Time frame to crack 8 character md5 hashes

[chris99]

What kind of time frame am I looking at to crack an 8 character md5 hash against a rainbow table? (1 GPU card, 7970)

Would 32GB vs. 64 vs. 96 Ram make a huge difference?

Would 7200RPM drives vs. say 4 512GB SSD in a raid 0 array have a huge differnce? Also how about hardware raid, vs. software raid?

Thanks

[Bitweasil]

It's about 30-60 seconds total candidate hash generation/chain regen.

The RAM won't make a difference, though you could make some larger indexes to improve search performance slightly.

SSDs would make a HUGE difference. I've not had a chance to benchmark on it, but they'll make a huge speed improvement. If you get some, let me know...

[chris99]

It's about 30-60 seconds total candidate hash generation/chain regen.

Awesome, so going through say 100 hashes could easily be done in a day (under a few hours)?

[Bitweasil]

With SSDs? Absolutely.

Without them? Depends on your disk array.

[chris99]

With SSDs? Absolutely.

Without them? Depends on your disk array.

Say its a single 2TB 7200RPM sata drive, what would I be looking at?

[Bitweasil]

Say its a single 2TB 7200RPM sata drive, what would I be looking at?

Probably 150-200 hashes per second search rate, so (200000 / 200) = 1000 seconds per hash, is around 17 minutes per hash, table search time.

100 hashes, 17 minutes, around 28 hours.

SSDs would drop this substantially, and that's the point of WebTables, but there hasn't been enough interest to justify SSDs yet.