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GeForce GTS 250 1GB vs Radeon HD 6670 (OEM) 1GB

Intro

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

Compare those specs to the Radeon HD 6670 (OEM) 1GB, which features a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also features 480 Stream Processors, 24 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB 63 Watts
GeForce GTS 250 1GB 145 Watts
Difference: 82 Watts (130%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 250 1GB should perform a little bit faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

GeForce GTS 250 1GB 70400 MB/sec
Radeon HD 6670 (OEM) 1GB 64000 MB/sec
Difference: 6400 (10%)

Texel Rate

The GeForce GTS 250 1GB should be much (about 146%) faster with regards to anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

GeForce GTS 250 1GB 47232 Mtexels/sec
Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
Difference: 28032 (146%)

Pixel Rate

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

GeForce GTS 250 1GB 11808 Mpixels/sec
Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
Difference: 5408 (85%)

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 6670 (OEM) 1GB

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 6670 (OEM) 1GB
Manufacturer nVidia AMD
Year March 3, 2009 February 2011
Code Name G92a/b Turks
Memory 1024 MB 1024 MB
Core Speed 738 MHz 800 MHz
Memory Speed 2200 MHz 4000 MHz
Power (Max TDP) 145 watts 63 watts
Bandwidth 70400 MB/sec 64000 MB/sec
Texel Rate 47232 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 128 480
Texture Mapping Units 64 24
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 715 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 processed per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels the video card could 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 speed of the card. ROPs (Raster Operations Pipelines - aka 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 potential to get to the maximum fill rate.

Comments

2 Responses to “GeForce GTS 250 1GB vs Radeon HD 6670 (OEM) 1GB”
Anonymous says:

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