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Posted by on Aug 20, 2012 in Hardware News | 1 comment

NVIDIA GeForce GTX 660 Ti: 2GB vs 3GB

NVIDIA GeForce GTX 660 Ti: 2GB vs 3GB

Last week launched its anticipated GeForce GTX 660 Ti , GPU which debuted with a curious yet confusing configuration of 2GB of graphics memory (also available in editions with 3GB) and a 192-bit bus. From Inpai we get a review done by comparing both editions Computerbase in a very comprehensive test battery comprising a total of 15 games (plus Inpai brings us a review of the edition with 2GB testing with 20 games).

The memory controller of the GTX 660 Ti
Nvidia customary for some time memory chips mix various capacities on their video cards, an example is the GeForce GTX 550 Ti, which has 1GB despite having a 192-bit bus, which manages configuration using four chips 128MB and two 256MB.

It was expected that the GeForce 2GB using four chips had 256MB and two 512MB, but instead uses eight 256MB chips, which is why many think that uses a 256-bit bus, but Nvidia actually hit two memory chips in two of its memory controllers (the GTX 660 Ti has a 192-bit bus consists of three controllers dual channel memory, each able to manage two memory chip 32-bit), those who work interleaved.

This curious arrangement makes it possible to use a 192-bit bus (144GB/s) for the first 1.5GB of graphics memory, while the 512MB recent hits are made to 64 bits (48GB/s), which in theory mean a huge bottleneck for the GPU, not present bottleneck in editing with 3gb of graphics memory, which uses 12 chips of 256MB, so its memory accesses 144GB/s on all occasions.

2GB vs 3GB
In theory, the GeForce GTX 660 Ti 3GB should have a much higher yield than your sister with 2GB, especially in intensive games that demand more than 1.5GB of memory. Here some of the evidence:

NVIDIA GeForce GTX 660 Ti: 2GB vs 3GB image 2

On average editing performance with 3GB 1% owns more than 2GB of her sister, but not always the average result reflects the results of the individual tests, because in very demanding games like Metro 2033 with 3GB edition surpasses between 9% to 18.75% for the 2GB version with 2560 X 1600 resolution with filters 4xAA/4XSSAA and 16xAF, a huge difference is not reflected in the average result.

NVIDIA GeForce GTX 660 Ti: 2GB vs 3GB image 3

We recommend reviewing the full reviews and Inpai Computerbase.

Links:
Test: Nvidia GeForce GTX 660 Ti (Computerbase)
选3GB还是2GB?不同显存GTX660Ti实测 (Inpai)
20款游戏超详考验!GTX660Ti首发评测 (Inpai)

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1 Comment

  1. Thank you. Been waiting for a review that did 2GB vs 3GB