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Asus Rampage IV only runs 4 out off 8 GB?

Level 7
Just noticed that my rampage is only running at 4GB instead off 8GB. I removed ram and had a play with different slots but still only showed up as 4GB.

All 4 stick's are showing up in bios at 13333mhz.

Any suggestions?

Level 7
I had a similar Issue with 4x 4GB on the RIVE board a while back. I simply re-seated the CPU as not all pins were making contact.

This has since solved my issue. Give it a try. Hope this helps..
Case: Coolermaster HAF 932 | MB: Rampage IV Extreme | CPU: Intel Core I7 3930k @ 4.8Ghz | RAM: 16GB G.Skill Ripjaws 2133 | GPU: 2x Asus GTX670 DCII OC 2GB | HDDs: Samsung EVO 250GB + Crucial M4 128GB + Intel X25-M 80GB + 3x WD 1TB | ODD: Asus DRW-24B1LT | PSU: Seasonic X -750W | Cooling: H100 with SP120 Fans push/pull

Level 7
Hrrm, that will be a major pain to do that, to move all the pipes and water cooling gear out the way to reach the cpu. Any other options?

Level 40
I would say the same as Hooligan...check CPU contact...make sure cooling is not displacing CPU. I presume you have tested a known working stick in each red slot? The stick shows up in each slot?

Level 7
What version of windows are you running as well?