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GeForce GTX 650 Ti vs Radeon HD 6870

Intro

The GeForce GTX 650 Ti features a GPU core clock speed of 928 MHz, and the 1024 MB of GDDR5 RAM is set to run at 1350 MHz through a 128-bit bus. It also is comprised of 768 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare all of that to the Radeon HD 6870, which has core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 1120 SPUs along with 56 TAUs and 32 ROPs.

Display Graphs

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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

GeForce GTX 650 Ti 3430 points
Radeon HD 6870 2870 points
Difference: 560 (20%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 110 Watts
Radeon HD 6870 151 Watts
Difference: 41 Watts (37%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6870 should in theory be a lot better than the GeForce GTX 650 Ti in general. (explain)

Radeon HD 6870 134400 MB/sec
GeForce GTX 650 Ti 86400 MB/sec
Difference: 48000 (56%)

Texel Rate

The GeForce GTX 650 Ti should be just a bit (approximately 18%) more effective at anisotropic filtering than the Radeon HD 6870. (explain)

GeForce GTX 650 Ti 59392 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 8992 (18%)

Pixel Rate

The Radeon HD 6870 should be a lot (more or less 94%) faster with regards to FSAA than the GeForce GTX 650 Ti, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GTX 650 Ti 14848 Mpixels/sec
Difference: 13952 (94%)

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 GTX 650 Ti

Radeon HD 6870

Specifications

Display Specifications

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Model GeForce GTX 650 Ti Radeon HD 6870
Manufacturer nVidia AMD
Year October 2012 October 2010
Code Name GK106 Barts XT
Memory 1024 MB 1024 MB
Core Speed 928 MHz 900 MHz
Memory Speed 5400 MHz 4200 MHz
Power (Max TDP) 110 watts 151 watts
Bandwidth 86400 MB/sec 134400 MB/sec
Texel Rate 59392 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 768 1120
Texture Mapping Units 64 56
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 2540 million 1700 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher 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 most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce GTX 650 Ti

Radeon HD 6870

Comments

2 Responses to “GeForce GTX 650 Ti vs Radeon HD 6870”
Tom Hanners says:

I wonder how Nvidia can take a 128 Bit Mem bus card, And then make it completely outclass other AMD cards with a 256 bit bus? I thought their 128 Bit bus cards were junk I even used to laugh at them, Then my ATI 5870 fried, And I then bought a GTX-650_Ti on sale for $90 bucks, And was completly shocked by its performance. It completely outperforms my old ATI 5870 in all my games old and new, I can never go back to AMD now. (unless of'course I get a good deal) I never pass up a good deal.

Bleh says:

I just bought a gtx 650 ti 2gb edition, I'm liking it much better than my HD 7770 so far. I wanted to go smaller, silent and less power consumption. That's exactly what I got out of the gtx 650 nicely done Nvidia. Keep this track record and you might even get me to stop using ATI period.

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