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Ivy Bridge Memory Controller/ Motherboard Support?

post #1 of 4
Thread Starter 
Since it's been confirmed that any motherboard using the H,P, and Z chipsets for 1155 (with a BIOS update) can run Ivy Bridge, I have a question regarding the memory controller on the die and how it relates to the motherboard. Most H,P,Z motherboards natively support 1333mhz DDR3, with any speed above that being an overclock option on the motherboard (including the XMP profile). So if the motherboard 'supports' 1333, but an Ivy Bridge cpu is added to the board, wouldn't that raise the theoretical memory speed limit on the board since the memory controller is on the CPU? I'm trying to figure out if my 1600mhz DDR3 will run natively if my board supports Ivy Bridge with a BIOS update - I'm not in the mood to buy another motherboard.
post #2 of 4
interesting question that im curious about but have a thoery that probably is incorrect lol.. i just picked a board at random the Asus P8Z68-V PRO

looking at the specifications and this line
Quote:
4 x DIMM, Max. 32GB, DDR3 2200(O.C.)/2133(O.C.)/1866(O.C.)/1600/1333/1066 MHz Non-ECC, Un-buffered Memory

So we know that a Sandy bridge cpu natively support 1333mhz DDR3 whilist Ivy bridge cpus natively support 1600mhz DDR3
but looking at the quote and particuly the part in bold, are these the mobos native RAM speeds and non-native speeds are subceeded with O.C??

http://www.asus.com/Motherboards/Intel_Socket_1155/P8Z68V_PRO/#specifications smile.gif
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Going to be chaep
(16 items)
 
Wife's Rig
(12 items)
 
 
CPUMotherboardGraphicsRAM
i7-3770k Gigabyte GA-Z77X-UP5 TH MSI GTX460 G.Skill TridentX 2400 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
Plextor M5p 128GB 2 x WD 500GB Blues LG Prolimatech Megahalems Rev C 
CoolingOSMonitorPower
Arctic F12 CO PWM x 2 Push/Pull Windows 7 64 bit Ultimate LG IPS235V Corsair AX850 
Case
Coolermaster HAF 912 advanced (Asia version) 
CPUMotherboardGraphicsRAM
I5-3570K Gigabyte Z68X-UD3H-B3 Inno3D Ichill GTX660 8GB G.Skill RipjawsX 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 830 128GB WD black 500GB Liteon Coolermaster Hyper 212+ EVO 
OSMonitorPowerCase
Win 7 ultimate Samsung Syncmaster 932gwe+ OCZ ZT series 550W Coolermaster 410 
CPUMotherboardRAMHard Drive
1.67Ghz Atom stock 1GB DDR2 2 x 500GB Western Digital Cavier Blacks [RAID 1] 
CoolingOSPowerCase
stock DSM3.2 [built on linux] stock stock 
OtherOther
Synology DX510 Expansion unit 5 x 1TB WD Cavier Blacks in a RAID 6 
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post #3 of 4
Thread Starter 
In all cases of SB [including your ASUS], any speed over 1333mhz is a technical overclock. Even though the RAM is rated at that speed, SB only allows 1333 as a theoretical limit. IB on the hand goes significantly higher, rated at a max of 2133.

So the question remains; is it a motherboard limitation or a CPU limitation. Motherboards that don't allow OC'ing only stick with listing a 1333 standard, so I'm wondering if the BIOS update that allows for the processor upgrade also bumps up the RAM spec.
post #4 of 4
Thread Starter 
Bump. I'm curious as to if anyone knows the answer.
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