Overclock.net › Forums › Components › Memory › DDR2 and DDR3 Motherboard support
New Posts  All Forums:Forum Nav:

DDR2 and DDR3 Motherboard support

post #1 of 4
Thread Starter 
Hi

Recently looking in buying a new mother board for an old pc (Not that old but still old), I have been looking into the options and found a motherboard that supports DDR2 as well as DDR3. My question is would the motherboard support these 2 different rams running together?

More Info:

Asus P5KC

Memory Specifications:

2 x DIMM, Max. 4 GB, DDR3 1333(O.C.)/1066/800 Non-ECC,Un-buffered Memory
Dual Channel memory architecture
4 x DIMM, max. 8GB, DDR2 1066*/800 / 667 MHz, non-ECC, un-buffered memory
Dual channel memory architecture
*The chipset officially supports the memory frequency up to DDR3 1066MHz/DDR2 800. Due to the tuning by ASUS exclusive technology, this motherboard natively supports up to DDR3 1333/DDR2 1066MHz. Please refer to www.asus.com or user manual for Memory QVL

Can it or not?

~Thanks
post #2 of 4
I couldn't find anything definitive about this for the Asus P5KC motherboard or its Intel P35 chipset, but the manual for the MSI P35 Neo Combo motherboard, which uses the same chipset, says you cannot run DDR2 and DDR3 together:

"Meanwhile, you are not able to boot up your system if you install DDR2 & DDR3 memory modules simultaneously."

That's typical of combo motherboards because usually all the memory sockets have most of their wires connected together, but the signals for DDR2 work at 1.8V while DDR3 uses 1.5V. So I don't think there's a motherboard that allows two types of memory to be used simultaneously, unless it's a server board with completely separate sets of DIMM sockets, or it's an ancient Socket 7 motherboard -- I think SiS produced some chipsets that allowed both 5V SIMMs and 3.3V DIMMs to run together
post #3 of 4
What's the current specs of the rig? And no you can't use both at the same time.
Junkyard
(18 items)
 
NAStradamous
(12 items)
 
HTPC01
(16 items)
 
CPUMotherboardGraphicsRAM
Intel i5 2320 @ 3.1GHz MSI B75MA-E33 HIS HD7970 3GB @ 1050 / 1700, 1.17v Patriot 2x4GB DDR3-1066 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 256GB WD Green 2TB DVDRW Corsair H50 Push / Pull 
CoolingOSMonitorMonitor
NZXT 120mm fans strapped to stock 7970 cooler Windows 10 Pro Dell 3007WFP Dell 2007FP 
MonitorKeyboardPowerCase
Dell 2007FP Cheap Toshiba (R.I.P. Ducky) PC Power & Cooling Silencer MKIII 950w Cheap Garbage (free) 
MouseAudio
Logitech G602 Yardsale Special 
CPUMotherboardGraphicsRAM
Intel Core i5 3330 Asus H61 MSI GTX 750Ti Low Profile 2x4GB Hynix DDR3-1333 
Hard DriveHard DriveOptical DriveCooling
60GB Kingston SSD 1TB Seagate Samsung DVDRW CoolerMaster Gemin II 
OSMonitorKeyboardPower
Windows 8.1 + Steam Big Picture / Plex HT 50" Insignia LED 1080p Logitech Rosewill Green 530w 
CaseMouseAudioOther
Silverstone HTPC Logitech Pioneer 2.0 tower speakers + 135w RMS Rosewill MCE Remote 
  hide details  
Reply
Junkyard
(18 items)
 
NAStradamous
(12 items)
 
HTPC01
(16 items)
 
CPUMotherboardGraphicsRAM
Intel i5 2320 @ 3.1GHz MSI B75MA-E33 HIS HD7970 3GB @ 1050 / 1700, 1.17v Patriot 2x4GB DDR3-1066 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 256GB WD Green 2TB DVDRW Corsair H50 Push / Pull 
CoolingOSMonitorMonitor
NZXT 120mm fans strapped to stock 7970 cooler Windows 10 Pro Dell 3007WFP Dell 2007FP 
MonitorKeyboardPowerCase
Dell 2007FP Cheap Toshiba (R.I.P. Ducky) PC Power & Cooling Silencer MKIII 950w Cheap Garbage (free) 
MouseAudio
Logitech G602 Yardsale Special 
CPUMotherboardGraphicsRAM
Intel Core i5 3330 Asus H61 MSI GTX 750Ti Low Profile 2x4GB Hynix DDR3-1333 
Hard DriveHard DriveOptical DriveCooling
60GB Kingston SSD 1TB Seagate Samsung DVDRW CoolerMaster Gemin II 
OSMonitorKeyboardPower
Windows 8.1 + Steam Big Picture / Plex HT 50" Insignia LED 1080p Logitech Rosewill Green 530w 
CaseMouseAudioOther
Silverstone HTPC Logitech Pioneer 2.0 tower speakers + 135w RMS Rosewill MCE Remote 
  hide details  
Reply
post #4 of 4
No, you can't use DDR2 and DDR3 at the same time.

It's best to use DDR3, but you are limited to 4GB. You can not use 2 x 4GB.

DRAM Frequency will only be as fast as your CPU FSB.

If you need 8GB, stick with DDR2.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Memory
Overclock.net › Forums › Components › Memory › DDR2 and DDR3 Motherboard support