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Radeon HD 4850 1GB vs Radeon R9 280X

Intro

The Radeon HD 4850 1GB has a GPU core speed of 625 MHz, and the 1024 MB of GDDR4 memory runs at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Compare that to the Radeon R9 280X, which uses a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 1GB 110 Watts
Radeon R9 280X 250 Watts
Difference: 140 Watts (127%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X should perform quite a bit faster than the Radeon HD 4850 1GB in general. (explain)

Radeon R9 280X 288000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 224448 (353%)

Texel Rate

The Radeon R9 280X will be much (approximately 335%) faster with regards to AF than the Radeon HD 4850 1GB. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 83800 (335%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 280X is superior to the Radeon HD 4850 1GB, by far. (explain)

Radeon R9 280X 27200 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 17200 (172%)

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 1GB

Amazon.com

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Radeon R9 280X

Amazon.com

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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 1GB Radeon R9 280X
Manufacturer AMD AMD
Year Jun 25, 2008 October 2013
Code Name RV770 PRO Tahiti XTL
Memory 1024 MB 3072 MB
Core Speed 625 MHz 850 MHz
Memory Speed 1986 MHz 6000 MHz
Power (Max TDP) 110 watts 250 watts
Bandwidth 63552 MB/sec 288000 MB/sec
Texel Rate 25000 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 800(160x5) 2048
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type GDDR4 GDDR5
Bus Width 256-bit 384-bit
Fab Process 55 nm 28 nm
Transistors 956 million 4313 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen 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 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 4850 1GB

Amazon.com

Check prices at:

Radeon R9 280X

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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