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Radeon HD 4650 512MB vs Radeon R9 M390X

Intro

The Radeon HD 4650 512MB makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The DDR2 RAM is set to run at a frequency of 500 MHz on this particular model. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.

Compare all of that to the Radeon R9 M390X, which has GPU clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 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 M390X 125 Watts
Difference: 70 Watts (127%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should theoretically be quite a bit superior to the Radeon HD 4650 512MB overall. (explain)

Radeon R9 M390X 160000 MB/sec
Radeon HD 4650 512MB 16000 MB/sec
Difference: 144000 (900%)

Texel Rate

The Radeon R9 M390X is a lot (approximately 382%) faster with regards to texture filtering than the Radeon HD 4650 512MB. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon HD 4650 512MB 19200 Mtexels/sec
Difference: 73344 (382%)

Pixel Rate

The Radeon R9 M390X should be much (about 382%) more effective at AA than the Radeon HD 4650 512MB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M390X 23136 Mpixels/sec
Radeon HD 4650 512MB 4800 Mpixels/sec
Difference: 18336 (382%)

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 M390X

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 M390X
Manufacturer AMD AMD
Year Sep 10, 2008 2015
Code Name RV730 PRO Tonga
Memory 512 MB 4096 MB
Core Speed 600 MHz 723 MHz
Memory Speed 1000 MHz 5000 MHz
Power (Max TDP) 55 watts 125 watts
Bandwidth 16000 MB/sec 160000 MB/sec
Texel Rate 19200 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 4800 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 320(64x5) 2048
Texture Mapping Units 32 128
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 514 million (Unknown) million
Bus PCIe 2.0 x16, AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially 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 M390X

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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