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Radeon HD 4650 512MB vs Radeon R9 380 4G

Intro

The Radeon HD 4650 512MB features a core clock speed of 600 MHz and a DDR2 memory speed of 500 MHz. It also uses a 128-bit bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the Radeon R9 380 4G, which uses a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM is set to run at a frequency of 1425 MHz on this specific card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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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

The Radeon R9 380 4G should in theory perform quite a bit faster than the Radeon HD 4650 512MB overall. (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%) better at texture filtering 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

The Radeon R9 380 4G will be quite a bit (approximately 547%) more effective at anti-aliasing than the Radeon HD 4650 512MB, and capable of handling higher screen resolutions while still performing well. (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 max amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video 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 that the graphics card could possibly record to the local memory in one 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to 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 potential to reach the max 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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