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GeForce GTX 965M vs Radeon HD 4850 1GB

Intro

The GeForce GTX 965M has core speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon HD 4850 1GB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR4 memory runs at a speed of 993 MHz on this particular card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M 60 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 50 Watts (83%)

Memory Bandwidth

Theoretically, the GeForce GTX 965M should be just a bit faster than the Radeon HD 4850 1GB in general. (explain)

GeForce GTX 965M 64000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 448 (1%)

Texel Rate

The GeForce GTX 965M should be quite a bit (more or less 142%) more effective at anisotropic filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 965M 60416 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 35416 (142%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 965M is the winner, and very much so. (explain)

GeForce GTX 965M 30208 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 20208 (202%)

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 965M

Amazon.com

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Radeon HD 4850 1GB

Amazon.com

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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 965M Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year January 5 2015 Jun 25, 2008
Code Name GM204 RV770 PRO
Memory 2048 MB 1024 MB
Core Speed 944 MHz 625 MHz
Memory Speed 4000 MHz 1986 MHz
Power (Max TDP) 60 watts 110 watts
Bandwidth 64000 MB/sec 63552 MB/sec
Texel Rate 60416 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 30208 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 1024 800(160x5)
Texture Mapping Units 64 40
Render Output Units 32 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 956 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 (in units of MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 potential to get to the max fill rate.

Display Prices

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GeForce GTX 965M

Amazon.com

Check prices at:

Radeon HD 4850 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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