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Author Topic: Anyone tried undervolting?  (Read 16051 times)
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CoenP
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« on: April 28, 2015, 11:58:19 pm »

Hi,

My mobo allows for lowering the voltage of the CPU, memory and Chipset. I usually leave the setting at auto where I presume it will follow the selected clock/multiplier rates (lower rates: lower voltage).

Now I do not really understand what is going on here. There is the power state control, the Operating system (XT Tweaks?) and BIOS all playing a role.

In a moment of Zen I set all to the lowest voltage setting where the PC allows for a boot while maintaining the clocks/multiplier settings. This is not without a reason, but not for this thread.

Good or not the voltage lowering did offer a very noticeable increase in clarity.
Also, as expected power consumption dropped quite a bit.

I just wondered:
is it allowed?
Do others have found a similar effect? 
Do I fix the voltage by selecting the BIOS setting and is the affect due to less supply variations?

thanks,

regards, Coen
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Settings: Qn: , SFS: , timeres: XT tweaks: , buf: 4096, driver: 8 ms,

Audio PC (jan 19): XXHE PC v1 with RAMdisk w.o. videocard and 1 of 2 cpu fans + BRIX/USB3 storage musicserver. ETN to Fibre converters (linear supplies), 500m SFP modules & 5m OM4 cable. Power cable PE not connected, together with nos1 and poweramp in separate "audio" powerstrip.

Clarixa set + Intona (or Lush 1m), Phasure NOS1a-75B G3 USB (buf 16 ms)-> Blaxius ->SE EL95 (0,8W triode) + cheap link to Abaqus 300W plateamps> Bastanis cable-> Bastanis Sagarmatha Duo ("DIY").

[other sources: TD124/3009SII-i/Grace F9/lounge LCR phono; Rega Planet 1997 vintage]
PeterSt
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« Reply #1 on: May 01, 2015, 08:37:53 am »

Hi Coen,

Quote
Do I fix the voltage by selecting the BIOS setting and is the affect due to less supply variations?

Fix ? What do you mean by that ? And the whole sentence /question to me looks like "instead of a screw driver ?". Not clear (to me) what you're asking !

Quote
is the affect due to less supply variations?

How do you see this happening in the first place - "less variations" ?

Peter
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For the Stealth III LPS PC :
W10-14393.0 - July 17, 2021 (2.11)
XXHighEnd Mach III Stealth LPS PC -> Xeon Scalable 14/28 core with Hyperthreading On (set to 14/28 cores in BIOS and set to 10/20 cores via Boot Menu) @~660MHz, 48GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/0/*1*/ Q1Factor = *4* / Dev.Buffer = 4096 / ClockRes = *10ms* / Memory = Straight Contiguous / Include Garbage Collect / SFS = *10.13*  (max 10.13) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / OSD Off (!) / Running Time Off / Minimize OS / XTweaks : Balanced Load = *62* / Nervous Rate = *1* / Cool when Idle = n.a / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / Custom Filtering *Low* (16x) / Always Clear Proxy before Playback = On -> USB3 from MoBo -> Lush^3
A: W-Y-R-G, B: *W-G* USB 1m00 -> Phisolator 24/768 Phasure NOS1a/G3 75B (BNC Out) async USB DAC, Driver v1.0.4b (16ms) -> B'ASS Current Amplifier -> Blaxius*^2.5* A:B-G, B:B-G Interlink -> Orelo MKII Active Open Baffle Horn Speakers. ET^2 Ethernet from Mach III to Music Server PC (RDC Control).
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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CoenP
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« Reply #2 on: June 24, 2015, 11:14:14 pm »

A lttle late reply but relevant for those why might be tempted to try.

Simply put I was trying to use the bios settings to lower and fix the voltages on the Mobo components (cpu, memory, chipset). This resulted in a lower average power consumption and a change in sound.

Now the only consistent result I got was a computer that hangs on one of the future (windows 7) boots or freezes during normal operation. Resetting the voltage to auto fixes the boot/freeze problem. Not a very unnerving problem but this also makes it an unworkable tweak.

I'm not diving into it any further.

cheers, Coen
Logged

Settings: Qn: , SFS: , timeres: XT tweaks: , buf: 4096, driver: 8 ms,

Audio PC (jan 19): XXHE PC v1 with RAMdisk w.o. videocard and 1 of 2 cpu fans + BRIX/USB3 storage musicserver. ETN to Fibre converters (linear supplies), 500m SFP modules & 5m OM4 cable. Power cable PE not connected, together with nos1 and poweramp in separate "audio" powerstrip.

