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Radeon HD 4850 2GB vs Radeon R7 250

Intro

The Radeon HD 4850 2GB features a core clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also features a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Compare that to the Radeon R7 250, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 RAM is set to run at a speed of 1150 MHz on this card. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 4850 2GB 110 Watts
Difference: 45 Watts (69%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 should perform just a bit faster than the Radeon HD 4850 2GB in general. (explain)

Radeon R7 250 73600 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 10048 (16%)

Texel Rate

The Radeon HD 4850 2GB is a bit (about 4%) better at anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 4850 2GB 25000 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 1000 (4%)

Pixel Rate

The Radeon HD 4850 2GB will be a lot (about 25%) better at anti-aliasing than the Radeon R7 250, and also able to handle higher screen resolutions better. (explain)

Radeon HD 4850 2GB 10000 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 2000 (25%)

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 2GB

Amazon.com

Check prices at:

Radeon R7 250

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 2GB Radeon R7 250
Manufacturer AMD AMD
Year Jun 25, 2008 October 2013
Code Name RV770 PRO Oland XT
Memory 2048 MB 1024 MB
Core Speed 625 MHz 1000 MHz
Memory Speed 1986 MHz 4600 MHz
Power (Max TDP) 110 watts 65 watts
Bandwidth 63552 MB/sec 73600 MB/sec
Texel Rate 25000 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 800(160x5) 384
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR4 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 1040 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: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 can be applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 4850 2GB

Amazon.com

Check prices at:

Radeon R7 250

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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