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Radeon HD 3650 512MB vs Radeon HD 7750

Intro

The Radeon HD 3650 512MB uses a 55 nm design. AMD has set the core frequency at 725 MHz. The GDDR3 memory is set to run at a frequency of 800 MHz on this particular model. It features 120(24x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare those specs to the Radeon HD 7750, which comes with clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 512 SPUs as well as 32 TAUs and 16 ROPs.

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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

The Radeon HD 7750 should in theory be a lot faster than 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 should be quite a bit (about 341%) more effective at AF 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 quite a bit (approximately 341%) faster with regards to AA than the Radeon HD 3650 512MB, and also capable of handling higher screen resolutions while still performing well. (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 information (counted in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max 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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