Clarixa set + Intona (or Lush 1m), Phasure NOS1a-75B G3 USB (buf 16 ms)-> Blaxius ->SE EL95 (0,8W triode) + cheap link to Abaqus 300W plateamps> Bastanis cable-> Bastanis Sagarmatha Duo ("DIY").

[other sources: TD124/3009SII-i/Grace F9/lounge LCR phono; Rega Planet 1997 vintage]
juanpmar
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« Reply #3 on: June 24, 2015, 11:59:36 pm »

Thanks Coen, thats a similar situation than the one Alain said happens with his mb which is similar to mine. So trying to lower the CPU frequency by means of undervoltage, in this case, could make the computer hangs. Or is there any other method to lower the CPU frequency other than undervolting?

Regards,
Juan
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Audio Pc: Processor i7 970: 3200MHz (reduced to 1668MHz), 6+6 cores/ RAM Corsair DDR3, 24Gb, 1333MHz/ Mb Asus X58 Sabertooth/ OS and XXHE in Peter's RAM-Disk / The CPU fan is the only one in the Audio Pc: NF-S12A (600rpm/6.7db)/ No graphic card/ Power supply: Seasonic SS-400FL2, fanless.

Configuration and Updates in HOW I'VE BUILT MY NEW PC...http://www.phasure.com/index.php?topic=1673.0. This post is very old but maybe someone still find it useful

XXHighEnd: 2.11a. Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN/ KS:Phasure NOS1 Out 4.0/ #4 Engine/ Adaptive Mode/ Q1=10, Q3,4,5=1, xQ1=15/ Dev.Buffer: 4096/ ClockRes: 15ms/ Straight Contiguous/ SFS: 0.69 (max 0,69)/ Not Invert/ Phase Alignment Off/ Allow format change/ Decode HDCD/ Playerprio: Low/ ThreadPrio: Real Time/ Scheme: Core 3-5/ UnAttended/ Not Switch during Playback Off/ Playback Drive none/ UnAttended/ Include Garbage Collect/ Copy to XX Drive by standard/ Always clear Proxy before Playback/ Stop Desktop Services/ Stop Remaining Services/ Stop All Services: Off/ Keep LAN Services: On - Persist: Off/ Use Remote Desktop/ Minimize OS/ XTweaks : Balanced Load 35/ Nervous Rate 10/ Cool when Idle -/ Provide Stable Power 0/ Utilize Cores always 1/ Time Performance Index: Optimal / Time Stability: Stable / Arc Prediction/ Number of cores in use: 12 (máx. 6-12)

Music Server PC (W10) totally silent with OS (W10) in SSD and music inside in SSDs - RDC > Ethernet Gigabyte cable 3m > Audio Pc > 1m USB Lush cable directly from the USB3.0 in the motherboard > PHASURE NOS1a-75B-G3 (Driver v1.0.4) 16ms > Blaxius BNC interconnects > Genelec 1037B 3-Way Active speakers with BNC inputs
phantomax
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« Reply #4 on: June 25, 2015, 09:06:04 am »

Hello Juan,

I use program a called GetSFB to reduce the front size bus. This, together with the change in the multiplier due to the XXHE tweaks allow me to go down in frequency to some extent where the PC hangs. The problem is that I need to do it after every reboot and moreover you need to identify your chipset to get it working.

Regards,

Maxi
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Audio PC -> AsRock Z79 intel i-3 4170  @~800MHz, 16GB, Windows 10 64 bit build 14393.0 from RAM, DIY Linear Power Supply. music on LAN /
Engine#4 Special Mode/Q1/-/3/4/5=*30*/-/*1*/*1*/*1*/ Q1Factor = *5* / Dev.Buffer = 1024 /ClockRes = *15ms* /Memory = Straight Contiguous / Include Garbage Collect /
SFS = *0,69*  (max 0,69 / Phase Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 1-3 / Not Switch Processors during Playback = Off/ Playback
Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / *OSD Off* / Running Time Off / Minimize OS / XTweaks : Balanced Load = 35 / Nervous Rate = 10 / Cool when Idle = n.a / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Not the best / Time Stability = not stable / *Custom Filtering low for 176400* / Always Clear Proxy before Playbck = On -> Modified Audiotrak Prodigy HD2 internal soundcard with analog tube buffer (Broskie cathode follower) -> Passive biamplification: Canary Audio CA-301 MkII for highs- mids and Counterpoint SA-100 for lows -> Audiovector M-3 Super / modified Musical Fidelity X-3 (6h6p tubes) -> Grado 1000 headphones.
phantomax
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« Reply #5 on: June 25, 2015, 10:14:05 am »

Just a rectification: The name of the software is Setfsb. fool

And also I have to clarify that after a little research the software seems to be a bit outdated (my PC is too) and, furthermore, not all chipsets are represented.

