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GeForce GTS 250 1GB vs Radeon HD 5450


Intro

The GeForce GTS 250 1GB makes use of a 65/55 nm design. nVidia has set the core frequency at 738 MHz. The GDDR3 memory works at a speed of 1100 MHz on this specific model. It features 128 SPUs along with 64 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 5450, which uses a 40 nm design. AMD has clocked the core frequency at 650 MHz. The DDR3 memory runs at a frequency of 800 MHz on this particular model. It features 80(16x5) SPUs as well as 8 TAUs 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 quite a bit faster than the Radeon HD 5450 in general. (explain)

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

Texel Rate

The GeForce GTS 250 1GB is a lot (about 808%) better at texture 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 superior to the Radeon HD 5450, by far. (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 max amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better 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 most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max 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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