Solved Lag spikes after changing to new cooler.

February 10, 2013 at 10:44:00
Specs: Windows 7, AMD Phenom II X4 965 3.40 GHz / 8 GB.

I'm suffering from lag spikes after changing to new cooler.

Lags occur after I play for atleast 5 min (games which requires performance) with period of 5-10 secs lag and then go to smooth again every 1-3 min. Temperature is very rarely above 50 Celsius and never above 55 Celsius. When lag starts task manager shows that that game using CPU very chubby and then releases the pressure again.

I can't blame my graphic card (GeForce GTX 550 Ti) as it is up to date, bought a month ago from store.
My processor with motherboard were bought 4 month ago also from store.

First time I installed my CPU (AMD Phenom II X4 965 BE) I used AMD stock fan which was included in the package. Thermal Paste was already on cooler so I didn't have to worry about anything. Everything worked smoothly and without issues but sound from stock fan was drilling my ears so I just bought a new cooler (Zalman CNPS7X LED Cooling Fan/Heatsink (1 x 92 mm - 1950 rpm Long Life Bearing)). Cleaned my CPU from old thermal compound and added new from Zalman. Launched my PC to test it out and until I launched a game everything was just fine. First my thought was not to use included resistor which makes fan quieter but drops speed from 2000 RPM to 1500 RPM. No success, then I turned off one of my HDD (I have 500W PSU) also with no success. Then I bought a new thermal compound and applied it again with PEA method, no success, added a little bit more Thermal Compound so that it would spread all over CPU, also with no luck. And now I'm just sitting here without any more ideas what to do. I have not overclocked anything as I prefer stability rather than risk.


My Personal Computer specifications:
Power supply: Xilence XP500
Motherboard: AMD 760G/SB710 SAM3+ MATX/960GM-GS3 FX BULK ASROCK
CPU: AMD Phenom II X4 965 Black Edition
CPU Fan: Zalman CNPS7X LED Cooling Fan/Heatsink (1 x 92 mm - 1950 rpm Long Life Bearing)
GPU: Asus ENGTX550 Ti/DI/1GD5
RAM: DDR3 Crucial Ballistix 8GB (2x4GB) 1600MHz CL9 1.5V

Thanks in advance,
ZB.


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✔ Best Answer
February 10, 2013 at 13:51:20

When Cool & Quiet is enabled the CPU may throttle to a lower speed if there is no demand to run at full speed. This can cause the lags you describe.

The temperatures will not spike because the CPU voltage is decreased. That is how the CPU is throttled. This is done to conserve power and keep the fan from running fast, if at all.

This technology was designed for laptops where there is a finite amount of power available in the battery.

Disable Cool & Quiet to stop any throttling.



#1
February 10, 2013 at 10:51:20

Why did you feel the need to change the cooler in the first place?

What are you using to monitor the temps?

Is cool and quiet enabled in the BIOS?


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#2
February 10, 2013 at 10:57:42

Because of the high sound by stock cooler.

Core Temp version 1.0 RC4 - 64bit and AIDA64 (results were same)

Enabled. (Tried to disable it, but didn't worked out).


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#3
February 10, 2013 at 13:22:22

Does all your RAM still show in Windows? You may have disturbed it. Try re-seating it.

Also check the BIOS to verify the CPU and RAM speeds are as they should be.

edit

You should be able to change the Cool & Quiet setting. DId you use the pg up/dn keys?

Did you re-install Windows recently? ACPI should be enabled in the BIOS, if it isn't that may prevent changing Cool & Quiet. However, I think that setting must be selected BEFORE installing Windows. Changing it may cause Windows to fail to boot.


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Related Solutions

#4
February 10, 2013 at 13:34:23

RAMs are ok (I'm not a beginner with such stuff), they are all 8GB shown in Windows and in Core Temp. I didn't even touched them and when it lags occur, only cpu goes to max usage, rams are stable.

