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Home - Wireless Cracking - is there much of a speed difference between 4gb and 8gb gpu?


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frenchy1

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Mon, 13 Feb 2017 @ 09:29:23

any one know if there much of a speed difference between 4gb and 8gb gpu's?



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Gort

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Mon, 13 Feb 2017 @ 10:11:17

frenchy1 said:

any one know if there much of a speed difference between 4gb and 8gb gpu's?

I would say it depends on what you are trying to do with them.

For something like WPA, which is fundamentally just doing SHA1, the answer
is probably no, because that is a GPU bound problem and needs very little GPU
memory.

In fact, I have my GPU BIOS tweaked to run the RAM as slow as possible
for this kind of task, locked down to around 150MHz in most cases.
Almost zero impact on WPA speed, but find a good reduction in both
waste heat and power consumption for many cards.

However, if you are trying to run an algorithm that is memory hard, like scrypt,
or neoscrypt, then the extra RAM on the 8GB GPU will give you a significant
increase in performance.


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judithxx

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Mon, 13 Feb 2017 @ 11:09:49

What is the biggest thing to look for in a fast card then? If ram isn't that important (at least on wpa).


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blandyuk
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Mon, 13 Feb 2017 @ 11:13:41

You want as much speed using the least amount of power (watts).

The only cards you need to look at are the GTX 1070, GTX 1080 and the massive GTX Titan X Pascal (2016).


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