Max ram

gaz1971 · 20 Sep 2012 at 20:17

Why do OC sell 32gb kits of memory when the max you can use is 8gb in a 64bit system(unless Ive got it wrong)

CEUOTC · 20 Sep 2012 at 20:27

Here is the break down of what each 64 bit Win 7 OS can run:

Windows 7 Ultimate = 192 GB
Windows 7 Enterprise = 192 GB
Windows 7 Professional = 192 GB
Windows 7 Home Premium = 16 GB
Windows 7 Home Basic = 8 GB

Regards.

C.

Kaapstad · 20 Sep 2012 at 20:32

gaz1971 said:
Why do OC sell 32gb kits of memory when the max you can use is 8gb in a 64bit system(unless Ive got it wrong)

You got it wrong.

32bit os limits you around 3.5gbs

Win7 Home Basic 64bit limits you to 8gbs

Win7 Home Premium 64bit limits you to 16 gbs

Win7 Ultimate/Enterprise/Professional 64bit limits you to 192 gbs

gaz1971 · 20 Sep 2012 at 21:02

Ah thanks, I didnt know the different versions of 64 bit os allowed more memory. Does it matter what MB and cpu you have or can you just use those amounts of ram?

8 Pack · 20 Sep 2012 at 22:14

It does depend on what the CPU can address and the motherboard handle also yes.

Which board and CPU are you using????

gaz1971 · 20 Sep 2012 at 22:32

MB is a Z77 DS3H Gigabyte and cpu would be an Ivy of some sort

stulid · 20 Sep 2012 at 22:38

gaz1971 said:
MB is a Z77 DS3H Gigabyte and cpu would be an Ivy of some sort

Hopefully a Ivybridge with a "K" in its name with the unlocked multiplier so you can overclock it fully

bru · 20 Sep 2012 at 23:36

All of the Sandybridge and Ivybridge processors onboard memory controllers can only address 32Gb of ram, Sandybridge-E 64GB ram, previous gen i3, i5, i7 16Gb etc

so it works out like this.

socket 1156 max 16GB
socket 1366 max 24GB
socket 1155 max 32GB
socket 2011 max 64GB

Windows 7 Ultimate 192 GB
Windows 7 Enterprise 192 GB
Windows 7 Professional 192 GB
Windows 7 Home Premium 16 GB
Windows 7 Home Basic 8 GB
Windows 7 Starter 2 GB

gaz1971 · 21 Sep 2012 at 11:40

bru said:
All of the Sandybridge and Ivybridge processors onboard memory controllers can only address 32Gb of ram, Sandybridge-E 64GB ram, previous gen i3, i5, i7 16Gb etc

so it works out like this.

socket 1156 max 16GB
socket 1366 max 24GB
socket 1155 max 32GB
socket 2011 max 64GB

Windows 7 Ultimate 192 GB
Windows 7 Enterprise 192 GB
Windows 7 Professional 192 GB
Windows 7 Home Premium 16 GB
Windows 7 Home Basic 8 GB
Windows 7 Starter 2 GB

So there is a reason why 32gb is the max sold in kits, not the OS limitations, as I thought, but hardware limitations.