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Radeon HD 6570 (OEM) 2GB vs Radeon HD 7750

Intro

The Radeon HD 6570 (OEM) 2GB has a GPU core clock speed of 650 MHz, and the 1024 MB of GDDR5 memory is set to run at 1000 MHz through a 128-bit bus. It also features 480 SPUs, 24 TAUs, and 8 ROPs.

Compare all that to the Radeon HD 7750, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB 50 Watts
Radeon HD 7750 55 Watts
Difference: 5 Watts (10%)

Memory Bandwidth

The Radeon HD 7750, in theory, should perform just a bit faster than the Radeon HD 6570 (OEM) 2GB overall. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 6570 (OEM) 2GB 64000 MB/sec
Difference: 8000 (13%)

Texel Rate

The Radeon HD 7750 is much (approximately 64%) more effective at texture filtering than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon HD 7750 25600 Mtexels/sec
Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Difference: 10000 (64%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7750 is a better choice, and very much so. (explain)

Radeon HD 7750 12800 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 7600 (146%)

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

Radeon HD 6570 (OEM) 2GB

Amazon.com

Radeon HD 7750

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 Radeon HD 6570 (OEM) 2GB Radeon HD 7750
Manufacturer AMD AMD
Year February 2011 February 2012
Code Name Turks Cape Verde Pro
Fab Process 40 nm 28 nm
Bus PCIe 2.1 x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 650 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1000 MHz (4000 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 480 512
Texture Mapping Units 24 32
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 50 watts 55 watts
Shader Model 5.0 5.0
Bandwidth 64000 MB/sec 72000 MB/sec
Texel Rate 15600 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 5200 Mpixels/sec 12800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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