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Radeon HD 3470 256MB vs Radeon HD 6750 1GB

Intro

The Radeon HD 3470 256MB has a GPU core clock speed of 800 MHz, and the 256 MB of DDR2 RAM runs at 950 MHz through a 128-bit bus. It also is made up of 40(8x5) Stream Processors, 4 Texture Address Units, and 4 ROPs.

Compare those specifications to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this card. It features 720 SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 6750 1GB should in theory be a lot superior to the Radeon HD 3470 256MB overall. (explain)

Radeon HD 6750 1GB 64000 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 33600 (111%)

Texel Rate

The Radeon HD 6750 1GB is a lot (approximately 716%) more effective at texture filtering than the Radeon HD 3470 256MB. (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 22900 (716%)

Pixel Rate

The Radeon HD 6750 1GB is a lot (about 263%) more effective at FSAA than the Radeon HD 3470 256MB, and will be able to handle higher resolutions better. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 8400 (263%)

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 3470 256MB

Amazon.com

Check prices at:

Radeon HD 6750 1GB

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 3470 256MB Radeon HD 6750 1GB
Manufacturer AMD AMD
Year 2008 January 2011
Code Name RV620 PRO Juniper Pro
Memory 256 MB 1024 MB
Core Speed 800 MHz 725 MHz
Memory Speed 1900 MHz 4000 MHz
Power (Max TDP) (Unknown) watts 86 watts
Bandwidth 30400 MB/sec 64000 MB/sec
Texel Rate 3200 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 40(8x5) 720
Texture Mapping Units 4 36
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 1040 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses 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 number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of 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 3470 256MB

Amazon.com

Check prices at:

Radeon HD 6750 1GB

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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