Remember, mtrlt released to the public the *demo* version, aka slow version. This version was just to prove Scrypt is more efficient on a gpu than it is on a cpu.
Using dishwara's numbers from that screenshot (219kh/s), and an estimated 5870 power consumption of 188w, that makes for 1.16kh/w.
Using data from the litecoin wiki it seems a top of the line cpu gets 25kh/s at 125w, that makes for 0.2kh/w.
Being generous, and assuming the litecoin wiki is out of date, and using poolers latest miner, lets just give the cpu 50kh/s at the same 125w, that is still only 0.4kh/w.
Scrypt is *not* gpu unfriendly.
BTW, the current private version of Reaper is getting over 2kh/w when mining scrypt.
I'd like to see some wattage from the wall numbers paired with the various miners results, along with versions of drivers & miners.
The WAGS being tossed about here suggest somewhere between a 100% - 400% gain for using scrypt on GPU over CPU.
Here is another WAG:
A 5870 boasts 2,720 GFLOPS (and I don't know how many integer calcs/sec)
According to export classification docs @
http://download.intel.com/support/processors/corei7ee/sb/core_i7-900_d_x.pdf A single core (if I am reading it right) of i7-990x can do 90Gflops. So 4 cores could do 360Gflops for 60% of the power consumption of a 5870.
So FLOP for FLOP a 5870 is about 3-4 times as efficient with FLOPS as a i7-990x system. That dovetails nicely with the reaper miner claims of 3-4 times as efficient on GPU.
Now AFAIK scrypt uses only integer calcs, which means the preceding numbers are not very relevant. But it seems more like scrypt is neutral rather than hostile to one platform or the other. Also, when considering using the GPU for LTC, you need to compare LTC vs BTC mining profit potential. When using CPU, you need only consider doing LTC mining with it since GPU mining for BTC is completely pointless.
I still see no evidence and certainly no proof that Artforz & Coblee created a super efficient miner for LTC.
. Such a douche. You should be banned from this forum.