In BIOS rams are ok - 1600 without changes.
CPU is all set on Auto, so that even I can't change it's speed until I make it manual.

edit

Yes, I'm able to change Cool n Quiet settings. My Bios doesn't require to use page down/up it is just fine with arrows and enter.

Windows may be 2-3 month old, but I'm planning to re-install them tomorrow anyways. Windows doesn't fail to boot. ACPI I believe is enabled as I may change many things including Over Clocking, power management (or something similar, can't really remember)...


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#5
February 10, 2013 at 13:51:20
✔ Best Answer

When Cool & Quiet is enabled the CPU may throttle to a lower speed if there is no demand to run at full speed. This can cause the lags you describe.

The temperatures will not spike because the CPU voltage is decreased. That is how the CPU is throttled. This is done to conserve power and keep the fan from running fast, if at all.

This technology was designed for laptops where there is a finite amount of power available in the battery.

Disable Cool & Quiet to stop any throttling.


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#6
February 10, 2013 at 13:55:28

I mentioned in my second post that I tried disabling it and this didn't helped. I had this though too, but sadly...

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#7
February 10, 2013 at 16:28:36

Make sure that your 6pin PCIe connector is fully plugged in and was not knocked out or partially out.
Make sure that your CPU/heat sink fan is plugged into the CPU Fan spot and not system fan one.
Just for curiosity, list your power supply's amperage ratings on the 12Volt Rail(s) to be sure that will consistently support your GPU.

You have to be a little bit crazy to keep you from going insane.


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#8
February 10, 2013 at 21:48:25

Checked every pin and connection, everything was fine and in their place.

My PSU


edit after long ago

I believe I managed to find a solution for this problem. Will test for one day more to be sure and then I will post it. Anyways if you have any solution, please share it may come in handy for someone else or even me.


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#9
February 11, 2013 at 06:37:40

While the theory that the power supply was enough before so it should be enough still, makes sense, I see things in your power supply's specs that would make me not purchase it.
The wattage is inflated by pushing the 5Volt and 3.3Volt rails beyond anything a modern computer can use while still using two smaller 12Volt rails instead of one. It does not have Active PFC and it does not mention a PCIe 6pin connector. In order to power your 550Ti you must be using one of these connectors but without it, what adapter are you using? If you have a double Molex to PCIe 6pin adapter (acceptable practice) you MUST make sure that the two Molex connectors are on DIFFERENT wire runs from the power supply. If they are both connected to connectors on the same wire run, there are two problems:
1- The wire cannot carry enough amperage from the power supply to the adapter.
2- You are using only one of your 12Volt rails which may not be enough, by using two different runs, you should be tapping both 12Volt rails so your system is not starved for power while there is unused power waiting.

This is just a possibility that is more likely if you rearranged the connectors when you replaced the heat sink, but it should be looked at. A better arrangement would be to purchase a better power supply with a Single 12Volt rail, Active PFC, 80% or greater certified efficiency, a proper PCIe connector, and a brand name that is known for quality and has an extended warranty.

You have to be a little bit crazy to keep you from going insane.


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#10
February 11, 2013 at 08:34:09

I bought my PSU maybe in 2008 and my last Graphic Card didn't require 6pin connector, when I bought my new Graphic card there was included adapter to 6pin. I never had an issue with my PSU, even if PSU was a problem it would lag even before upgrading my CPU Cooler as I believe AMD Stock cooler would require much more power than my new Zalman because of RPM difference (only a guess).

And how I fixed my problem:

just updated my motherboard's BIOS to a recent version, now I have new option "Thermal Throttle" which was set on "auto" and Cool n Quiet "enabled", so I left them to default to see how new update will impact my computer. Finally this helped me out and there is no lag anymore although CPU temps now reach ~60 Celsius when playing a game.

Anyways if someone else will have similar issue, just use OtheHill #5 suggestion, update your BIOS to be sure you have all possible access and then disable those functions as Cool n Quiet or Thermal Throttle.


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