Regards

Maxi
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Audio PC -> AsRock Z79 intel i-3 4170  @~800MHz, 16GB, Windows 10 64 bit build 14393.0 from RAM, DIY Linear Power Supply. music on LAN /
Engine#4 Special Mode/Q1/-/3/4/5=*30*/-/*1*/*1*/*1*/ Q1Factor = *5* / Dev.Buffer = 1024 /ClockRes = *15ms* /Memory = Straight Contiguous / Include Garbage Collect /
SFS = *0,69*  (max 0,69 / Phase Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 1-3 / Not Switch Processors during Playback = Off/ Playback
Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / *OSD Off* / Running Time Off / Minimize OS / XTweaks : Balanced Load = 35 / Nervous Rate = 10 / Cool when Idle = n.a / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Not the best / Time Stability = not stable / *Custom Filtering low for 176400* / Always Clear Proxy before Playbck = On -> Modified Audiotrak Prodigy HD2 internal soundcard with analog tube buffer (Broskie cathode follower) -> Passive biamplification: Canary Audio CA-301 MkII for highs- mids and Counterpoint SA-100 for lows -> Audiovector M-3 Super / modified Musical Fidelity X-3 (6h6p tubes) -> Grado 1000 headphones.
juanpmar
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« Reply #6 on: June 25, 2015, 10:15:44 am »

Thanks Maxi, I'll take a look at what you say in a few days because now I'm trying to solve a problem with one of the speakers and I have all my system "patas arriba" *

Regards,
Juan

*upside down
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Audio Pc: Processor i7 970: 3200MHz (reduced to 1668MHz), 6+6 cores/ RAM Corsair DDR3, 24Gb, 1333MHz/ Mb Asus X58 Sabertooth/ OS and XXHE in Peter's RAM-Disk / The CPU fan is the only one in the Audio Pc: NF-S12A (600rpm/6.7db)/ No graphic card/ Power supply: Seasonic SS-400FL2, fanless.

Configuration and Updates in HOW I'VE BUILT MY NEW PC...http://www.phasure.com/index.php?topic=1673.0. This post is very old but maybe someone still find it useful

XXHighEnd: 2.11a. Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN/ KS:Phasure NOS1 Out 4.0/ #4 Engine/ Adaptive Mode/ Q1=10, Q3,4,5=1, xQ1=15/ Dev.Buffer: 4096/ ClockRes: 15ms/ Straight Contiguous/ SFS: 0.69 (max 0,69)/ Not Invert/ Phase Alignment Off/ Allow format change/ Decode HDCD/ Playerprio: Low/ ThreadPrio: Real Time/ Scheme: Core 3-5/ UnAttended/ Not Switch during Playback Off/ Playback Drive none/ UnAttended/ Include Garbage Collect/ Copy to XX Drive by standard/ Always clear Proxy before Playback/ Stop Desktop Services/ Stop Remaining Services/ Stop All Services: Off/ Keep LAN Services: On - Persist: Off/ Use Remote Desktop/ Minimize OS/ XTweaks : Balanced Load 35/ Nervous Rate 10/ Cool when Idle -/ Provide Stable Power 0/ Utilize Cores always 1/ Time Performance Index: Optimal / Time Stability: Stable / Arc Prediction/ Number of cores in use: 12 (máx. 6-12)

Music Server PC (W10) totally silent with OS (W10) in SSD and music inside in SSDs - RDC > Ethernet Gigabyte cable 3m > Audio Pc > 1m USB Lush cable directly from the USB3.0 in the motherboard > PHASURE NOS1a-75B-G3 (Driver v1.0.4) 16ms > Blaxius BNC interconnects > Genelec 1037B 3-Way Active speakers with BNC inputs
phantomax
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« Reply #7 on: June 25, 2015, 10:21:05 am »

I have all my system "patas arriba" *
*upside down

¡Dios mío!*  swoon I hope it's nothing serious

*OMG

Maxi
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Audio PC -> AsRock Z79 intel i-3 4170  @~800MHz, 16GB, Windows 10 64 bit build 14393.0 from RAM, DIY Linear Power Supply. music on LAN /
Engine#4 Special Mode/Q1/-/3/4/5=*30*/-/*1*/*1*/*1*/ Q1Factor = *5* / Dev.Buffer = 1024 /ClockRes = *15ms* /Memory = Straight Contiguous / Include Garbage Collect /
SFS = *0,69*  (max 0,69 / Phase Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 1-3 / Not Switch Processors during Playback = Off/ Playback
Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / Stop Desktop, Remaining, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / *OSD Off* / Running Time Off / Minimize OS / XTweaks : Balanced Load = 35 / Nervous Rate = 10 / Cool when Idle = n.a / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Not the best / Time Stability = not stable / *Custom Filtering low for 176400* / Always Clear Proxy before Playbck = On -> Modified Audiotrak Prodigy HD2 internal soundcard with analog tube buffer (Broskie cathode follower) -> Passive biamplification: Canary Audio CA-301 MkII for highs- mids and Counterpoint SA-100 for lows -> Audiovector M-3 Super / modified Musical Fidelity X-3 (6h6p tubes) -> Grado 1000 headphones.
juanpmar
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« Reply #8 on: June 25, 2015, 10:36:42 am »

