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GeForce 825M vs Radeon HD 4650 512MB

Intro

The GeForce 825M comes with clock speeds of 850 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs as well as 16 TAUs and 8 ROPs.

Compare all of that to the Radeon HD 4650 512MB, which comes with a clock frequency of 600 MHz and a DDR2 memory frequency of 500 MHz. It also uses a 128-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M 33 Watts
Radeon HD 4650 512MB 55 Watts
Difference: 22 Watts (67%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4650 512MB should theoretically be just a bit better than the GeForce 825M overall. (explain)

Radeon HD 4650 512MB 16000 MB/sec
GeForce 825M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The Radeon HD 4650 512MB will be a lot (about 41%) faster with regards to AF than the GeForce 825M. (explain)

Radeon HD 4650 512MB 19200 Mtexels/sec
GeForce 825M 13600 Mtexels/sec
Difference: 5600 (41%)

Pixel Rate

The GeForce 825M is a lot (about 42%) better at AA than the Radeon HD 4650 512MB, and also should be able to handle higher resolutions without slowing down too much. (explain)

GeForce 825M 6800 Mpixels/sec
Radeon HD 4650 512MB 4800 Mpixels/sec
Difference: 2000 (42%)

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

Display Prices

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GeForce 825M

Amazon.com

Check prices at:

Radeon HD 4650 512MB

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 GeForce 825M Radeon HD 4650 512MB
Manufacturer nVidia AMD
Year January 27 2014 Sep 10, 2008
Code Name GK208 RV730 PRO
Memory 2048 MB 512 MB
Core Speed 850 MHz 600 MHz
Memory Speed 1800 MHz 1000 MHz
Power (Max TDP) 33 watts 55 watts
Bandwidth 14400 MB/sec 16000 MB/sec
Texel Rate 13600 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 4800 Mpixels/sec
Unified Shaders 384 320(64x5)
Texture Mapping Units 16 32
Render Output Units 8 8
Bus Type DDR3 DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 514 million
Bus PCIe 3.0 x8 PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 825M

Amazon.com

Check prices at:

Radeon HD 4650 512MB

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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