Thanks, I am running some tests on your latest Win 64 miner now with various AMD drivers on four R9 280x AMDs.  I'll report back later.

That's for HD7990, dual Tahiti, downvolted and downclocked to 850/1250. I have no HD7950, though most people o/c them from 800/1250 to 1000/1500 or higher where they perform like a single GPU of my HD7990, so 350KH/s should be achievable. HD7970 (R9 280X) delivers 380 to 450KH/s depending on overclock and memory (Elpida sucks, Hynix wins).

Here's what I got with your new Windows 64 miner, all GPU voltages at 1.2, I used Sapphire HD 7970s (Hynix), and your recommended configuration:


I rebooted the rig between each test and deleted the existing .bin file.  I didn't use any type of driver cleaner utility.
I achieved the following after 5 minutes of mining from various AMD drivers when placed in your miner's folder:
------------------------------------------------------------------------------------------
AMD 15.7.1 (stock installation on rig):

[08:20:20] OCL0                | 5s:  0.0 avg:226.3 u:316.5 KH/s | A:24 R:0 HW:0 WU:18.1/m
[08:20:20] OCL1                | 5s:  0.0 avg:230.4 u:184.6 KH/s | A:14 R:0 HW:0 WU:10.6/m
[08:20:20] OCL2                | 5s:  0.0 avg:226.7 u:224.2 KH/s | A:17 R:0 HW:0 WU:12.8/m
[08:20:20] OCL3                | 5s:  0.0 avg:226.9 u:158.3 KH/s | A:12 R:0 HW:0 WU:9.1/m

------------------------------------------------------------------------------------------
AMD 14.12:

[08:29:23] OCL0                | 5s:  0.0 avg:239.2 u:228.7 KH/s | A:18 R:0 HW:0 WU:13.1/m
[08:29:23] OCL1                | 5s:  0.0 avg:239.4 u:282.5 KH/s | A:21 R:0 HW:0 WU:16.2/m
[08:29:23] OCL2                | 5s:  0.0 avg:239.2 u:228.7 KH/s | A:17 R:0 HW:0 WU:13.1/m
[08:29:23] OCL3                | 5s:  0.0 avg:239.6 u:336.3 KH/s | A:25 R:0 HW:0 WU:19.2/m

--------------------------------------------------------------------------------------------
AMD 14.9:

[08:13:28] OCL0                | 5s:  0.0 avg:379.2 u:459.8 KH/s | A:37 R:0 HW:0 WU:26.3/m
[08:13:28] OCL1                | 5s:  0.0 avg:378.2 u:410.1 KH/s | A:33 R:0 HW:0 WU:23.5/m
[08:13:28] OCL2                | 5s:  0.0 avg:378.6 u:360.4 KH/s | A:29 R:0 HW:0 WU:20.6/m
[08:13:28] OCL3                | 5s:  0.0 avg:378.4 u:298.2 KH/s | A:24 R:0 HW:0 WU:17.1/m

-------------------------------------------------------------------------------------------
AMD 14.7rc3:

[09:11:02] OCL0                | 5s:  0.0 avg:370.1 u:409.0 KH/s | A:31 R:0 HW:0 WU:23.4/m
[09:11:02] OCL1                | 5s:  0.0 avg:370.7 u:277.1 KH/s | A:21 R:0 HW:0 WU:15.9/m
[09:11:02] OCL2                | 5s:  0.0 avg:370.1 u:303.5 KH/s | A:23 R:0 HW:0 WU:17.4/m
[09:11:02] OCL3                | 5s:  0.0 avg:371.1 u:422.2 KH/s | A:32 R:0 HW:0 WU:24.2/m

--------------------------------------------------------------------------------------------
AMD 14.6:

[08:51:58] OCL0                | 5s:  0.0 avg:368.9 u:290.3 KH/s | A:22 R:0 HW:0 WU:16.6/m
[08:51:58] OCL1                | 5s:  0.0 avg:369.0 u:395.9 KH/s | A:30 R:0 HW:0 WU:22.7/m
[08:51:58] OCL2                | 5s:  0.0 avg:368.9 u:382.7 KH/s | A:29 R:0 HW:0 WU:21.9/m
[08:51:58] OCL3                | 5s:  0.0 avg:368.3 u:435.5 KH/s | A:33 R:0 HW:0 WU:24.9/m

--------------------------------------------------------------------------------------------
AMD 14.4:

[08:42:44] OCL0                | 5s:  0.0 avg:351.1 u:255.0 KH/s | A:19 R:0 HW:0 WU:14.6/m
[08:42:44] OCL1                | 5s:  0.0 avg:351.3 u:241.6 KH/s | A:18 R:0 HW:0 WU:13.8/m
[08:42:44] OCL2                | 5s:  0.0 avg:351.1 u:308.7 KH/s | A:23 R:0 HW:0 WU:17.7/m
[08:42:44] OCL3                | 5s:  0.0 avg:350.9 u:295.3 KH/s | A:22 R:0 HW:0 WU:16.9/m

--------------------------------------------------------------------------------------------

Okay, so that was for a rig of 4 HD 7970s, all Hynix memory.  Next I tested the 14.9 drivers on
4 Gigabyte Windforce R9 280x GPUs, all Elpida.  They wouldn't start with I 16, so I bumped them
down to I 15.

