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VRM temps

post #1 of 8
Thread Starter 
I am OCing my 2600K, and so far I have hit 4.80 GHz with VCore @ 1.45v with a max temperature of 75 C with Prime95. It fails at 1.40v.

My question is, for people who keep an eye on all their temperatures, what kind of temperatures do you see on your VRMs? Particularly those with fewer phases...

I use a 3.5" drive bay monitor, and it goes up to 90 degrees C. So at full load, I actually hit that cap with this 4-phase board!

I know these (and most other) MOSFETs are designed to run up to 150C and higher, but obviously we want to keep them as low as possible.

Obviously the answer is to "get a better motherboard" with more phases, but I am just curious what people have experienced, and how this affects longevity
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post #2 of 8
stick a small 60mm fan on the heatsink. I use zip ties or 2 sided tape usually, but I always have a fan jerry rigged to the boards heatsinks...
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post #3 of 8
Thread Starter 
Yeah I was just more curious about what other people see for VRM temperatures
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post #4 of 8
actually even high quality solid capacitors are only rated for 100-110c. You have 2 options, lower you OC, get a waterblock, or get a new mobo (gigabyte UD7 has 24 phase)
post #5 of 8
Thread Starter 
Yeah the caps and chokes aren't getting very hot at all, it's the transistors that generate the most heat
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post #6 of 8
I wouldn't go above 1.4V for 24/7 use, to be honest. 1.5 is the max, so I guess your in the middle.

When you say it wouldn't pass at 1.4V, did you just bump it up to 1.45V? Try going in .005 increments and checking to see what passes and what does not.

As for your question, put a nice fan on it, like already suggested
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by bennoculus View Post
I wouldn't go above 1.4V for 24/7 use, to be honest. 1.5 is the max, so I guess your in the middle.

When you say it wouldn't pass at 1.4V, did you just bump it up to 1.45V? Try going in .005 increments and checking to see what passes and what does not.

As for your question, put a nice fan on it, like already suggested
Actually I am just getting started pretty much. I am using auto voltage with Gigabyte's load line calibration profiles. Profile 2 (or whatever it's called) brings the voltage up to 1.45v at load, and it is stable overnight. Profile 1 only lets it go up to 1.40v, and it fails pretty much immediately. I haven't even touched manual voltage settings yet, so I'll see if I can get it to stick at 1.40v if possible

The VRM is quite hot though. On my Intel P67 board, which also has a 4 phase VRM but with larger heatsinks, the transistors only reach around 50-60 celsius at load. But that board is only stable up to 4.7 GHz, and it wants to use WAY more voltage (with low vdroop it sends 1.5v or more to stay stable at 4.7 GHz!)
It's my PC
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Core i7 2600K @ 4.8 Gigabyte Z68XP-UD4 XFX Radeon R9 280X 16GB Crucial Ballistix Tactical DDR3 1600 MHz 
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It's my PC
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Core i7 2600K @ 4.8 Gigabyte Z68XP-UD4 XFX Radeon R9 280X 16GB Crucial Ballistix Tactical DDR3 1600 MHz 
Hard DriveHard DriveHard DriveCooling
Intel DC-S3700 800GB SSD (Downloads/Media) Intel DC-S3500 480GB SSD (Install Drive) OCZ Vertex 3 240GB SSD (Windows Drive) be quiet! Shadow Rock TOPFLOW 
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post #8 of 8
Thread Starter 
Looks like 1.45 VCC is what this CPU needs to run at 4.8. Unfortunately, this board doesn't seem to be capable of handling that load. The VRM gets hotter and hotter during stress testing. How much over 90 C I am not sure. But it eventually got to the point where after 40 mins of Prime, it just shut down. So I assume the MOSFETs hit their 150 C shutdown trigger. Yikes!

Backed it down to 4.6, which is 1.37V. We'll see how hot these things get now. Yeow!
It's my PC
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CPUMotherboardGraphicsRAM
Core i7 2600K @ 4.8 Gigabyte Z68XP-UD4 XFX Radeon R9 280X 16GB Crucial Ballistix Tactical DDR3 1600 MHz 
Hard DriveHard DriveHard DriveCooling
Intel DC-S3700 800GB SSD (Downloads/Media) Intel DC-S3500 480GB SSD (Install Drive) OCZ Vertex 3 240GB SSD (Windows Drive) be quiet! Shadow Rock TOPFLOW 
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It's my PC
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CPUMotherboardGraphicsRAM
Core i7 2600K @ 4.8 Gigabyte Z68XP-UD4 XFX Radeon R9 280X 16GB Crucial Ballistix Tactical DDR3 1600 MHz 
Hard DriveHard DriveHard DriveCooling
Intel DC-S3700 800GB SSD (Downloads/Media) Intel DC-S3500 480GB SSD (Install Drive) OCZ Vertex 3 240GB SSD (Windows Drive) be quiet! Shadow Rock TOPFLOW 
OSMonitorKeyboardPower
Windows 8 Pro Samsung PX2370 23" 1080p Topre RealForce 87U Thermaltake ToughPower 750W 
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