GeForce GTX 965M vs Radeon HD 4850 2GB

Intro

Compare all that to the Radeon HD 4850 2GB, which uses a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR4 memory is set to run at a frequency of 993 MHz on this particular model. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

The GeForce GTX 965M, in theory, should perform a bit faster than the Radeon HD 4850 2GB overall. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 448 (1%)

Texel Rate

The GeForce GTX 965M should be quite a bit (about 142%) more effective at texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 35416 (142%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 965M is the winner, by far. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 4850 2GB		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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.