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GeForce GTS 250 512MB vs Radeon HD 6570 (OEM) 1GB

Intro

The GeForce GTS 250 512MB makes use of a 65/55 nm design. nVidia has clocked the core speed at 738 MHz. The GDDR3 memory is set to run at a speed of 1100 MHz on this particular model. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 6570 (OEM) 1GB, which has clock speeds of 650 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 RAM. It features 480 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB 50 Watts
GeForce GTS 250 512MB 145 Watts
Difference: 95 Watts (190%)

Memory Bandwidth

The GeForce GTS 250 512MB should in theory be much faster than the Radeon HD 6570 (OEM) 1GB overall. (explain)

GeForce GTS 250 512MB 70400 MB/sec
Radeon HD 6570 (OEM) 1GB 28800 MB/sec
Difference: 41600 (144%)

Texel Rate

The GeForce GTS 250 512MB should be a lot (more or less 203%) faster with regards to texture filtering than the Radeon HD 6570 (OEM) 1GB. (explain)

GeForce GTS 250 512MB 47232 Mtexels/sec
Radeon HD 6570 (OEM) 1GB 15600 Mtexels/sec
Difference: 31632 (203%)

Pixel Rate

The GeForce GTS 250 512MB will be much (approximately 127%) better at full screen anti-aliasing than the Radeon HD 6570 (OEM) 1GB, and able to handle higher resolutions without slowing down too much. (explain)

GeForce GTS 250 512MB 11808 Mpixels/sec
Radeon HD 6570 (OEM) 1GB 5200 Mpixels/sec
Difference: 6608 (127%)

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

GeForce GTS 250 512MB

Amazon.com

Radeon HD 6570 (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

Model GeForce GTS 250 512MB Radeon HD 6570 (OEM) 1GB
Manufacturer nVidia AMD
Year March 3, 2009 February 2011
Code Name G92a/b Turks
Fab Process 65/55 nm 40 nm
Bus PCIe x16 2.0 PCIe 2.1 x16
Memory 512 MB 1024 MB
Core Speed 738 MHz 650 MHz
Shader Speed 1836 MHz (N/A) MHz
Memory Speed 1100 MHz (2200 MHz effective) 900 MHz (1800 MHz effective)
Unified Shaders 128 480
Texture Mapping Units 64 24
Render Output Units 16 8
Bus Type GDDR3 GDDR3
Bus Width 256-bit 128-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1
Power (Max TDP) 145 watts 50 watts
Shader Model 4.0 5.0
Bandwidth 70400 MB/sec 28800 MB/sec
Texel Rate 47232 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 5200 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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