AMD 14.9 at I=15:

[09:36:18] OCL0                | 5s:  0.0 avg:374.0 u:284.6 KH/s | A:22 R:0 HW:0 WU:16.3/m
[09:36:18] OCL1                | 5s:361.6 avg:374.9 u:271.7 KH/s | A:21 R:0 HW:0 WU:15.5/m
[09:36:18] OCL2                | 5s:361.7 avg:374.0 u:323.5 KH/s | A:25 R:0 HW:0 WU:18.5/m
[09:36:18] OCL3                | 5s:361.4 avg:373.9 u:258.8 KH/s | A:20 R:0 HW:0 WU:14.8/m

That looks like comparable output for Hynix memory but at lower intensity.


==============================================================================

Now I will test Wolf0's neoscrypt.cl and .bin from the most recent Nicehash miner bin folder with sgminer-5-0-1, xI=2. gpu-threads=2, 1000/1500:


280x Elpida, with Wolf0's neoscrypt kernel with AMD 14.7rc3 drivers I get:

[09:53:00] GPU0                | (5s):403.8K (avg):424.4Kh/s | A:2496 R:0 HW:0 WU:403.230/m
[09:53:00] GPU1                | (5s):406.7K (avg):426.6Kh/s | A:2432 R:0 HW:0 WU:399.363/m
[09:53:00] GPU2                | (5s):406.3K (avg):425.7Kh/s | A:1728 R:0 HW:0 WU:253.722/m
[09:53:00] GPU3                | (5s):405.3K (avg):425.6Kh/s | A:2048 R:0 HW:0 WU:331.606/m


And going back to the HD7970 cards with 14.7rc3 drivers I get:

[09:57:30] GPU0                | (5s):407.0K (avg):417.7Kh/s | A:2368 R:0 HW:0 WU:373.366/m
[09:57:30] GPU1                | (5s):408.4K (avg):419.9Kh/s | A:2368 R:0 HW:0 WU:380.408/m
[09:57:30] GPU2                | (5s):410.5K (avg):419.4Kh/s | A:1856 R:0 HW:0 WU:291.159/m
[09:57:30] GPU3                | (5s):406.9K (avg):416.4Kh/s | A:2368 R:0 HW:0 WU:387.625/m


So, in summary, from the perspective of this dead-end user, it seems that for the moment Wolf0's kernel and .bin file from the most recent Nicehash miner bin folder and AMD 14.7rc3 drivers has the better hashrate.

Also, I cannot explain the apparent discrepancy in sgminer's accepted as compared to nsgminer's accepted.  I assume that there is a factor of 100 somewhere.

I haven't seen any real improvement on vector BLAKE2s, though I have added it as a feature.


Could you switch to vector code for Salsa and ChaCha to see if it makes a positive difference on GCN with the 15.x drivers?


FASTKDF_COMPACT 1 also seems to improve performance a little on GCN. Maybe SALSA_UNROLL_LEVEL and CHACHA_UNROLL_LEVEL are better if set to 3 like previously instead of 4.

let run longer for ghost miner you will get a very good perfomance

give me the kernel for test

Well, BLAKE2S_COMPACT is just an option which doesn't do any good now apart of reducing compiled kernel size. NSGminer is a fork of BFGminer v2.10.14 last updated 2 years ago. Although there was no ASIC related code which I would have to remove otherwise. There are also a few good things not found in CGminer/SGminer. I have rewritten many parts anyway to make it really work rather than just work. For example, SGminer displays incorrect block hashes, bogus network diff and the best share, share diff is inflated by 16, maybe solo mining is still broken. diff1 for NeoScrypt (and Scrypt, too) is 0.00024414 of the BTC diff1, that's nBits = 0x1E0FFFF0 big endian which gets decompressed to this uint256 target:

0000000000000000000000000000000000000000000000000000000FFFF00000x0

SGminer lost one most significant zero for some arcane reason. I guess it was also bad in the initial CGminer port to NeoScrypt. Divide this by a share hash/target to get the share diff. That's why all share diffs are 16x higher than actual.

I run NSGminer in lxterminal usually with a cron powered watchdog script, though I don't recall it crashing. Maybe it needs an update in this area to make X happy.

500KH/s on a reference R9 280X is nearly what I get now by optimising my v6 kernel. I think it can do more. That's for vector Salsa, ChaCha and BLAKE2s. Scalar are -10KH/s.



EDIT: Updated the screen shot with a longer run time.

ANN: If anyone wants NVIDIA OpenCL support in NSGminer with optimisations and hardware monitoring, donate to the addresses in the OP and post to this thread. The target is 0.5 BTC to cover the hardware cost at least.

However Scrypt wasn't compute bound without gapping, was it?

sent you 1500FTC tip. nice work!