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GeForce GTX 850M vs Radeon HD 4670 1GB

Intro

The GeForce GTX 850M features a core clock frequency of 876 MHz and a DDR3 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Compare those specifications to the Radeon HD 4670 1GB, which comes with a core clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1100 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It is comprised of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 4670 1GB 70 Watts
Difference: 30 Watts (75%)

Memory Bandwidth

Performance-wise, the Radeon HD 4670 1GB should in theory be a small bit superior to the GeForce GTX 850M in general. (explain)

Radeon HD 4670 1GB 35200 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 3200 (10%)

Texel Rate

The GeForce GTX 850M will be quite a bit (approximately 46%) better at texture filtering than the Radeon HD 4670 1GB. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 4670 1GB 24000 Mtexels/sec
Difference: 11040 (46%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 850M is superior to the Radeon HD 4670 1GB, and very much so. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 4670 1GB 6000 Mpixels/sec
Difference: 8016 (134%)

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 850M

Amazon.com

Check prices at:

Radeon HD 4670 1GB

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 850M Radeon HD 4670 1GB
Manufacturer nVidia AMD
Year March 12 2014 Sep 10, 2008
Code Name GM107 RV730 XT
Memory 2048 MB 1024 MB
Core Speed 876 MHz 750 MHz
Memory Speed 2000 MHz 2200 MHz
Power (Max TDP) 40 watts 70 watts
Bandwidth 32000 MB/sec 35200 MB/sec
Texel Rate 35040 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 640 320(64x5)
Texture Mapping Units 40 32
Render Output Units 16 8
Bus Type DDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 514 million
Bus PCIe 3.0 x16 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 information (counted in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 max fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 4670 1GB

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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