Does one of the three DDR3 sticks fall off stably?

Question

Iron

The car:

• MB: Asus P6T WS Pro X58 1366 and ASUS P6T SE
  
• CPU: i7 920
  
• GPU: GF GTX275 Gigabyte
  
• RAM: DDR3 6Gb (3x2Gb) PC3-10666 1333MHz DIMM Corsair XMS3 Classic, 9-9-9-24, Corei7 support, TR3X6G1333C9
  
• 700W PSU, 500Gb Seagate hard drive
  

When downloading, it determines all 6 Gb, but it's worth rebooting after 10 minutes. work as one plank disappears somewhere. Swapped the straps - same thing.
I took the memory to the store - they ran memtest for half an hour - 0 errors, all the strips are determined.
I changed the motherboard to ASUS P6T SE - the same story.
When loading Windows 7 64 Pro, the system freezes for about 20 minutes, after a reboot it seems to work normally (with 4 Gb), but not as it should (subjectively).
It is not yet possible to take the entire box to the service - it works all the time, albeit poorly.
I would appreciate any advice, please help.

Answer 1

Memory voltage 1.65V?

Answer 2

It is necessary to loosen the clamp of the cooler. Or vice versa, press harder. The problem is known. There are details on overclockers.

Answer 3

I would install SpeedFan and check for system overheating.

Answer 4

Interesting glitch! Put "OCCT Perestroika" and run CPU and memory tests, there may be a banal overheating, and a power supply. At the end of the test, carefully study the nutrition and temperature charts.
I exclude motherboard glitches. you changed it, if there are glitches after the test, just in case, reset the BIOS settings to Safe Default and test again.

Answer 5

Although they write that this is the problem of the asus. It is advised to change the memory (to the memory of another manufacturer), reset overclocking or take a motherboard from another manufacturer.