 I hope to get it sounds good ! asp 

Saludos, 
Juan
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Audio Pc: Processor i7 970: 3200MHz (reduced to 1668MHz), 6+6 cores/ RAM Corsair DDR3, 24Gb, 1333MHz/ Mb Asus X58 Sabertooth/ OS and XXHE in Peter's RAM-Disk / The CPU fan is the only one in the Audio Pc: NF-S12A (600rpm/6.7db)/ No graphic card/ Power supply: Seasonic SS-400FL2, fanless.

Configuration and Updates in HOW I'VE BUILT MY NEW PC...http://www.phasure.com/index.php?topic=1673.0. This post is very old but maybe someone still find it useful

XXHighEnd: 2.11a. Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN/ KS:Phasure NOS1 Out 4.0/ #4 Engine/ Adaptive Mode/ Q1=10, Q3,4,5=1, xQ1=15/ Dev.Buffer: 4096/ ClockRes: 15ms/ Straight Contiguous/ SFS: 0.69 (max 0,69)/ Not Invert/ Phase Alignment Off/ Allow format change/ Decode HDCD/ Playerprio: Low/ ThreadPrio: Real Time/ Scheme: Core 3-5/ UnAttended/ Not Switch during Playback Off/ Playback Drive none/ UnAttended/ Include Garbage Collect/ Copy to XX Drive by standard/ Always clear Proxy before Playback/ Stop Desktop Services/ Stop Remaining Services/ Stop All Services: Off/ Keep LAN Services: On - Persist: Off/ Use Remote Desktop/ Minimize OS/ XTweaks : Balanced Load 35/ Nervous Rate 10/ Cool when Idle -/ Provide Stable Power 0/ Utilize Cores always 1/ Time Performance Index: Optimal / Time Stability: Stable / Arc Prediction/ Number of cores in use: 12 (máx. 6-12)

Music Server PC (W10) totally silent with OS (W10) in SSD and music inside in SSDs - RDC > Ethernet Gigabyte cable 3m > Audio Pc > 1m USB Lush cable directly from the USB3.0 in the motherboard > PHASURE NOS1a-75B-G3 (Driver v1.0.4) 16ms > Blaxius BNC interconnects > Genelec 1037B 3-Way Active speakers with BNC inputs
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« Reply #9 on: June 25, 2015, 12:26:39 pm »

Hi Coen,

I tried the same after your post but lowered the voltages step by step. It was counterproductive to lower the RAM voltage which leads very quick to instability. I found the same changes to SQ as you did and the system is stable.

Georg
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XXHE 2.10 - PC ASUS Sabertooth X99, passive Cooling / Seasonic P-400FL Platin / Core I7 6800K 6/12 cores scalable @1.2GHz, 16GB, Windows 10 Pro 64 bit build 14393.0, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 30/-/1/1/1/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 15ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.69  (max 0.69) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ 2GB RAMDisk (IMDisk) / UnAttended (Just Start) / Stop Desktop, WASAPI and W10 services / Use Remote Desktop / Keep LAN - Not Persist / WallPaper On / OSD Off / Running Time Off / Minimize OS / XTweaks : Balanced Load = 35 / Nervous Rate = 10 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / *Arc Prediction Filtering (16x)* / Always Clear Proxy before Playback = On
(Settings currently not stable)

USB3 from MoBo -> 2m Belkin -> Intona (Standard) with external power supply -> Clairixia cable
USB3 from MoBo -> 0,5m Belkin USB3 -> ALLDAQ ADQ-USB 3.0-ISO-PS with external power supply -> 2m Belkin USB2 cable

-> WaveIO to dddac1794 or to Soekris DAM1021
-> SMSL SU-8 ES9038
-> 2x Gainclone -> TQWT 9710M/01 + BMS 4524 Horn
-> 2x Quad 405 rebuild as mono amps with Dada Electronics boards -> Quad ESL63 Pro
-> 2x Anaview ALC0300-1300 -> Original Celestion SL6 in concrete housing
-> 2x Neumann KH-120
-> Funk MTX Monitor -> AKG K701
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