a slightly stupid question but may be important
- Thread starter dazbizkit
- Start date
Slightly stupid? You can't mix different types of memory while still being able to mix different speeds on some occasions as well as different sized dimms. On a system where DDR400 is backward compatable and mixed with DDR333 you would install the faster dimm in Slot #0 or #1 depending on how the board is labeled. Mixing single sided with dual sided dimms however is out of the question. That would stall the system from even booting properly in most cases. It would be rare to see a system with 184 pin dimms accept a 240pin model however. DDR2 is a newer type of memory incompatable with DDR memory even though the board may run both types separately.
liquidshadow
New Member
Well, you didn't have to reply that way.PC eye said:
And as everyone has said, no you cannot mix DDR and DDR2
And where is a board that can run "both types separately"?
Camper said:
You got correct there. The main problem was choosing which one to go with on the crossover type board there. You could still run your old memory when upgrading or choose the new line. But it's still far better to go with one that will still run DDR or select a DDR2 board and make the incremental leap. There weren't too many of the crossover type boards made fortunately. Usually the specs were.... you know the rest.
dark_legacy2006
New Member
no they cant be mixed but some computers have optional slots ex.. 2 ddr slots and 2 ddr2 slots only one type of memory can be used at a time
That's precisely correct. Only one type whether it's DDR or DDR2 you can't mix types and see any good results. Those boards only allowed both types to used by choosing one or the other. Plus you usually can't mix single with dual sided dimms on most systems as well. Those are also two different types while being in the same catagory and same speed. Most strongly recommend using matched pairs when adding multiple dimms if not out of the same batch of memory for compatibility issues as well. The closer you keep them together the better performance and stability is the thought there.
liquidshadow
New Member
If you read carefully, he said run both types: DDR and DDR2...PC eye said:
I do know what crossover is but I don't think there are any DDR/DDR2 crossover boards.
liquidshadow said:
That's like saying there are no AGP/PCI-Express crossover boards either. I haven't specifically seen one while not ruling someone having made one usually under a generic brand name. You simply would have to choose which memory type would be run even though both types could be used on the same model/type board. You simply would run this or that not both ever. The board would have jumpers if not a specific bios programming there to switch the type used by disabling the other. A crossover type board if any would be usually be seen in server not desktop cases for allowing infield servicing where the type could be changed instantly to keep a network going. That circumstance would be a commercial application not home user type.
m0nk3ys1ms
Active Member
Jet said:
there's more than one, their are several. they have 2 ddr slots, and 2 ddr2 slots.
"Gigabyte Releasing DDR to DDR2 Converter
By Justin Mann, TechSpot.com
Published: August 19, 2005, 11:02 AM EST
Often a stumbling block on the upgrade path is lack of backwards compatibility. If you are not willing to buy an entirely new machine, but choose to do it part by part, you still often have to change the motherboard, CPU, and RAM at the same time because of the sockets and interfaces used. Newer P4 boards, and soon newer Athlon boards, have DDR-2 memory interfaces. There are a few that have both DDR and DDR2, but they are being discontinued by Intel. Gigabyte is giving users a path to combat that. Their new PT880-Pro motherboard actually comes bundled with a converter that lets you plug in a DDR stick into a DDR-2 slot.
There is more behind this than just tricky wiring. DDR-2 has much different timings and voltage as compared to DDR. It is worthy to note that DDR2-667 pretty much out performs DDR400 to a degree, but you can get fairly fast DDR modules, PC4000 and up. If this board lets you clock DDR much higher than 200mhz, overclockers may have a dream come true in the GA-PT880Pro." http://www.techspot.com/news/18423-Gigabyte-Releasing-DDR-to-DDR2-Converter.html
Here was one article on converting DDR to DDR2 speeds. But a link for a model that can run both types would help dispell the disbelief some have. A look at newegg.com revealed this Gigabyte model. http://www.newegg.com/Product/Product.asp?Item=N82E16813128250
By Justin Mann, TechSpot.com
Published: August 19, 2005, 11:02 AM EST
Often a stumbling block on the upgrade path is lack of backwards compatibility. If you are not willing to buy an entirely new machine, but choose to do it part by part, you still often have to change the motherboard, CPU, and RAM at the same time because of the sockets and interfaces used. Newer P4 boards, and soon newer Athlon boards, have DDR-2 memory interfaces. There are a few that have both DDR and DDR2, but they are being discontinued by Intel. Gigabyte is giving users a path to combat that. Their new PT880-Pro motherboard actually comes bundled with a converter that lets you plug in a DDR stick into a DDR-2 slot.
There is more behind this than just tricky wiring. DDR-2 has much different timings and voltage as compared to DDR. It is worthy to note that DDR2-667 pretty much out performs DDR400 to a degree, but you can get fairly fast DDR modules, PC4000 and up. If this board lets you clock DDR much higher than 200mhz, overclockers may have a dream come true in the GA-PT880Pro." http://www.techspot.com/news/18423-Gigabyte-Releasing-DDR-to-DDR2-Converter.html
Here was one article on converting DDR to DDR2 speeds. But a link for a model that can run both types would help dispell the disbelief some have. A look at newegg.com revealed this Gigabyte model. http://www.newegg.com/Product/Product.asp?Item=N82E16813128250