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07-15-2012, 06:50 AM
(This post was last modified: 07-15-2012, 06:56 AM by dmnd.)
Hello everyone,
Browsing the hardware forum, I have been unable to find a thread that suits my needs. I'm looking to build a machine -- which GPU should I purchase? How many should I purchase? 6900? 7970?
I'll spend $1500. Is this a good price point? I'm willing to spend up to $2000. What can I purchase with this? Is there anywhere I can receive information that lists the exact hardware to buy?
This machine will be used to crack MD5.
Thank you in advance
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Buy 4xhd7990 when available.
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07-15-2012, 11:41 AM
(This post was last modified: 07-15-2012, 11:42 AM by dmnd.)
(07-15-2012, 08:44 AM)K9 Wrote: Here:
https://golubev.com/gpuest.htm
https://www.gat3way.eu/est.php
Thanks for the links, very helpful!
(07-15-2012, 10:08 AM)Mem5 Wrote: Buy 4xhd7990 when available.
I was reading about 7990 before I posted the thread, hopefully they release it in august. With 4 of those, do you have a estimate at how many it can crack per second? I read in another thread on here that 2x7990 is ~35 billion hashes a second? Is that true?
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dual gpu cards clock lower, alot is depending on this. so it will be more like 30 billion/s on md5 with -lite.
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07-16-2012, 10:12 PM
(This post was last modified: 07-16-2012, 10:13 PM by forumhero.)
if they made desktop motherboards with 8 pcie slots than definitely 8xhd7970 than say 4xhd7990. not to mention you'd have to build a custom case using pcie raiser cables, multiple power supply, etc.. can get complicated. the biggest advantage with four dual gpu cards is that you can fit them in a standard full size ATX case using a single high wattage PSU without any customization. the trade off is it won't be as fast.
on a related note, i've been reading of bitcoin miners making the switch to FPGA from GPUs. mainly due to significant cost savings on power since they run their boxes 24/7. if you plan on a lot of hash cracking and will be running your computer 24/7, then perhaps it might be an option for you. of course you'd have to look for another app that support FPGA and the hash algorithm you want to crack.
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there is no such thing, for good reasons. it might work for simple incrementing generators as in SL3 or bitcoins but not like with complex stuff like rule-engines. this might change if they actually release an OpenCL runtimes like altera announced recently, but currently.. no..
