPUs, 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

The Radeon HD 6790, in theory, should be much 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 is 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 is a lot (more or less 484%) faster with regards to anti-aliasing than the Radeon HD 4350, and also able to handle higher screen 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 max amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum 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 this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum 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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