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82141 H/s max for r9 270?

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82141 H/s max for r9 270?
christianrodher Offline
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#1
06-20-2015, 06:19 AM
Is 82141 H/s max for SAPPHIRE R9 270 2GB?

oclHashcat v1.36 starting in benchmark-mode...

Device #1: Pitcairn, 2048MB, 945Mhz, 20MCU

Hashtype: WPA/WPA2
Workload: 1024 loops, 32 accel



Session.Name...: oclHashcat
Status.........: Running
Input.Mode.....: Mask (?b?b?b?b?b?b?b) [7]
Hash.Target....: hashcat.net (00:00:00:00:00:00 <-> 00:00:00:00:00:00)
Hash.Type......: WPA/WPA2
Time.Started...: Sat Jun 20 00:17:07 2015 (11 secs)
Time.Estimated.: > 10 Years
Speed.GPU.#1...: 82141 H/s
Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.......: 942080/72057594037927936 (0.00%)
Rejected.......: 0/942080 (0.00%)
HWMon.GPU.#1...: 99% Util, 49c Temp, 20% Fan

[s]tatus [p]ause [r]esume [b]ypass [q]uit => Speed.GPU.#1.: 82546 H/s

Started: Sat Jun 20 00:17:07 2015
Stopped: Sat Jun 20 00:17:22 2015
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epixoip Offline
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#2
06-20-2015, 07:00 AM
Looks about right to me
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christianrodher Offline
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#3
06-20-2015, 04:06 PM (This post was last modified: 06-20-2015, 04:07 PM by christianrodher.)
(06-20-2015, 07:00 AM)epixoip Wrote: Looks about right to me

Im new to this. if I add another card will it be 82141x2? or the increase in speed doesnt work like that?

How many gpu card will i need to bruteforce a WPA of 10 hex characters (ABCDEF0123456789) in 1-2 days? atm it takes me 163 days, 3 hours with only 1 r9 270.
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Rolf Offline
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#4
06-20-2015, 04:24 PM (This post was last modified: 06-20-2015, 04:27 PM by Rolf.)
(06-20-2015, 04:06 PM)christianrodher Wrote:
(06-20-2015, 07:00 AM)epixoip Wrote: Looks about right to me

Im new to this. if I add another card will it be 82141x2? or the increase in speed doesnt work like that?

How many gpu card will i need to bruteforce a WPA of 10 hex characters (ABCDEF0123456789) in 1-2 days? atm it takes me 163 days, 3 hours with only 1 r9 270.
For brute force attacks, when there's enough workload (16^10 is perfectly fine), the speed scales nicely, so yeah, if you'll add another R9 270, you'll get twice the speed.

Basic math for the task:
16^10 / 82141x = 86400
x ≈ 155
So, you'll need 155 R9 270s to get the job done in a day, twice less for 48 hours.
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undeath Offline
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#5
06-20-2015, 04:25 PM
combinations: 1099511627776
necessary c/s to crack in two days: 1099511627776/60/60/24/2 = 6362914.5

a Nvidia Titan X archives ~315 kH/s (according to this benchmark: https://gist.github.com/epixoip/63c2ad11baf7bbd57544) => you need 20 Titan X for this BF to run in two days.
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