Jump to content

Adaptive mode

DotoreN
 Share
Posted

I am currently using 1.3volts for my i7 4790k as overclock on manual mode. People mention that adaptive mode is not recommended for stresstesting as it can cause so called voltage spikes that hurt the CPU. 

So I have 2 questions, can these voltage spikes also happen during gaming in adaptive mode? And if I want to change from manual to adaptive, what voltage do I need in this case? How is that calculated.

Link to comment
Share on other sites
Link to post
Share on other sites
Posted
8 minutes ago, DotoreN said:

People mention that adaptive mode is not recommended for stresstesting as it can cause so called voltage spikes that hurt the CPU. 

that's wrong, the change in power consumption is what causes voltage spikes. Changing voltage constantly doesnt affect voltage spikes nearly as much as that.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

Link to comment
Share on other sites
Link to post
Share on other sites
Posted
  • Author
23 hours ago, Jurrunio said:

that's wrong, the change in power consumption is what causes voltage spikes. Changing voltage constantly doesnt affect voltage spikes nearly as much as that.

Can these spikes happen during gaming aswell on adaptive?

 

Also if electricity bill isn't a problem. is a manual constant 1.3volts (haswell) bad for the CPU (as in potential degrade faster) compared to adaptive where it goes lower in idle?

 

Not sure wether adaptive or manual is the mode I want to set it at.

Link to comment
Share on other sites
Link to post
Share on other sites
Posted

I prefer adaptive voltage for my systems so that they aren't running full bore 24/7 for no reason. Scaling technology is pretty good these days so outside of maximum extreme OC scenarios I would always go for adaptive voltage for longevity, lower power use, less waste heat, etc. 

 

For reference, i was able to get benchmarks stable on a 7960x at 5.2ghz on water with adaptive voltage. Very cold ambient, but still :)

HEDT: i9 10980XE @ 4.9 gHz, 64GB @ 3600mHz CL14 G.Skill Trident-Z DDR4, 2x Nvidia Titan RTX NVLink SLI, Corsair AX1600i, Samsung 960 Pro 2TB OS/apps, Samsung 850 EVO 4TB media, LG 38GL950G-B monitor, Drop CTRL keyboard, Decus Respec mouse

Laptop: Razer Blade Pro 2019 9750H model, 32GB @ 3200mHz CL18 G.Skill Ripjaws DDR4, 2x Samsung 960 Pro 1TB RAID0, repasted with Thermal Grizzly Kryonaut
Gaming Rig: i9 9900ks @ 5.2ghz, 32GB @ 4000mHz CL17 G.Skill Trident-Z DDR4, EVGA RTX 2080 Ti Kingpin, Corsair HX1200, Samsung 970 EVO Plus 2TB, Asus PG348Q monitor, Corsair K70 LUX RGB keyboard, Corsair Ironclaw mouse
HTPC: i7 7700 (delidded + LM), 16GB @ 2666mHz CL15 Corsair Vengeance LPX DDR4, MSI Geforce GTX 1070 Gaming X, Corsair SFX 600, Samsung 850 Pro 512gb, Samsung Q55R TV, Filco Majestouch Convertible 2 TKL keyboard, Logitech G403 wireless mouse

Link to comment
Share on other sites
Link to post
Share on other sites
Posted
2 hours ago, DotoreN said:

Can these spikes happen during gaming aswell on adaptive?

 

Also if electricity bill isn't a problem. is a manual constant 1.3volts (haswell) bad for the CPU (as in potential degrade faster) compared to adaptive where it goes lower in idle?

 

Not sure wether adaptive or manual is the mode I want to set it at.

yes they still happen. Removing voltage spikes completely requires predicting the future accurately and consistently which we cannot do atm.

 

No, manual is no worse than adaptive

 

Use adaptive for vcore to reduce power draw at low loads.

 

Voltage spike isn't much of a problem on Haswell and other architectures with integrated voltage regulator. By putting the voltage regulator inside the CPU, it can react to voltage spikes much faster by changing duty cycles of the high side fet earlier (shorter distance for sensing signals to move around). If you're really concerned you can increase the FIVR switching frequency, but note that this comes at the cost of efficiency and heat output.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

Link to comment
Share on other sites
Link to post
Share on other sites
Posted

The main reason for using fixed over adaptive was to combat the increase in voltage (not a spike) with AVX instructions.

 

If using core C-State C6 the core voltage is gated off and during C1-C6 the core clock is stopped (halted).

AWOL

Link to comment
Share on other sites
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing CPUs, Motherboards, and Memory

×