• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

gtx 1660 super mini undervolt WIP

  • Thread starter Deleted member 182555
  • Start date
D

Deleted member 182555

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

Attachments

  • 1660-undervolt-wip_edit.zip
    6.1 MB · Views: 90
Joined
Feb 24, 2023
Messages
2,299 (4.97/day)
Location
Russian Wild West
System Name DLSS / YOLO-PC
Processor i5-12400F / 10600KF
Motherboard Gigabyte B760M DS3H / Z490 Vision D
Cooling Laminar RM1 / Gammaxx 400
Memory 32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s) RX 6700 XT / RX 480 8 GB
Storage A couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s) Compit HA2704 / Viewsonic VX3276-MHD-2
Case Matrexx 55 / Junkyard special
Audio Device(s) Want loud, use headphones. Want quiet, use satellites.
Power Supply Thermaltake 1000 W / FSP Epsilon 700 W / Corsair CX650M [backup]
Mouse Don't disturb, cheese eating in progress...
Keyboard Makes some noise. Probably onto something.
VR HMD I live in real reality and don't need a virtual one.
Software Windows 10 and 11
I achieved something similar with my old 1070 four years ago. ~110 W (of 150) at 99% of stock performance.
 
Joined
Feb 24, 2023
Messages
2,299 (4.97/day)
Location
Russian Wild West
System Name DLSS / YOLO-PC
Processor i5-12400F / 10600KF
Motherboard Gigabyte B760M DS3H / Z490 Vision D
Cooling Laminar RM1 / Gammaxx 400
Memory 32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s) RX 6700 XT / RX 480 8 GB
Storage A couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s) Compit HA2704 / Viewsonic VX3276-MHD-2
Case Matrexx 55 / Junkyard special
Audio Device(s) Want loud, use headphones. Want quiet, use satellites.
Power Supply Thermaltake 1000 W / FSP Epsilon 700 W / Corsair CX650M [backup]
Mouse Don't disturb, cheese eating in progress...
Keyboard Makes some noise. Probably onto something.
VR HMD I live in real reality and don't need a virtual one.
Software Windows 10 and 11
D

Deleted member 182555

Guest
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? :D
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...
 
Joined
Feb 24, 2023
Messages
2,299 (4.97/day)
Location
Russian Wild West
System Name DLSS / YOLO-PC
Processor i5-12400F / 10600KF
Motherboard Gigabyte B760M DS3H / Z490 Vision D
Cooling Laminar RM1 / Gammaxx 400
Memory 32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s) RX 6700 XT / RX 480 8 GB
Storage A couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s) Compit HA2704 / Viewsonic VX3276-MHD-2
Case Matrexx 55 / Junkyard special
Audio Device(s) Want loud, use headphones. Want quiet, use satellites.
Power Supply Thermaltake 1000 W / FSP Epsilon 700 W / Corsair CX650M [backup]
Mouse Don't disturb, cheese eating in progress...
Keyboard Makes some noise. Probably onto something.
VR HMD I live in real reality and don't need a virtual one.
Software Windows 10 and 11
D

Deleted member 182555

Guest
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!!!

curve.jpg


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
    timespy.jpg
    502.4 KB · Views: 45
Last edited by a moderator:
D

Deleted member 182555

Guest
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
    3DMarkTimeSpy_2023_12_05_11_44_42_754.jpg
    1 MB · Views: 28
  • pass.jpg
    pass.jpg
    495.5 KB · Views: 30
D

Deleted member 182555

Guest
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

1702938900340.png


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.


1702943543596.png
 
Last edited by a moderator:
Top