Since I just tried this a few days ago, I'd thought I'd report my findings.
Test bed: Late 2008 Macbook Aluminum, DDR3 PC3-8500 RAM (1067MHz)
Tested RAM: DDR3 PC3-10600 (1333MHz)
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Original RAM: Bank 0/1GB 1067
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Original RAM:
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Bank 0/1GB 1067
Bank 1/1GB 1067
Remove both sticks of 1067 RAM. Install 2GB 1333 in Bank 0. Reboot - successful; all systems function normally. Swap 2GB 1333 to Bank 1. Reboot - successful; all systems function normally.
Mixed RAM:
Bank 0/2GB 1333
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Bank 1/1GB 1067
Reboot - NO BOOT
swapped slots
Bank 0/1GB 1067
-
Bank 1/2GB 1333
Reboot - NO BOOT
-
Remove 1067 RAM. Reboot - successful; all systems function normally.
+
Remove 1067 RAM. Reboot with 1x2GB 1333 - successful; all systems function normally.
-
Reinstall 2x1gb 1067. Reboot - successful; all systems function normally.
+
Reinstall 2x1GB 1067. Reboot - successful; all systems function normally.
At least for the RAM I had (2x1GB 1067 Apple stock Samsung; 2GB 1333 HP stock Hynix), the system boots with all 1067 RAM or all 1333 RAM, but it will not boot if the two are combined. I have installed 2x2GB 1067 in the Macbook now, and I have 2x4GB 1067 arriving this week; I'll retest combinations with the 2GB 1333 and repost as soon as possible.
Since I just tried this a few days ago, I'd thought I'd report my findings.
Test bed: Late 2008 Macbook Aluminum, DDR3 PC3-8500 RAM (1067MHz)
Tested RAM: DDR3 PC3-10600 (1333MHz)
Original RAM: Bank 0/1GB 1067
Bank 1/1GB 1067
Remove both sticks of 1067 RAM. Install 2GB 1333 in Bank 0. Reboot - successful; all systems function normally. Swap 2GB 1333 to Bank 1. Reboot - successful; all systems function normally.
Mixed RAM:
Bank 0/2GB 1333
Bank 1/1GB 1067
Reboot - NO BOOT
swapped slots
Bank 0/1GB 1067
Bank 1/2GB 1333
Reboot - NO BOOT
Remove 1067 RAM. Reboot - successful; all systems function normally.
Reinstall 2x1gb 1067. Reboot - successful; all systems function normally.
-
At least for the RAM I had (2x1GB 1067 Apple stock Samsung; 2GB HP stock Hynix), the system boots with all 1067 RAM or all 1333 RAM, but it will not boot if the two are combined. I have installed 2x2GB 1067 in the Macbook now, and I have 2x4GB 1067 arriving this week; I'll retest combinations with the 2GB 1333 and repost as soon as possible.
+
At least for the RAM I had (2x1GB 1067 Apple stock Samsung; 2GB 1333 HP stock Hynix), the system boots with all 1067 RAM or all 1333 RAM, but it will not boot if the two are combined. I have installed 2x2GB 1067 in the Macbook now, and I have 2x4GB 1067 arriving this week; I'll retest combinations with the 2GB 1333 and repost as soon as possible.
Since I just tried this a few days ago, I'd thought I'd report my findings.
Test bed: Late 2008 Macbook Aluminum, DDR3 PC3-8500 RAM (1067MHz)
Tested RAM: DDR3 PC3-10600 (1333MHz)
Original RAM: Bank 0/1GB 1067
Bank 1/1GB 1067
Remove both sticks of 1067 RAM. Install 2GB 1333 in Bank 0. Reboot - successful; all systems function normally. Swap 2GB 1333 to Bank 1. Reboot - successful; all systems function normally.
Mixed RAM:
Bank 0/2GB 1333
Bank 1/1GB 1067
Reboot - NO BOOT
swapped slots
Bank 0/1GB 1067
Bank 1/2GB 1333
Reboot - NO BOOT
Remove 1067 RAM. Reboot - successful; all systems function normally.
Reinstall 2x1gb 1067. Reboot - successful; all systems function normally.
At least for the RAM I had (2x1GB 1067 Apple stock Samsung; 2GB HP stock Hynix), the system boots with all 1067 RAM or all 1333 RAM, but it will not boot if the two are combined. I have installed 2x2GB 1067 in the Macbook now, and I have 2x4GB 1067 arriving this week; I'll retest combinations with the 2GB 1333 and repost as soon as possible.