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GeForce GTX 650 vs Radeon HD 7870

Intro

The GeForce GTX 650 features clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Compare that to the Radeon HD 7870, which comes with a clock speed of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7870 6230 points
GeForce GTX 650 2263 points
Difference: 3967 (175%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 7870 175 Watts
Difference: 111 Watts (173%)

Memory Bandwidth

In theory, the Radeon HD 7870 should be 92% quicker than the GeForce GTX 650 in general, due to its greater bandwidth. (explain)

Radeon HD 7870 153600 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 73600 (92%)

Texel Rate

The Radeon HD 7870 should be quite a bit (more or less 136%) faster with regards to anisotropic filtering than the GeForce GTX 650. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 46144 (136%)

Pixel Rate

The Radeon HD 7870 is a lot (approximately 89%) faster with regards to FSAA than the GeForce GTX 650, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7870 32000 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 15072 (89%)

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 650

Amazon.com

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Radeon HD 7870

Amazon.com

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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 650 Radeon HD 7870
Manufacturer nVidia AMD
Year September 2012 March 2012
Code Name GK107 Pitcairn XT
Memory 1024 MB 2048 MB
Core Speed 1058 MHz 1000 MHz
Memory Speed 5000 MHz 4800 MHz
Power (Max TDP) 64 watts 175 watts
Bandwidth 80000 MB/sec 153600 MB/sec
Texel Rate 33856 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 384 1280
Texture Mapping Units 32 80
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 2800 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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

Display Prices

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GeForce GTX 650

Amazon.com

Check prices at:

Radeon HD 7870

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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