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GeForce 9500 GT 512MB GDDR3 vs Radeon HD 5450


Intro

The GeForce 9500 GT 512MB GDDR3 features clock speeds of 550 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 32 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Compare that to the Radeon HD 5450, which features GPU clock speed of 650 MHz, and 512 MB of DDR3 RAM set to run at 800 MHz through a 64-bit bus. It also is comprised of 80(16x5) Stream Processors, 8 TAUs, and 4 ROPs.

Display Graphs

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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

The GeForce 9500 GT 512MB GDDR3 should theoretically be 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 is a lot (about 69%) better at AF 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 quite a bit (approximately 69%) more effective at full screen anti-aliasing than the Radeon HD 5450, and capable of handling higher screen resolutions while still performing well. (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

Radeon HD 5450

Specifications

Display 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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at 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 worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

GeForce 9500 GT 512MB GDDR3

Radeon HD 5450

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