GeForce GTX 980M vs Radeon HD 4650 1GB

Intro

Compare those specs to the Radeon HD 4650 1GB, which features a clock speed of 600 MHz and a GDDR3 memory frequency of 700 MHz. It also uses a 128-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 980M		100 Watts
	Difference: 45 Watts (82%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be 471% faster than the Radeon HD 4650 1GB in general, because of its higher data rate. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 105600 (471%)

Texel Rate

The GeForce GTX 980M will be a lot (about 419%) better at AF than the Radeon HD 4650 1GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 80448 (419%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 980M is a better choice, by far. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 61632 (1284%)

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: Bandwidth is the largest amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.