GeForce GT 320 vs Radeon HD 4770

Intro

Compare those specifications 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 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4770		80 Watts
	Difference: 37 Watts (86%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4770 should in theory be quite a bit better than the GeForce GT 320 overall. (explain)

Radeon HD 4770		51200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 25920 (103%)

Texel Rate

The Radeon HD 4770 will be quite a bit (more or less 85%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 4770		24000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 11040 (85%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4770 is the winner, by far. (explain)

Radeon HD 4770		12000 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 7680 (178%)

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 largest amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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