EXTREME Overclocking
Home | Reviews | EOC Forums | File Downloads | RealTime Pricing Engine | Free Magazines | Folding Stats Contact Us

Get More Out Of Your Volcano 7

Date Written: January 17, 2002
Written By: Jason Rabel
Company: Thermaltake

 

Get More Cooling For Free!:

The Thermaltake Volcano 7 heat sink has become very popular in the overclocking community by combining good cooling at a budget price. One of the nice features of the Volcano 7 is that it sports an 80mm fan that gives higher CFM without the noise traditionally associated with 60mm fans. However the Volcano 7 fan does not run at a fixed RPM like most traditional style fans. Instead the Volcano 7 fan RPM increases with the ambient temperature through the use of a temp probe mounted on the side of the fan housing. Here are the specs taken from the box on the fan's performance:

  • 2900RPM @ 25C (77F) / 46CFM

  • 5000RPM @ 35C (95F) / 53CFM

While I have always been happy with the performance of the Volcano 7, I noticed that it never reached the maximum RPM even when the CPU was under heavy use. The only way the fan will reach the higher speeds is if the ambient temperature around the probe increases, however most overclockers are big on case cooling so the ambient temp in the case never reaches high enough for the Volcano 7 to reach its peak performance. If you look at the picture below, you can see the green blob which is the temp probe that controls the fan.

So with that in mind, I thought to myself the probe needed to be somewhere that was warmer than the rest of the case to "fool" the fan into spinning faster. At first I was thinking of taping the probe near the voltage regulators since they get hot, or the back of my video card, however if you unscrew the fan you can see that the wires on the probe are not that long, and I didn't really want to fool with extending the wires to make it reach a heat source.

Sure enough as I was looking at the fan and the heat sink, the solution was right in front of me! The temp probe fits nicely right in the middle of the heat sink where the clip goes through! The temperature is definitely higher because the heat sink is absorbing all the heat from the CPU (as if that really needed to be said).

After booting the computer back up, it was very obvious that the fan was spinning at a higher RPM. So I decided to run some tests to see just how much faster it was spinning and how much more cooling I was getting.

 

Testing & Temperatures:

The test was conducted on an ABIT KT7A-RAID w/Athlon 1.4GHz @ 1.533GHz - 1.92v. The board was placed on an open workbench to keep the ambient temperature controlled and constant. Also, the fan speed was rounded to the nearest hundred RPM.

In the charts of the temperatures below, you may wonder what it means when it says "top" and "bottom", so here is a quick explanation:

 

Top:

An external temp probe is touching the side of the CPU core for a direct reading.

Bottom:

The built in motherboard probe takes a less direct reading from the bottom side of the CPU.

Ambient Temperature:
73.8F 23.2C

Volcano 6Cu+  1.4GHz @ 1.87v

Volcano 7
Heat Sink

CPU
Idle Top
CPU
Idle Bot.
CPU
Load Top
CPU
Load Bot.
Idle
Fan RPM
Load
Fan RPM
Before Probe Mod 84.4F / 29.1C 84F / 28.9C 124.5F / 51.4C 129F / 53.9C 3200 RPM 3600 RPM
After Probe Mod 83.7F / 28.7C 84F / 28.9C 119.3F / 48.5C 123F / 50.6C 3500 RPM 4900 RPM

Conclusion:

Well I think the temperatures speak for themselves, a solid 5F for something that takes only a couple minutes to do. When the temp probe is placed inside the heat sink it allows the fan to reach a much higher RPM, while at the same time when the machine is idle it will still spin at a slower RPM and run near silent.

Also if you don't like how the fan runs faster (and somewhat louder), it is just as simple to put the probe back how it was before.

Please, before attempting to do this mod, shut down your system completely and unplug the power (just to be safe).

Questions / comments / suggestions / rants / tips? Talk about it in the Overclockers Forum!

 

 

Back To The Main Page

 

 

Most Downloaded Files
Recently Added Files
Compare Prices On Top Brands!
Search:
For:

Intel Processors
Core i7 - Haswell
i7-4770K  i7-4771  i7-4790  i7-4770  i7-4790S  i7-4770S

Core i5 - Haswell
i5-4670K  i5-4690  i5-4690S  i5-4590S  i5-4570  i5-4460  i5-4590  i5-4440S  i5-4430  i5-4440

Core i3 - Haswell
i3-4340  i3-4370  i3-4350  i3-4360  i3-4330  i3-4130T  i3-4160  i3-4130  i3-4150

AMD Processors
Vishera 8-Core AM3+
FX-9590  FX-9370  FX-8370  FX-8370E  FX-8350  FX-8320  FX-8320E

Vishera 6-Core AM3+
FX-6350  FX-6300

Kaveri 4-Core FM2+
A10-7850K  A10-7800  A10-7700K  A8-7600

Video Cards
nVidia GeForce GTX 900 Series
GTX 980  GTX 970  GTX 960

nVidia GeForce GTX 700 Series
GTX 780  GTX 760  GTX 750

AMD Radeon R9 Series
290X  290  285  280X  280  270X  270

AMD Radeon R7 Series
265  260X  250X  250  240

Search By Brand
ASUS  Diamond  eVGA  Gigabyte  MSI  PowerColor  PNY  Sapphire  Visiontek  XFX  Zotac

PC Memory
DDR3  DDR2  DDR

Motherboards
ASUS  ASRock  Biostar  ECS  eVGA  Foxconn  Gigabyte  Intel  MSI  Shuttle  Supermicro  Tyan 

Hard Drives & SSDs
Corsair  Crucial  Fujitsu  HGST  Intel  OCZ  Samsung  Sandisk  Seagate  Western Digital

  Technology Magazines FREE to Qualified Professionals.
eWeek MagazineeWeek is the essential technology information source for builders of e-business. Focuses on e-commerce, communications and Internet-based architecture. Oracle MagazineOracle Magazine contains technology-strategy articles, sample code, tips, Oracle and partner news, how-to articles for developers and DBAs, and more. Dr. Dobb's JournalDr. Dobb's Journal enables programmers to write the most efficient and sophisticated programs and help in daily programming quandaries. InformationWeekInformationWeek is the only newsweekly you'll need to stay on top of the latest developments in information technology.
  Other Popular Titles: PC Magazine, BusinessWeek, Baseline, Business Solutions, Software Magazine, InfoStor, Security Source , TelevisionWeek, more...
Copyright 2000-2015 EXTREME Overclocking. All rights reserved.
Disclaimer of Liability - Privacy Policy