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

Intro

The Radeon HD 4850 2GB features a GPU clock speed of 625 MHz, and the 2048 MB of GDDR4 memory runs at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon R7 250X 2GB, which features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R7 250X 2GB should theoretically perform just a bit faster than the Radeon HD 4850 2GB overall. (explain)

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

Texel Rate

The Radeon R7 250X 2GB will be a lot (about 60%) faster with regards to texture filtering than the Radeon HD 4850 2GB. (explain)

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

Pixel Rate

The Radeon R7 250X 2GB should be quite a bit (about 60%) better at anti-aliasing than the Radeon HD 4850 2GB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R7 250X 2GB 16000 Mpixels/sec
Radeon HD 4850 2GB 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 2GB

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.

Specifications

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Model Radeon HD 4850 2GB Radeon R7 250X 2GB
Manufacturer AMD AMD
Year Jun 25, 2008 February 2014
Code Name RV770 PRO Cape Verde XT
Memory 2048 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 GDDR4 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 information (counted in MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a 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. Pixel rate is worked out by multiplying the number of Render Output Units by the clock 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4850 2GB

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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