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Radeon HD 3870 512MB vs Radeon HD 4350

Intro

The Radeon HD 3870 512MB comes with core speeds of 775 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4350, which comes with core speeds of 575 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 memory. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350 22 Watts
Radeon HD 3870 512MB 106 Watts
Difference: 84 Watts (382%)

Memory Bandwidth

In theory, the Radeon HD 3870 512MB should be much faster than the Radeon HD 4350 in general. (explain)

Radeon HD 3870 512MB 57600 MB/sec
Radeon HD 4350 8000 MB/sec
Difference: 49600 (620%)

Texel Rate

The Radeon HD 3870 512MB is quite a bit (approximately 170%) more effective at AF than the Radeon HD 4350. (explain)

Radeon HD 3870 512MB 12400 Mtexels/sec
Radeon HD 4350 4600 Mtexels/sec
Difference: 7800 (170%)

Pixel Rate

The Radeon HD 3870 512MB is a lot (about 439%) faster with regards to FSAA than the Radeon HD 4350, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 3870 512MB 12400 Mpixels/sec
Radeon HD 4350 2300 Mpixels/sec
Difference: 10100 (439%)

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 3870 512MB

Amazon.com

Check prices at:

Radeon HD 4350

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 3870 512MB Radeon HD 4350
Manufacturer AMD AMD
Year Nov 19, 2007 Sep 30, 2008
Code Name RV670 XT RV710
Memory 512 MB 512 MB
Core Speed 775 MHz 575 MHz
Memory Speed 1800 MHz 1000 MHz
Power (Max TDP) 106 watts 22 watts
Bandwidth 57600 MB/sec 8000 MB/sec
Texel Rate 12400 Mtexels/sec 4600 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 2300 Mpixels/sec
Unified Shaders 320(64x5) 80(16x5)
Texture Mapping Units 16 8
Render Output Units 16 4
Bus Type GDDR3 DDR2
Bus Width 256-bit 64-bit
Fab Process 55 nm 55 nm
Transistors (Unknown) million 242 million
Bus PCIe 2.0 x16/AGP 8x PCIe 2.0 x16, PCI
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon HD 4350

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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