Available Memory issue with Windows 7

Monstermunch · 22 Apr 2017 at 22:35

jpaul said:
a google shows many comments of this variety

I sure hope your new CPU cures your issue, but the missing memory problem is extremely common with i7-900 series CPUs in triple channel memory mode. Probably the most common issue people have with this platform. It comes and goes, I've seen hardware monitoring tools show different amounts for memory at the same time, and even on different tabs of the same too

(well over 95% of this type of failure are a single bent CPU socket pin)

double post

Monstermunch · 22 Apr 2017 at 22:50

jpaul said:
a google shows many comments of this variety

I sure hope your new CPU cures your issue, but the missing memory problem is extremely common with i7-900 series CPUs in triple channel memory mode. Probably the most common issue people have with this platform. It comes and goes, I've seen hardware monitoring tools show different amounts for memory at the same time, and even on different tabs of the same too

(well over 95% of this type of failure are a single bent CPU socket pin)

I did read several posts about the heatsink being attached too tightly affecting the triple channel cpu's and boards but seriously if that is the case or what you have mentioned I would think they need to re-think their product testing methodology before selling to consumers!

jpaul · 23 Apr 2017 at 07:34

or [Problem]*SOLVED* Asus P6T SE: triple channel RAM not working

Monstermunch · 23 Apr 2017 at 17:51

Well balls!

I guess I'll give that a try then, think I might ship it off as my new work PC and build myself a new one

ubersonic · 25 Apr 2017 at 09:38

OP, try putting 4GB sticks in DIMMs slots A1 and B1, plus 2GB sticks in DIMM slots A2 and B2. This should result in 12GB in dual channel running at the speed of the slowest sticks. The reason is it will be interesting to see if that still shows 8GB in Windows or the full 12GB.

Monstermunch said:
You can't mix sizes with the tri-channel stuff

This is incorrect. You can't run different sizes in different channels but you can run different sizes in the same channel, I.E 4GB+2GB in each channel.

Monstermunch said:
Tri channel boards do not boot with a single stick

Unless there is a board specific lockout, they should, the amount of channels the board supports is the maximum amount of channels you can use not the minimum.

ZXSpectrum · 25 Apr 2017 at 10:16

That board was a nightmare for ram compatibility. Corsair stuff was strange in it. It would work sometimes and then other times show wrong memory. IIRC at the time the Kingston memory seemed to cure the issues.