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GeForce GTS 250 1GB vs Radeon HD 5450

Intro

The GeForce GTS 250 1GB has core clock speeds of 738 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR3 RAM. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 5450, which uses a 40 nm design. AMD has set the core speed at 650 MHz. The DDR3 RAM works at a speed of 800 MHz on this particular model. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
GeForce GTS 250 1GB 145 Watts
Difference: 126 Watts (663%)

Memory Bandwidth

In theory, the GeForce GTS 250 1GB should be a lot faster than the Radeon HD 5450 overall. (explain)

GeForce GTS 250 1GB 70400 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 57600 (450%)

Texel Rate

The GeForce GTS 250 1GB will be much (about 808%) better at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce GTS 250 1GB 47232 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 42032 (808%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 250 1GB is the winner, and very much so. (explain)

GeForce GTS 250 1GB 11808 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 9208 (354%)

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 GTS 250 1GB

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 GTS 250 1GB Radeon HD 5450
Manufacturer nVidia AMD
Year March 3, 2009 February 4, 2010
Code Name G92a/b Cedar PRO
Memory 1024 MB 512 MB
Core Speed 738 MHz 650 MHz
Memory Speed 2200 MHz 1600 MHz
Power (Max TDP) 145 watts 19 watts
Bandwidth 70400 MB/sec 12800 MB/sec
Texel Rate 47232 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 128 80(16x5)
Texture Mapping Units 64 8
Render Output Units 16 4
Bus Type GDDR3 DDR3
Bus Width 256-bit 64-bit
Fab Process 65/55 nm 40 nm
Transistors 754 million 292 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 3.2

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better 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 most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTS 250 1GB

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.

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