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Radeon HD 3650 512MB vs Radeon R7 250

Intro

The Radeon HD 3650 512MB makes use of a 55 nm design. AMD has clocked the core speed at 725 MHz. The GDDR3 RAM runs at a speed of 800 MHz on this particular card. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 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 memory is set to run at a frequency of 1150 MHz on this particular model. It features 384 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 3650 512MB 78 Watts
Difference: 13 Watts (20%)

Memory Bandwidth

In theory, the Radeon R7 250 will be 188% quicker than the Radeon HD 3650 512MB in general, due to its greater bandwidth. (explain)

Radeon R7 250 73600 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 48000 (188%)

Texel Rate

The Radeon R7 250 should be a lot (approximately 314%) faster with regards to AF than the Radeon HD 3650 512MB. (explain)

Radeon R7 250 24000 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 18200 (314%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R7 250 is a better choice, by a large margin. (explain)

Radeon R7 250 8000 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 5100 (176%)

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 3650 512MB

Amazon.com

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Radeon R7 250

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 3650 512MB Radeon R7 250
Manufacturer AMD AMD
Year 2008 October 2013
Code Name RV635 PRO Oland XT
Memory 512 MB 1024 MB
Core Speed 725 MHz 1000 MHz
Memory Speed 1600 MHz 4600 MHz
Power (Max TDP) 78 watts 65 watts
Bandwidth 25600 MB/sec 73600 MB/sec
Texel Rate 5800 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 120(24x5) 384
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million 1040 million
Bus PCIe 2.0 x16/AGP 8x 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 over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 3650 512MB

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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