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Radeon HD 3650 512MB vs Radeon HD 7750

Intro

The Radeon HD 3650 512MB features a GPU clock speed of 725 MHz, and the 512 MB of GDDR3 RAM is set to run at 800 MHz through a 128-bit bus. It also features 120(24x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Compare all that to the Radeon HD 7750, which has GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 512 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 3650 512MB 78 Watts
Difference: 23 Watts (42%)

Memory Bandwidth

Performance-wise, the Radeon HD 7750 should theoretically be quite a bit superior to the Radeon HD 3650 512MB in general. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 46400 (181%)

Texel Rate

The Radeon HD 7750 will be a lot (approximately 341%) better at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 7750 25600 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 19800 (341%)

Pixel Rate

The Radeon HD 7750 will be much (approximately 341%) better at AA than the Radeon HD 3650 512MB, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7750 12800 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 9900 (341%)

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

Check prices at:

Radeon HD 7750

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 3650 512MB Radeon HD 7750
Manufacturer AMD AMD
Year 2008 February 2012
Code Name RV635 PRO Cape Verde Pro
Memory 512 MB 1024 MB
Core Speed 725 MHz 800 MHz
Memory Speed 1600 MHz 4500 MHz
Power (Max TDP) 78 watts 55 watts
Bandwidth 25600 MB/sec 72000 MB/sec
Texel Rate 5800 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 120(24x5) 512
Texture Mapping Units 8 32
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million 1500 million
Bus PCIe 2.0 x16/AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated 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 drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650 512MB

Amazon.com

Check prices at:

Radeon HD 7750

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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