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GeForce GTX 285 1GB vs Radeon HD 7770

Intro

The GeForce GTX 285 1GB features core speeds of 648 MHz on the GPU, and 1242 MHz on the 1024 MB of GDDR3 RAM. It features 240 SPUs along with 80 Texture Address Units and 32 ROPs.

Compare all that to the Radeon HD 7770, which has core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 124 Watts (155%)

Memory Bandwidth

The GeForce GTX 285 1GB should theoretically be a lot faster than the Radeon HD 7770 overall. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 86976 (121%)

Texel Rate

The GeForce GTX 285 1GB will be a lot (more or less 30%) faster with regards to anisotropic filtering than the Radeon HD 7770. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 11840 (30%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 285 1GB is a better choice, by a large margin. (explain)

GeForce GTX 285 1GB 20736 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 4736 (30%)

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 GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 7770

Amazon.com

Check prices at:

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 GTX 285 1GB Radeon HD 7770
Manufacturer nVidia AMD
Year January 15, 2009 February 2012
Code Name G200b Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 648 MHz 1000 MHz
Memory Speed 2484 MHz 4500 MHz
Power (Max TDP) 204 watts 80 watts
Bandwidth 158976 MB/sec 72000 MB/sec
Texel Rate 51840 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 240 640
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 1500 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, 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 maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 7770

Amazon.com

Check prices at:

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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