gtx 1660 super mini undervolt WIP (2024)

D

Deleted member 182555

Guest
  • Nov 11, 2023
  • #1

max voltage limit 0.9v
tdp limit 90w from 125w
same performances?

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  • 1660-undervolt-wip_edit.zip

    6.1 MB · Views: 135

Beginner Macro Device

gtx 1660 super mini undervolt WIP (2)
Joined
Feb 24, 2023
Messages
2,905(4.74/day)
Location
Russian Wild West

System Specs

System NameDLSS / YOLO-PC
Processori5-12400F / 10600KF
MotherboardGigabyte B760M DS3H / Z490 Vision D
CoolingLaminar RM1 / Gammaxx 400
Memory32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s)RX 6700 XT / R9 380 2 GB
StorageA couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s)Compit HA2704 / MSi G2712
CaseMatrexx 55 / Junkyard special
Audio Device(s)Want loud, use headphones. Want quiet, use satellites.
Power SupplyThermaltake 1000 W / Corsair CX650M / DQ550ST [backup]
MouseDon't disturb, cheese eating in progress...
KeyboardMakes some noise. Probably onto something.
VR HMDI live in real reality and don't need a virtual one.
SoftwareWindows 10 and 11
  • Nov 11, 2023
  • #2

I achieved something similar with my old 1070 four years ago. ~110 W (of 150) at 99% of stock performance.

D

Deleted member 182555

Guest
  • Nov 11, 2023
  • #3

Beginner Micro Device said:

one second I'm uploading video...

Beginner Micro Device said:

I achieved something similar with my old 1070 four years ago. ~110 W (of 150) at 99% of stock performance.

In your opinion, how much can we go further down without compromising performance? what voltage?

Beginner Macro Device

gtx 1660 super mini undervolt WIP (4)
Joined
Feb 24, 2023
Messages
2,905(4.74/day)
Location
Russian Wild West

System Specs

System NameDLSS / YOLO-PC
Processori5-12400F / 10600KF
MotherboardGigabyte B760M DS3H / Z490 Vision D
CoolingLaminar RM1 / Gammaxx 400
Memory32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s)RX 6700 XT / R9 380 2 GB
StorageA couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s)Compit HA2704 / MSi G2712
CaseMatrexx 55 / Junkyard special
Audio Device(s)Want loud, use headphones. Want quiet, use satellites.
Power SupplyThermaltake 1000 W / Corsair CX650M / DQ550ST [backup]
MouseDon't disturb, cheese eating in progress...
KeyboardMakes some noise. Probably onto something.
VR HMDI live in real reality and don't need a virtual one.
SoftwareWindows 10 and 11
  • Nov 11, 2023
  • #4

Don Zauser said:

what voltage?

I think anything lower than 870 mV will be unstable at stock clocks. Still, silicon lottery to consider.

D

Deleted member 182555

Guest
  • Nov 11, 2023
  • #5

Beginner Micro Device said:

I think anything lower than 870 mV will be unstable at stock clocks. Still, silicon lottery to consider.

how many watts do you want to read? gtx 1660 super mini undervolt WIP (5)
by cheating on power sensor I can get the numbers you want but it would be a fake.
however I still have to test if 0.875v is stable on timespy stress test...

Beginner Macro Device

gtx 1660 super mini undervolt WIP (7)
Joined
Feb 24, 2023
Messages
2,905(4.74/day)
Location
Russian Wild West

System Specs

System NameDLSS / YOLO-PC
Processori5-12400F / 10600KF
MotherboardGigabyte B760M DS3H / Z490 Vision D
CoolingLaminar RM1 / Gammaxx 400
Memory32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s)RX 6700 XT / R9 380 2 GB
StorageA couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s)Compit HA2704 / MSi G2712
CaseMatrexx 55 / Junkyard special
Audio Device(s)Want loud, use headphones. Want quiet, use satellites.
Power SupplyThermaltake 1000 W / Corsair CX650M / DQ550ST [backup]
MouseDon't disturb, cheese eating in progress...
KeyboardMakes some noise. Probably onto something.
VR HMDI live in real reality and don't need a virtual one.
SoftwareWindows 10 and 11
  • Nov 11, 2023
  • #6

Don Zauser said:

how many watts do you want to read?

1969: people are reading books.
2023: people are reading power.

D

Deleted member 182555

Guest
  • Nov 11, 2023
  • #7

stable but is limited by 90w, voltage varies between 0.8-0.82v, I can still improve, I have margin...

S.N.N.

the Wall!!!

gtx 1660 super mini undervolt WIP (8)

it's not much... about 200 pts of timespy less without touching vram. it takes about 95w for a draw with a little more voltage. assuming that watts shown are real and I have my doubts.

I noticed that during timespy stress test, probably due to increase in temps of VRMs, around 3-4W of efficiency was lost.

Attachments

  • timespy.jpg

    502.4 KB · Views: 54

Last edited by a moderator:

D

Deleted member 182555

Guest
  • Dec 5, 2023
  • #8

I tried replacing thermal paste on 1660S and the situation improved by 1-2°.
now it passes the stresstest with stock bios, before it failed with 80-81°.
I also tried the carbon thermal pad which gives -1° more than paste but I have now removed it.
However, I believe the solution is permanent undervolt.

Attachments

  • 3DMarkTimeSpy_2023_12_05_11_44_42_754.jpg

    1 MB · Views: 38

  • pass.jpg

    495.5 KB · Views: 42

D

Deleted member 182555

Guest
  • Dec 18, 2023
  • #9

with 100w the performances are practically the same, but with 70° and without fan noise.
this 1660 super mini is not that great.
maybe it can be improved further, however in a long gaming session it should be even better, average clock +35mhz .

from the third lap efficiency begins to degrade

gtx 1660 super mini undervolt WIP (12)

stabilized with some small adjustments... 1935mhz 0.825v and it never goes down, effective speed is 1950->1927mhz, temps +1°. next step 1995 but I don't think it will be possible without raising voltage.

gtx 1660 super mini undervolt WIP (13)

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gtx 1660 super mini undervolt WIP (2024)

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