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Radeon HD 4650 512MB vs Radeon R9 380 4G

Intro

The Radeon HD 4650 512MB has a GPU core clock speed of 600 MHz, and the 512 MB of DDR2 memory runs at 500 MHz through a 128-bit bus. It also is comprised of 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Compare all of that to the Radeon R9 380 4G, which uses a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 RAM works at a frequency of 1425 MHz on this particular card. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB 55 Watts
Radeon R9 380 4G 190 Watts
Difference: 135 Watts (245%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G is 1040% quicker than the Radeon HD 4650 512MB overall, due to its greater data rate. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon HD 4650 512MB 16000 MB/sec
Difference: 166400 (1040%)

Texel Rate

The Radeon R9 380 4G will be much (about 466%) more effective at AF than the Radeon HD 4650 512MB. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon HD 4650 512MB 19200 Mtexels/sec
Difference: 89440 (466%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 380 4G is the winner, by a large margin. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon HD 4650 512MB 4800 Mpixels/sec
Difference: 26240 (547%)

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 4650 512MB

Amazon.com

Check prices at:

Radeon R9 380 4G

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 4650 512MB Radeon R9 380 4G
Manufacturer AMD AMD
Year Sep 10, 2008 June 2015
Code Name RV730 PRO Antigua PRO
Memory 512 MB 4096 MB
Core Speed 600 MHz 970 MHz
Memory Speed 1000 MHz 5700 MHz
Power (Max TDP) 55 watts 190 watts
Bandwidth 16000 MB/sec 182400 MB/sec
Texel Rate 19200 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 4800 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 320(64x5) 1792
Texture Mapping Units 32 112
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 514 million 5000 million
Bus PCIe 2.0 x16, AGP 8x PCIe 3.0 ×16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4650 512MB

Amazon.com

Check prices at:

Radeon R9 380 4G

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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