Geforce GTX 770 vs Radeon HD 4650 1GB

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Geforce GTX 770		230 Watts
	Difference: 175 Watts (318%)

Memory Bandwidth

The Geforce GTX 770 should theoretically be much faster than the Radeon HD 4650 1GB overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 201984 (902%)

Texel Rate

The Geforce GTX 770 is quite a bit (more or less 597%) better at AF than the Radeon HD 4650 1GB. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 114688 (597%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 770 is the winner, by a large margin. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 28672 (597%)

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 max amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.