GeForce 9500 GT 512MB GDDR3 vs Radeon HD 4670 512MB

Intro

Compare those specs to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM is set to run at a frequency of 1000 MHz on this particular model. It features 320(64x5) SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 512MB GDDR3		50 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 20 Watts (40%)

Memory Bandwidth

Performance-wise, the Radeon HD 4670 512MB should in theory be quite a bit better than the GeForce 9500 GT 512MB GDDR3 in general. (explain)

Radeon HD 4670 512MB		32000 MB/sec
GeForce 9500 GT 512MB GDDR3		25600 MB/sec
	Difference: 6400 (25%)

Texel Rate

The Radeon HD 4670 512MB should be much (about 173%) more effective at anisotropic filtering than the GeForce 9500 GT 512MB GDDR3. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce 9500 GT 512MB GDDR3		8800 Mtexels/sec
	Difference: 15200 (173%)

Pixel Rate

The Radeon HD 4670 512MB should be a lot (about 36%) better at full screen anti-aliasing than the GeForce 9500 GT 512MB GDDR3, and able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
GeForce 9500 GT 512MB GDDR3		4400 Mpixels/sec
	Difference: 1600 (36%)

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 transferred across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure 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 drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.