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Radeon HD 4850 512MB vs Radeon HD 5450

Intro

The Radeon HD 4850 512MB uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 memory runs at a frequency of 993 MHz on this particular model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare that to the Radeon HD 5450, which features a GPU core clock speed of 650 MHz, and 512 MB of DDR3 RAM set to run at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 91 Watts (479%)

Memory Bandwidth

The Radeon HD 4850 512MB should theoretically be much faster than the Radeon HD 5450 in general. (explain)

Radeon HD 4850 512MB 63552 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 50752 (397%)

Texel Rate

The Radeon HD 4850 512MB should be quite a bit (approximately 381%) better at texture filtering than the Radeon HD 5450. (explain)

Radeon HD 4850 512MB 25000 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 19800 (381%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4850 512MB is the winner, and very much so. (explain)

Radeon HD 4850 512MB 10000 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 7400 (285%)

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 4850 512MB

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 4850 512MB Radeon HD 5450
Manufacturer AMD AMD
Year Jun 25, 2008 February 4, 2010
Code Name RV770 PRO Cedar PRO
Memory 512 MB 512 MB
Core Speed 625 MHz 650 MHz
Memory Speed 1986 MHz 1600 MHz
Power (Max TDP) 110 watts 19 watts
Bandwidth 63552 MB/sec 12800 MB/sec
Texel Rate 25000 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 800(160x5) 80(16x5)
Texture Mapping Units 40 8
Render Output Units 16 4
Bus Type GDDR3 DDR3
Bus Width 256-bit 64-bit
Fab Process 55 nm 40 nm
Transistors 956 million 292 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses 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 texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4850 512MB

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.

Comments

4 Responses to “Radeon HD 4850 512MB vs Radeon HD 5450”
john says:

half of your tests are wrong the 6450 beats the 4850 by a long shot and you dont even have the xfx 2gb one and the 512mb 5450 still kills the 4850 try fixing your results

admin says:

Those are all theoretical benchmarks. There are no game benchmarks here (those are actual tests, these are just calculations).

Paparam says:

john, you're a stupid retarded faggot.

asd says:

5450 beats 4850? LOL wat? Are you drunk?

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