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GeForce 9500 GT 512MB GDDR3 vs Radeon HD 5450

Intro

The GeForce 9500 GT 512MB GDDR3 comes with a GPU clock speed of 550 MHz, and the 512 MB of GDDR3 memory runs at 800 MHz through a 128-bit bus. It also is comprised of 32 Stream Processors, 16 Texture Address Units, and 8 ROPs.

Compare that to the Radeon HD 5450, which comes with a core clock speed of 650 MHz and a DDR3 memory speed of 800 MHz. It also makes use of a 64-bit memory bus, and uses a 40 nm design. It features 80(16x5) SPUs, 8 Texture Address Units, and 4 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
GeForce 9500 GT 512MB GDDR3 50 Watts
Difference: 31 Watts (163%)

Memory Bandwidth

In theory, the GeForce 9500 GT 512MB GDDR3 should perform quite a bit faster than the Radeon HD 5450 overall. (explain)

GeForce 9500 GT 512MB GDDR3 25600 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 12800 (100%)

Texel Rate

The GeForce 9500 GT 512MB GDDR3 will be much (about 69%) better at texture filtering than the Radeon HD 5450. (explain)

GeForce 9500 GT 512MB GDDR3 8800 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 3600 (69%)

Pixel Rate

The GeForce 9500 GT 512MB GDDR3 should be much (about 69%) faster with regards to anti-aliasing than the Radeon HD 5450, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce 9500 GT 512MB GDDR3 4400 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 1800 (69%)

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

GeForce 9500 GT 512MB GDDR3

Amazon.com

Radeon HD 5450

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce 9500 GT 512MB GDDR3 Radeon HD 5450
Manufacturer nVidia AMD
Year July 2008 February 4, 2010
Code Name G96b Cedar PRO
Fab Process 55 nm 40 nm
Bus PCIe x16 2.0, PCI PCIe 2.1 x16
Memory 512 MB 512 MB
Core Speed 550 MHz 650 MHz
Shader Speed 1400 MHz (N/A) MHz
Memory Speed 800 MHz (1600 MHz effective) 800 MHz (1600 MHz effective)
Unified Shaders 32 80(16x5)
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type GDDR3 DDR3
Bus Width 128-bit 64-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2
Power (Max TDP) 50 watts 19 watts
Shader Model 4.0 5.0
Bandwidth 25600 MB/sec 12800 MB/sec
Texel Rate 8800 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 2600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

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