Need help please Ram not working

[Hammersdawn]

Hi All,

I have just experienced a similar issue, and reading this thread thought it relevant to add to it rather than create a new thread.

The Issue:
System Spec
Case: NZXT Phantom
MoBo: ASUS Rampage IV Extreme (3301)
CPU: Intel Core i7 3930K
CPU Cooler: Corsair H100i
Memory: Corsair Dominator Platinum 16GB(4x4GB) DDR3 2400Mhz
GPU: ASUS nVidia GeForce GTX 690 4GB
SSD1: Samsung 840 Pro 256GB
SSD2: Crucial M4 256GB
SSD3: Crucial C300 256GB
Monitor: Samsung SA950 (1920x1080)

1. Yesterday evening I changed my CPU cooler from an Antec KÜHLER FLOW to the Corsair H100i, a very simple process without any installation issues.
2. Following the installation booted up and immediately was prompted "new processor installed" entered bios, set memory profile to XMP 2400, minor overclock to 4.3, checked the balance of settings, saved and restarted.
3. Immediately afterwards system would power but not post, manually reset bios system posted however noted that the system was now only showing 12GB Ram, and a message saying "Overclock failed".
4. Entered Bios, left default settings, saved and exited, system booted normally however only 12GB Ram.
5. Shutdown system and reseated all my modules, booted up but no luck only showing 12GB.

Note* Ram seating prior to any issues, A1-B1-C1-D1

6. Following manual slot testing it appeared C1 was not recognising the module.
7. Reseated Ram to A1-A2-B1-B2
8. Boot up 16GB detected, entered BIOS enabled XMP 2400 with 4.3 Overclock
9. Booted into Windows and ran Burn Test and other benches without issue
10. Ran Memtest - 100% pass
11. Shutdown, cold start - Bios post "Overclock Failed"
12. Reset BIOS, again XMP 2400, 4.3 Overclock, save restart, repeat all tests - 100% success
13. Shutdown, cold start - Bios post "Overclock Failed"

Now I am scratching my head, standard restarts no issue, cold start "Overclock Failed"

Anyone have any ideas, firstly why C1 would just stop working, secondly "Overclock Failed"

One last note, prior to new H100i installation, system has been stable with XMP 2400 and 4.3 Overclock for around 12 months.

[HiVizMan]

Oh yes one Pin can cause heaps of hassles.

The trick with pins is to use a very sharp blade, like a razor blade or a thin utility blade. Gently place the edge under the bent pin and lift up, release and repeat. Small steps as the pin is spring loaded and will need to be coaxed into the correct position.