Quote from: WindMaster on June 25, 2014, 02:38:59 AM

Quote from: btc-mike on June 25, 2014, 12:48:52 AM

A few people told me to check YACoin again to add to CPU Coin List since the difficulty made GPU mining much harder. Is that true?

I believe the spread is quite a bit less than the 10x cutoff for your CPU Coin List. There aren't a lot of details on your website about exactly which CPU vs. which GPU would be use to make that calculation. Given that all of my GPUs have insufficient RAM to mine YAC efficiently at the current value of N, I'm unable to provide GPU hash rates, but I'm sure a few people with 3GB and 4GB cards will weigh in with their current rates.

For comparison, note that the CPU hash rate table I posted on the first page of this thread was fairly old hardware, an IBM blade server with 2x Xeon E5450's (each is basically a 3GHz Core2 Quad), yielding about 187 hash/sec at the current value of N. Majority of desktop PC's have processors faster than that blade server. A 2x E5450 server has a Passmark score of about 7778:

Dual E5450:
http://cpubenchmark.net/cpu.php?cpu=Intel+Xeon+E5450+%40+3.00GHz&id=1236&cpuCount=2

An i7-2600k was for a long time the happy medium for people to balance price vs performance on desktop PC's, with a Passmark score of 8597, but is getting a bit "long in the teeth" these days:
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-2600K+%40+3.40GHz

Something like an i7-4770k would probably be more typical today, at a Passmark score of 10299:
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-4770K+%40+3.50GHz

So, looking at my old CPU hash rate table, for today's PC's, it would probably be in the ballpark to approximate CPU mining as between 1.1x to 1.32x faster than the table I posted for a typical new PC. Minor variations will occur due to memory speed and cache configuration in the specific CPU type, of course.

That old CPU hash rate table I posted was at:
https://bitcointalk.org/index.php?topic=206577.msg2162620#msg2162620

The GPU Advantage scores are based on R9 280x and an AMD FX-8320. I chose these two because the R9 280X is fairly common and has been easy to find published numbers. CPU hash-rate numbers are more elusive so I test on my desktop.

Of course, there are a few problems with this approach. Some coins have faster ATI GPU hash rates. The FX-8320 is slower than the new Haswell chips. Some CPU mining apps take advantage of the Haswell's AVX3 instruction set.

I can test the CPU and get a number, but I still need published GPU numbers.