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Radeon HD 3470 256MB vs Radeon HD 7750

Intro

The Radeon HD 3470 256MB has a clock speed of 800 MHz and a DDR2 memory frequency of 950 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It is made up of 40(8x5) SPUs, 4 TAUs, and 4 Raster Operation Units.

Compare all of that to the Radeon HD 7750, which features a clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is comprised of 512 SPUs, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 7750 should theoretically be a lot better than the Radeon HD 3470 256MB overall. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 41600 (137%)

Texel Rate

The Radeon HD 7750 is quite a bit (approximately 700%) more effective at anisotropic filtering than the Radeon HD 3470 256MB. (explain)

Radeon HD 7750 25600 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 22400 (700%)

Pixel Rate

The Radeon HD 7750 is a lot (approximately 300%) better at anti-aliasing than the Radeon HD 3470 256MB, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7750 12800 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 9600 (300%)

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 7750

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 7750
Manufacturer AMD AMD
Year 2008 February 2012
Code Name RV620 PRO Cape Verde Pro
Memory 256 MB 1024 MB
Core Speed 800 MHz 800 MHz
Memory Speed 1900 MHz 4500 MHz
Power (Max TDP) (Unknown) watts 55 watts
Bandwidth 30400 MB/sec 72000 MB/sec
Texel Rate 3200 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 40(8x5) 512
Texture Mapping Units 4 32
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million 1500 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 3470 256MB

Amazon.com

Check prices at:

Radeon HD 7750

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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