GeForce GTS 450 vs Radeon HD 4650 512MB

Intro

Compare all that to the Radeon HD 4650 512MB, which comes with a GPU core clock speed of 600 MHz, and 512 MB of DDR2 memory set to run at 500 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTS 450		106 Watts
	Difference: 51 Watts (93%)

Memory Bandwidth

The GeForce GTS 450 should theoretically perform quite a bit faster than the Radeon HD 4650 512MB in general. (explain)

GeForce GTS 450		57728 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 41728 (261%)

Texel Rate

The GeForce GTS 450 will be quite a bit (more or less 31%) more effective at texture filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTS 450		25056 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 5856 (31%)

Pixel Rate

The GeForce GTS 450 should be quite a bit (more or less 161%) better at FSAA than the Radeon HD 4650 512MB, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 7728 (161%)

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 data (in units of MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.