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Radeon HD 3850 256MB vs Radeon HD 5450

Intro

The Radeon HD 3850 256MB makes use of a 55 nm design. AMD has clocked the core speed at 668 MHz. The GDDR3 RAM runs at a speed of 828 MHz on this card. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 5450, which features clock speeds of 650 MHz on the GPU, and 800 MHz on the 512 MB of DDR3 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 5450 19 Watts
Radeon HD 3850 256MB 75 Watts
Difference: 56 Watts (295%)

Memory Bandwidth

In theory, the Radeon HD 3850 256MB should be a lot faster than the Radeon HD 5450 in general. (explain)

Radeon HD 3850 256MB 52992 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 40192 (314%)

Texel Rate

The Radeon HD 3850 256MB will be quite a bit (about 106%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 3850 256MB 10688 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 5488 (106%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 3850 256MB is superior to the Radeon HD 5450, by a large margin. (explain)

Radeon HD 3850 256MB 10688 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 8088 (311%)

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 3850 256MB

Amazon.com

Check prices at:

Radeon HD 5450

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 3850 256MB Radeon HD 5450
Manufacturer AMD AMD
Year Nov 19, 2007 February 4, 2010
Code Name RV670 PRO Cedar PRO
Memory 256 MB 512 MB
Core Speed 668 MHz 650 MHz
Memory Speed 1656 MHz 1600 MHz
Power (Max TDP) 75 watts 19 watts
Bandwidth 52992 MB/sec 12800 MB/sec
Texel Rate 10688 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 320(64x5) 80(16x5)
Texture Mapping Units 16 8
Render Output Units 16 4
Bus Type GDDR3 DDR3
Bus Width 256-bit 64-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 292 million
Bus PCIe 2.0 x16/AGP 8x PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video 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 video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3850 256MB

Amazon.com

Check prices at:

Radeon HD 5450

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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