Building a password cracking machine

[Crackattack]

I'm looking to build a high end cracking machine
I've 25,000 available to spend

I was thinking to build a machine with a dual xeon cpu motherboard with the two E7 xeons and 4 titan x's in sli 

Here's my question while 4 titan x's don't really make a super crazy cracking machine if I had more money
How many titan x's would it take to crack any passwords up to 12-16 characters with capitals /characters / numbers etc with brute force type attack with the process only taking an hour or two

[rico]

If you don't know enough about hashcat to know not to use SLI - and also not specify what hash type you even intend on cracking then I'm not sure you should be building a 25K cracking rig...

I think you should either give up (len 12 can be a formidable keyspace) or buy a pre-built rig like Saggita make, e.g. https://sagitta.pw/

[Crackattack]

Yea I'm aware sli isn't the best way, I'm asking how many gpu could you put on a setup like brutalis 8 gpu doesn't sound much

Would 20 gpu be able a crack 90 percent of user passwords on the net

[rico]

Yea I'm aware sli isn't the best way,  I'm asking how many gpu could you put on a setup like brutalis 8 gpu doesn't sound much

No idea.

Would 20 gpu be able a crack 90 percent of user passwords on the net

No. You could provide more info like I asked in my first post but the answer is still no.

[inprivate]

do you think about two or more Pro duo CF system?

[atom]

Yea I'm aware sli isn't the best way,  I'm asking how many gpu could you put on a setup like brutalis 8 gpu doesn't sound much

You can not do 20 GPU on a single motherboard. It's easier to have many GPU on many computer and then bundle them over network.

[kiara]

How many titan x's would it take to crack any passwords up to 12-16 characters with capitals /characters / numbers etc with brute force type attack with the process only taking an hour or two

lets start with,
gtx 1080 cost less than titan x and perform better.
so u should go with them.

next thing,
it depend on what alogirthim is being use..
a simple example,
8 gtx 1080 have the power to crack 200.3 GH/s  per sec

lower case (26) + upper case (26) + num (10) + special char only !@#$%^&*()_+-= (14) = 76 power 12 is 
37133262473195501387776 possibility , now do the math how long that will take u  with 200Gh/s  
(185666312365.977 second +-)

[inprivate]

How many titan x's would it take to crack any passwords up to 12-16 characters with capitals /characters / numbers etc with brute force type attack with the process only taking an hour or two

lets start with,
gtx 1080 cost less than titan x and perform better.
so u should go with them.

next thing,
it depend on what alogirthim is being use..
a simple example,
8 gtx 1080 have the power to crack 200.3 GH/s  per sec

lower case (26) + upper case (26) + num (10) + special char only !@#$%^&*()_+-= (14) = 76 power 12 is 
37133262473195501387776 possibility , now do the math how long that will take u  with 200Gh/s  
(185666312365.977 second +-)

about 5887 years

[disco]

It's been awhile since I took basic algebra, but it would seem 76^12/25x=72000 seconds gives you the number of cards you need.  If I did the math correctly you only need around 200 Quadrillion gtx 1080 cards to brute force 12 character hashes in 2 hours. So with GTX 1080 cards being around $700 today, you only need around 140 Quintillion dollars worth of GPUs.[/color]

How many titan x's would it take to crack any passwords up to 12-16 characters with capitals /characters / numbers etc with brute force type attack with the process only taking an hour or two

lets start with,
gtx 1080 cost less than titan x and perform better.
so u should go with them.

next thing,
it depend on what alogirthim is being use..
a simple example,
8 gtx 1080 have the power to crack 200.3 GH/s  per sec

lower case (26) + upper case (26) + num (10) + special char only !@#$%^&*()_+-= (14) = 76 power 12 is 
37133262473195501387776 possibility , now do the math how long that will take u  with 200Gh/s  
(185666312365.977 second +-)

about 5887 years

[atom]

Don't forget the power consumption