12 Replies Latest reply: Jun 17, 2012 11:38 AM by AGluk RSS

Issues with DH77EB (BIOS 0071) and Core i5 3550

bluebomber Community Member
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Hi everyone,


I recently assembled my own desktop PC with the following components:


Intel Core i5 3550 processor

Intel DH77EB uATX motherboard

Intel 330 120GB SSD

Corsair TX650 V2 PSU

Corsair Vengeance 8GB (2x4GB) PC3-12800 DDR3-1600 CL8 RAM

Sapphire Radeon HD 7850 graphics card

ASUS PCE-N15 wireless network adapter

Cooler Master 120mm 2000rpm exhaust fan

Silverstone Temjin TJ08B-E uATX case


Everything is functioning now for the most part, but I have the following questions:


1. When I started the PC for the first time, I flipped on the PSU switch and powered on the PC. I could see that the motherboard light was on, but after starting the fans for a split-second, the machine shut off. After a few attempts, I realized that I had missed the 2x2-pin 12V connector from the PSU to the motherboard. After plugging it in, my PC started up. The manual states that failure to plug in the 12V connector "may cause damage to the board". Should I be worried? Everything seems to work, but I'm not sure if there's any underlying damage to the motherboard and/or other components. Is there a tool to check the health of all components?


2. I notice that when I perform a cold start on the PC, the CPU fan does not start immediately. For the first 5 seconds or so, the fan will perform two "false starts", followed by full acceleration to ~3000RPM, and then a slow-down to the normal ~1000RPM. Is this behaviour normal? I ask because I've never experienced this before with a CPU fan and I worry that the delay in fan activation may cause damage to the CPU due to excessive heat.


3. Although I purchased and installed DDR3-1600 RAM, Intel Desktop Utilities (IDU) reported a speed of 1333MHz. I tried switching the RAM timings profile in the BIOS to XMP (and it showed timings 8-8-8-24 with speed of 1600MHz in the BIOS). When I return to IDU, however, the RAM is still reported at 1333MHz. Am I doing something wrong?


4. I updated the BIOS (from 0053 to 0071) thinking the new release might fix some of the issues I was having. After updating to BIOS 0071, I noticed that my Cooler Master 120mm fan outlet (exhaust) speed is constantly at 100% (2000RPM). Prior to the update, it ran at ~1000RPM. I attempted to adjust the outlet fan speed in the BIOS, but doing so had no effect whatsoever. Is this a known issue? Is there a way I can adjust the outlet fan speed?


5. Additionally, after updating the BIOS, IDU no longer detects my system. When I start IDU, the spinning image (loading image) continues to spin and doesn't stop. Is this a known issue? Is there a way to have IDU detect my system again?


Thanks in advance and any help is greatly appreciated.





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