Quote from: Puffy23 on January 17, 2017, 03:26:34 AM

Ok, I know I'm a few days late but I finally have the numbers for the Sapphire Fury Nitros I promised last Thursday/Friday. I was dragging my feet after Claymore hinted that v11.1 would include compatibility for asm with the 16.11.3 driver set. I busied myself tweaking my eco rom for 16.11.3 which appears to have been wasted effort. The implication being that I am unsatisfied with the performance of the "eco" rom, but will post the data with the caveat that I strongly believe there is room for improvement (and will work on further tweaks this week).

Disclaimer: This rig has several components that are overkill. I have plenty of 'computer crap' collecting dust so I don't hesitate to grab things that work. I guess I'm pleading that I don't have to waste time responding to posts about how i5s are stupid and/or PSU density is a waste of money.

CPU: i5 4570
MB: ASRock H81 Pro BTC R2.0
RAM: 8GB G.Skill Ripjaws X series DDR3 1600 Mhz
PSU: EVGA 1600 G2 (PSU1) & EVGA 1300 G2 (PSU2)
HDD: 128GB SSD with 20GB virtual memory
OS: Windows 10 Pro
GPU: x6 Sapphire R9 Fury Nitro 100379NTOC+SR
Risers: x5 Version 6 USB 3.0 PCIE Riser 1x to 16x
Riser: x1 Shielded 16x Riser Ribbon
Driver: Radeon Software Version: 15.12
Cooling: x4 Noctua NF-F12 IPPC 3000 (blowing on cards)
Cooling: x2 Corsair SP120 High Performance Edition (blowing on MB)

Configuration:
PSU1 - 3 Cards, 2 Risers, MB (including ribbon riser for the 3rd card), CPU, HDD, Fans
PSU2 - 3 Cards, 3 Risers

Required Info: The kilowatt meter on the left is PSU1. The kilowatt meter on the right is PSU2. Each GPU was delivered to the door for $271.81/GPU.

RESULTS

Bone Stock
1050/500

Hashrate: 2,503 H/s
Power: 1,657 W at the wall.

Analysis: Each card is drawing 271.33 W from the wall and producing 417.16 H/s. The system is drawing a measly 30 W (the Noctuas are basically just idling).

H/W = 1.54
H/$ = 1.53

"Eco" Rom Installed
900/400 with -171mV & 50% PL

Hashrate: 2,025 H/s
Power: 885 W at the wall.

Analysis: Each card is drawing 142 W from the wall and producing 337.5 H/s. The system is drawing 33 W.

H/W = 2.38
H/$ = 1.24

Summary: The goal is to crank the wattage down to 100 W at the PSU resulting in ~110 W at the wall. To accomplish this I need to shave another 30 W per card, which appears doable. The sticker is that I would like to keep it at or above 1,800 H/s in pursuit of a H/W ratio of 3. If anyone has a Fury rom they wouldn't mind sharing I would be greatly appreciative. Likewise, I am willing to share what I've been working on (more work to come).

What is the maximum that you can undervolt with stock clocks 1050/500? It's interesting to know the difference in consumption not only between stock and underclock + undervolt, but specially between stock undervolt and underclock + undervolt.

Also I have been having some problems when undervolting with msi afterburner. Cards crash with BSOD if I undervolt them cold. If I undervolt them when they are already hot, they tolerate it. Did anything of this happen to you as well?