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GeForce GTS 250 1GB vs Radeon HD 5670

Intro

The GeForce GTS 250 1GB features a core clock speed of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also uses a 256-bit bus, and uses a 65/55 nm design. It is comprised of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon HD 5670, which has GPU clock speed of 775 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 400(80x5) Stream Processors, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
GeForce GTS 250 1GB 145 Watts
Difference: 84 Watts (138%)

Memory Bandwidth

As far as performance goes, the GeForce GTS 250 1GB should theoretically be a small bit better than the Radeon HD 5670 overall. (explain)

GeForce GTS 250 1GB 70400 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 6400 (10%)

Texel Rate

The GeForce GTS 250 1GB is quite a bit (approximately 205%) faster with regards to texture filtering than the Radeon HD 5670. (explain)

GeForce GTS 250 1GB 47232 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 31732 (205%)

Pixel Rate

The GeForce GTS 250 1GB will be quite a bit (approximately 90%) faster with regards to FSAA than the Radeon HD 5670, and should be able to handle higher screen resolutions better. (explain)

GeForce GTS 250 1GB 11808 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 5608 (90%)

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 5670

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 5670
Manufacturer nVidia AMD
Year March 3, 2009 January 14, 2010
Code Name G92a/b Redwood XT
Memory 1024 MB 1024 MB
Core Speed 738 MHz 775 MHz
Memory Speed 2200 MHz 4000 MHz
Power (Max TDP) 145 watts 61 watts
Bandwidth 70400 MB/sec 64000 MB/sec
Texel Rate 47232 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 128 400(80x5)
Texture Mapping Units 64 20
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 40 nm
Transistors 754 million 627 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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 can be applied per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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

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