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GTX 1080 Ti underclock vs stock vs overclock. Efficiency vs plug and play vs brute force.

Joined
Sep 9, 2013
Messages
515 (0.23/day)
Processor delidded i9-9900K (P0) @ 5.0Ghz + NB @ 4.7Ghz ~1.22V (VR VOUT) 0.976V IO and SA + Koolance CPU-380i
Motherboard Asrock Z370 Taichi P4.00
Cooling HWlabs Nemesis GTS 360 and GTX 240 / 3x Gentle Typhoon AP-15 1850 RPM / 3x EK Vardar / SC600 pump
Memory 2x8GB 2133Mhz OEM SK Hynix RAM (dual ranks AFR) @ 3500Mhz 16-18-18-36-360-2T 1.408V with 60mm fan
Video Card(s) EVGA GTX 1080 Ti FTW3 + universal waterblock underclock @ 1721Mhz 0.8V 12488 mem(140W during gaming)
Storage Transcend PCIE 220S 1TB , Seagate Barracuda 4TB
Display(s) Dell S2716DG A08 2560 x 1440 144Hz (fixed deep sleep , fixed coronas , fixed color banding)
Case NZXT H440 White modded front and top panel for better airflow.
Power Supply Corsair HX 750W 80+ Silver
Software Windows 10 Enterprise 2016 LTSB (1607 inside)
Benchmark Scores 1838 FIDE rating (inactive since 2010). ~2150 Lichess.org blitz rating.
Test system

Underclock config = EVGA GTX 1080 Ti FTW3 @ 1721 core 0.8V / 12474 mem , Underclock core but overclock VRAM.
Why OC VRAM ? To gain more performance at almost no additional power. Intend to show fully optimized config for performance per watt.
FE config = EVGA GTX 1080 Ti FTW3 @ 1835 core / 11000 mem , This is median value for most FE aka reference clock.
AIB config = EVGA GTX 1080 Ti FTW3 @ 1976 core / 11000 mem , This is stock clock for EVGA FTW3 (intend to show performance of typical non reference cards).
Overclock config = EVGA GTX 1080 Ti FTW3 @ 2126 core / 12474 mem , overclock both core and VRAM.

i7-8700K @ 5Ghz core and 4.8Ghz uncore
ASRock Z370 Taichi P4.00 2x8GB
DDR4-3500 16-18-18-36-2T (dual ranks double side Hynix AFR)
Corsair HX 750W
NZXT H440 White
Custom Water Cooling
Windows 10 64 bit 1607
Nvidia 430.64
Record by ShadowPlay

Side by side comparison.


Summary charts.

125397


125398


125399


125400


125401


125402


125403


125404


As you can see the underclock config work really well. Almost matching FE in every games at around 150W only.
 
Last edited:
Joined
Sep 22, 2012
Messages
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Location
Belgrade, Serbia
System Name Intel® X99 Wellsburg
Processor Intel® Core™ i7-5820K - 4.5GHz
Motherboard ASUS Rampage V E10 (1801)
Cooling EK RGB Monoblock + EK XRES D5 Revo Glass PWM
Memory CMD16GX4M4A2666C15
Video Card(s) ASUS GTX1080Ti Poseidon
Storage Samsung 970 EVO PLUS 1TB /850 EVO 1TB / WD Black 2TB
Display(s) Samsung P2450H
Case Lian Li PC-O11 WXC
Audio Device(s) CREATIVE Sound Blaster ZxR
Power Supply EVGA 1200 P2 Platinum
Mouse Logitech G900 / SS QCK
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Software Windows 10 Pro x64
No doubt GTX1080Ti is great GPU for us who stay behind and can't afford to follow insane prices of NVIDIA.
Without mine GTX1080Ti I would very hard resist to switch to AMD Radeon VII or Navy depend of price/performance.
I don't want to pay RTX2070 same as I payed full GK110 faster then Titan Black because NVIDIA expect that.
A lot of people who used on premium cards didn't had other choice than to look for RTX2070, of maybe cheapest version of RTX2080 to pay more then any card before.
I will not downclock mine, but I will not OC as well.
I didn't even change on OC mode, It's set to default Gaming Mode.
 
Joined
Sep 9, 2013
Messages
515 (0.23/day)
Processor delidded i9-9900K (P0) @ 5.0Ghz + NB @ 4.7Ghz ~1.22V (VR VOUT) 0.976V IO and SA + Koolance CPU-380i
Motherboard Asrock Z370 Taichi P4.00
Cooling HWlabs Nemesis GTS 360 and GTX 240 / 3x Gentle Typhoon AP-15 1850 RPM / 3x EK Vardar / SC600 pump
Memory 2x8GB 2133Mhz OEM SK Hynix RAM (dual ranks AFR) @ 3500Mhz 16-18-18-36-360-2T 1.408V with 60mm fan
Video Card(s) EVGA GTX 1080 Ti FTW3 + universal waterblock underclock @ 1721Mhz 0.8V 12488 mem(140W during gaming)
Storage Transcend PCIE 220S 1TB , Seagate Barracuda 4TB
Display(s) Dell S2716DG A08 2560 x 1440 144Hz (fixed deep sleep , fixed coronas , fixed color banding)
Case NZXT H440 White modded front and top panel for better airflow.
Power Supply Corsair HX 750W 80+ Silver
Software Windows 10 Enterprise 2016 LTSB (1607 inside)
Benchmark Scores 1838 FIDE rating (inactive since 2010). ~2150 Lichess.org blitz rating.
Someone ask me how to undervolt. Very easy...

 
Joined
Feb 1, 2013
Messages
462 (0.19/day)
System Name Gentoo64 /w Cold Coffee
Processor 9900K 5GHz 1.224v
Motherboard EVGA Z370 Micro
Cooling Custom 480mm H2O, Raystorm Pro, Nemesis GTX, EK-XRES
Memory 2x8GB Trident Z 4000-16-1T 1.425v
Video Card(s) MSI Seahawk EK X 1080Ti 2100.5/12600
Storage Samsung 970 EVO 500GB
Display(s) XB271HU 165Hz
Case FT03-T
Audio Device(s) SBz
Power Supply SS-850KM3
Mouse G502
Keyboard G710+
Software Gentoo 64-bit, Windows 7 64-bit
Benchmark Scores http://www.userbenchmark.com/UserRun/7242501
Is there a frames per watt plot? That would be persuasive.
 
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