It has long been known, that graphics cards offer much better performance, than processors. Вам интересно на что способны четыре видеокарты GeForce GTX 1070?
Для чего можно использовать четыре видеокарты GeForce GTX 1070? Followers PCMasterRace philosophy, probably immediately think of a powerful computer for games. Netmux blog author filed a slightly different idea - he created a workstation, which allows you to crack passwords on websites.
Passwords on websites are not stored in the standard form, because in case of theft of the user base, These data would be easily accessible to thieves. Usually, used encryption algorithms (one of the more popular is the MD5), which allows secure user database in case of data leakage - simply put, calculated on the basis of a password called a hash, and that it is stored in the user database, while the entrance is compared to the password hash, stored in the database, and user input.
It is important to note, that the one-way hash function, so you can not uniquely specify a password, having hash - at least in theory,, because there are ways to calculate a hash based on the password, but they require very high computing power. To the aid of graphics cards, which offer much better performance than processors, so use them to crack passwords.
Netmux blog author has set himself the task – создание рабочей станции за 5000 dollars, which allow the most effective way to crack MD5 hashes. To that end, I bought the following items:
- motherboard SuperMicro X10DRG-Q + building SuperMicro SYS-7048GR-TR 4U - 1989,99 dollars;
- two processors Intel Xeon E5-2620 v3, 2,4 GHz, Larga 2011-3 85 AT – 469,98 dollars;
- four video cards Nvidia GeForce GTX 1070 Founders Edition – $1737,14 dollars;
- four memory modules Kingston ValueRAM Server DDR4, 2133 MHz, 16 GB - $ 391,96;
The entire platform is working with the support of the Ubuntu OS 14.0.4.5, drivers Intel OpenCL Runtime 16.1 x64 и Nvidia-Linux-x86_64 375.20. Password cracking software is used Hashcat v3.20.
Данная конфигурация обеспечивает производительность 76526,9 MH / s MD5, which means, что он подбирает хэши MD5 со скоростью более 76,5 billions of queries per second. As a result, the password consists of 10 characters(lower case letters or digits) Station pick up for around 14 hours, but when it comes to 10-character password, which consists of the digits and the small and large letters that need to 20 years old.
at full load station is heated to 83 degrees centigrade and consumes 820 wattA source: Furniture Veres
