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GeForce GTS 250 1GB vs Radeon HD 5450

Intro

The GeForce GTS 250 1GB comes with a GPU clock speed of 738 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1100 MHz through a 256-bit bus. It also is made up of 128 SPUs, 64 TAUs, and 16 ROPs.

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

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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 will be 450% faster than the Radeon HD 5450 in general, due to its higher data rate. (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 a lot (more or less 808%) faster with regards to 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 using lots of anti-aliasing is important to you, then the GeForce GTS 250 1GB is a better choice, by a large margin. (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

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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