GeForce GTX 950M vs Radeon HD 4770

Intro

Compare that to the Radeon HD 4770, which has core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
Radeon HD 4770		80 Watts
	Difference: 25 Watts (45%)

Memory Bandwidth

In theory, the Radeon HD 4770 is 60% quicker than the GeForce GTX 950M in general, due to its higher data rate. (explain)

Radeon HD 4770		51200 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 19200 (60%)

Texel Rate

The GeForce GTX 950M is quite a bit (more or less 52%) faster with regards to AF than the Radeon HD 4770. (explain)

GeForce GTX 950M		36560 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 12560 (52%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 950M is a better choice, by far. (explain)

GeForce GTX 950M		14624 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 2624 (22%)

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 data (in units of MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.