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GeForce GTX 970M vs Radeon HD 4790

Intro

The GeForce GTX 970M comes with a clock frequency of 924 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 192-bit memory bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 48 Raster Operation Units.

Compare those specs to the Radeon HD 4790, which uses a 55 nm design. AMD has set the core frequency at 600 MHz. The GDDR5 memory works at a frequency of 800 MHz on this card. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4790 should perform a bit faster than the GeForce GTX 970M overall. (explain)

Radeon HD 4790 102400 MB/sec
GeForce GTX 970M 96000 MB/sec
Difference: 6400 (7%)

Texel Rate

The GeForce GTX 970M should be a lot (approximately 285%) faster with regards to texture filtering than the Radeon HD 4790. (explain)

GeForce GTX 970M 73920 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 54720 (285%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 970M is superior to the Radeon HD 4790, and very much so. (explain)

GeForce GTX 970M 44352 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 34752 (362%)

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 GTX 970M

Amazon.com

Check prices at:

Radeon HD 4790

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 GTX 970M Radeon HD 4790
Manufacturer nVidia AMD
Year October 7 2014 2009
Code Name GM204 RV790
Memory 3072 MB 512 MB
Core Speed 924 MHz 600 MHz
Memory Speed 4000 MHz 3200 MHz
Power (Max TDP) 75 watts (Unknown) watts
Bandwidth 96000 MB/sec 102400 MB/sec
Texel Rate 73920 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 44352 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 1280 640(128x5)
Texture Mapping Units 80 32
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 959 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 largest amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 970M

Amazon.com

Check prices at:

Radeon HD 4790

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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