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Radeon HD 3870 1GB vs Radeon HD 4350

Intro

The Radeon HD 3870 1GB has a clock frequency of 775 MHz and a GDDR4 memory speed of 1125 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 4350, which features GPU core speed of 575 MHz, and 512 MB of DDR2 RAM running at 500 MHz through a 64-bit bus. It also is comprised of 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350 22 Watts
Radeon HD 3870 1GB 106 Watts
Difference: 84 Watts (382%)

Memory Bandwidth

The Radeon HD 3870 1GB should in theory perform a lot faster than the Radeon HD 4350 in general. (explain)

Radeon HD 3870 1GB 72000 MB/sec
Radeon HD 4350 8000 MB/sec
Difference: 64000 (800%)

Texel Rate

The Radeon HD 3870 1GB is quite a bit (about 170%) more effective at anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 3870 1GB 12400 Mtexels/sec
Radeon HD 4350 4600 Mtexels/sec
Difference: 7800 (170%)

Pixel Rate

The Radeon HD 3870 1GB should be much (approximately 439%) better at FSAA than the Radeon HD 4350, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 3870 1GB 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 1GB

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 1GB Radeon HD 4350
Manufacturer AMD AMD
Year Nov 19, 2007 Sep 30, 2008
Code Name RV670 XT RV710
Memory 1024 MB 512 MB
Core Speed 775 MHz 575 MHz
Memory Speed 2250 MHz 1000 MHz
Power (Max TDP) 106 watts 22 watts
Bandwidth 72000 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 GDDR4 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 data (measured in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 1GB

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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