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GeForce 830M vs Radeon HD 4770

Intro

The GeForce 830M features clock speeds of 1029 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 256 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

Compare all that to the Radeon HD 4770, which comes with a clock speed of 750 MHz and a GDDR5 memory speed of 800 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
Radeon HD 4770 80 Watts
Difference: 55 Watts (220%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4770 should perform quite a bit faster than the GeForce 830M overall. (explain)

Radeon HD 4770 51200 MB/sec
GeForce 830M 14400 MB/sec
Difference: 36800 (256%)

Texel Rate

The Radeon HD 4770 is quite a bit (about 46%) more effective at AF than the GeForce 830M. (explain)

Radeon HD 4770 24000 Mtexels/sec
GeForce 830M 16464 Mtexels/sec
Difference: 7536 (46%)

Pixel Rate

The Radeon HD 4770 will be much (about 46%) faster with regards to FSAA than the GeForce 830M, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4770 12000 Mpixels/sec
GeForce 830M 8232 Mpixels/sec
Difference: 3768 (46%)

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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GeForce 830M

Amazon.com

Check prices at:

Radeon HD 4770

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 830M Radeon HD 4770
Manufacturer nVidia AMD
Year March 12 2014 Apr 28, 2009
Code Name GM108 RV740
Memory 2048 MB 512 MB
Core Speed 1029 MHz 750 MHz
Memory Speed 1800 MHz 3200 MHz
Power (Max TDP) 25 watts 80 watts
Bandwidth 14400 MB/sec 51200 MB/sec
Texel Rate 16464 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 256 640(128x5)
Texture Mapping Units 16 32
Render Output Units 8 16
Bus Type DDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 826 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
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 (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at 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 could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 830M

Amazon.com

Check prices at:

Radeon HD 4770

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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