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Radeon HD 4850 X2 512MB vs Radeon R7 240

Intro

The Radeon HD 4850 X2 512MB comes with a core clock speed of 625 MHz and a GDDR3 memory speed of 993 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon R7 240, which makes use of a 28 nm design. AMD has set the core frequency at 730 MHz. The DDR3 memory is set to run at a speed of 900 MHz on this card. It features 320 SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240 30 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 220 Watts (733%)

Memory Bandwidth

In theory, the Radeon HD 4850 X2 512MB will be 341% quicker than the Radeon R7 240 overall, due to its greater data rate. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
Radeon R7 240 28800 MB/sec
Difference: 98304 (341%)

Texel Rate

The Radeon HD 4850 X2 512MB is much (more or less 242%) faster with regards to AF than the Radeon R7 240. (explain)

Radeon HD 4850 X2 512MB 50000 Mtexels/sec
Radeon R7 240 14600 Mtexels/sec
Difference: 35400 (242%)

Pixel Rate

The Radeon HD 4850 X2 512MB is a lot (approximately 242%) faster with regards to AA than the Radeon R7 240, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 4850 X2 512MB 20000 Mpixels/sec
Radeon R7 240 5840 Mpixels/sec
Difference: 14160 (242%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 4850 X2 512MB

Amazon.com

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Radeon R7 240

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 X2 512MB Radeon R7 240
Manufacturer AMD AMD
Year Nov 7, 2008 October 2013
Code Name R700 Oland PRO
Memory 512 MB (x2) 2048 MB
Core Speed 625 MHz (x2) 730 MHz
Memory Speed 1986 MHz (x2) 1800 MHz
Power (Max TDP) 250 watts 30 watts
Bandwidth 127104 MB/sec 28800 MB/sec
Texel Rate 50000 Mtexels/sec 14600 Mtexels/sec
Pixel Rate 20000 Mpixels/sec 5840 Mpixels/sec
Unified Shaders 800(160x5) (x2) 320
Texture Mapping Units 40 (x2) 20
Render Output Units 16 (x2) 8
Bus Type GDDR3 DDR3
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 1040 million
Bus PCIe 2.0 x16 (PCIe bridge) 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 largest amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video 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 maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 X2 512MB

Amazon.com

Check prices at:

Radeon R7 240

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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