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GeForce 9500 GT 512MB GDDR3 vs Radeon HD 5450

Intro

The GeForce 9500 GT 512MB GDDR3 features a clock frequency of 550 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 128-bit bus, and makes use of a 55 nm design. It features 32 SPUs, 16 TAUs, and 8 Raster Operation Units.

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

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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

Performance-wise, the GeForce 9500 GT 512MB GDDR3 should theoretically be quite a bit superior to 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 quite a bit (approximately 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

If running with a high resolution is important to you, then the GeForce 9500 GT 512MB GDDR3 is a better choice, and very much so. (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

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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

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Model GeForce 9500 GT 512MB GDDR3 Radeon HD 5450
Manufacturer nVidia AMD
Year July 2008 February 4, 2010
Code Name G96b Cedar PRO
Memory 512 MB 512 MB
Core Speed 550 MHz 650 MHz
Memory Speed 1600 MHz 1600 MHz
Power (Max TDP) 50 watts 19 watts
Bandwidth 25600 MB/sec 12800 MB/sec
Texel Rate 8800 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 2600 Mpixels/sec
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
Fab Process 55 nm 40 nm
Transistors 314 million 292 million
Bus PCIe x16 2.0, PCI PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 processed in one second. This figure is calculated by multiplying the total amount of texture units 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 processed per second.

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

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