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Radeon HD 4850 512MB vs Radeon R7 250X 2GB

Intro

The Radeon HD 4850 512MB features a clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Compare those specifications to the Radeon R7 250X 2GB, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory is set to run at a speed of 1125 MHz on this card. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB 95 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 15 Watts (16%)

Memory Bandwidth

In theory, the Radeon R7 250X 2GB should be 13% quicker than the Radeon HD 4850 512MB in general, because of its higher data rate. (explain)

Radeon R7 250X 2GB 72000 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 8448 (13%)

Texel Rate

The Radeon R7 250X 2GB should be much (approximately 60%) better at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

Radeon R7 250X 2GB 40000 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 15000 (60%)

Pixel Rate

The Radeon R7 250X 2GB should be quite a bit (more or less 60%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 512MB, and should be able to handle higher resolutions without slowing down too much. (explain)

Radeon R7 250X 2GB 16000 Mpixels/sec
Radeon HD 4850 512MB 10000 Mpixels/sec
Difference: 6000 (60%)

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

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Radeon R7 250X 2GB

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 512MB Radeon R7 250X 2GB
Manufacturer AMD AMD
Year Jun 25, 2008 February 2014
Code Name RV770 PRO Cape Verde XT
Memory 512 MB 2048 MB
Core Speed 625 MHz 1000 MHz
Memory Speed 1986 MHz 4500 MHz
Power (Max TDP) 110 watts 95 watts
Bandwidth 63552 MB/sec 72000 MB/sec
Texel Rate 25000 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 800(160x5) 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 1500 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 maximum amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of 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 clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4850 512MB

Amazon.com

Check prices at:

Radeon R7 250X 2GB

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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