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Radeon HD 3870 1GB vs Radeon HD 4350

Intro

The Radeon HD 3870 1GB comes with a core clock frequency of 775 MHz and a GDDR4 memory frequency of 1125 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 4350, which makes use of a 55 nm design. AMD has clocked the core frequency at 575 MHz. The DDR2 RAM works at a speed of 500 MHz on this particular card. It features 80(16x5) SPUs along with 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 1GB 106 Watts
Difference: 84 Watts (382%)

Memory Bandwidth

In theory, the Radeon HD 3870 1GB should perform quite a bit faster than the Radeon HD 4350 overall. (explain)

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

Texel Rate

The Radeon HD 3870 1GB will be much (more or less 170%) better 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 is quite a bit (approximately 439%) better at full screen anti-aliasing than the Radeon HD 4350, and also should be able to handle higher screen resolutions better. (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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If 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 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 number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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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.

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