I have a 4GB 2x2GB kit of Kingmax DDR3 1333 at the moment. I'd like buy a 8GB 2x4GB kit, but my retailer does have only 4GB kits of 1333 Kingmax RAMs. I am thinking about 8GB kit of Kingston DDR3 1333. Could it cause issues to have two kinds of RAM kit in my motherboard?
Mixing two kinds of DDR3 kits
- Thread starter Arszi
- Start date
Solution
Yes, it can cause problems. The reason RAM is sold in "kits" to begin with is to guarantee the sticks of RAM in the kit will work together - they have been tested together. RAM of exactly the same part number but from a different batch sometimes won't with RAM from a different batch.
They different kits may work together or they may not. The motherboard will try to select parameters compatible with both kits. If that doesn't work you may be able to set parameters manually if the mobo has those options. It's possible they may work together at desired settings, or possibly lower settings that are compatible or, worst case, they may work together but not using DDR (Double Data Rate) which effectively cuts their speed in half. The latter possibility is know as "interleaved" memory and it recognizes all of the RAM but treats it as a single channel rather than a dual channel memory setup.
More info:
http://www.tomshardware.com/reviews/ddr-dram-faq,4154.html
http://www.hardwaresecrets.com/memory-upgrade/
http://www.hardwaresecrets.com/understanding-ram-timings/
http://www.hardwaresecrets.com/everything-you-need-to-know-about-the-dual-triple-and-quad-channel-memory-architectures/2/
They different kits may work together or they may not. The motherboard will try to select parameters compatible with both kits. If that doesn't work you may be able to set parameters manually if the mobo has those options. It's possible they may work together at desired settings, or possibly lower settings that are compatible or, worst case, they may work together but not using DDR (Double Data Rate) which effectively cuts their speed in half. The latter possibility is know as "interleaved" memory and it recognizes all of the RAM but treats it as a single channel rather than a dual channel memory setup.
More info:
http://www.tomshardware.com/reviews/ddr-dram-faq,4154.html
http://www.hardwaresecrets.com/memory-upgrade/
http://www.hardwaresecrets.com/understanding-ram-timings/
http://www.hardwaresecrets.com/everything-you-need-to-know-about-the-dual-triple-and-quad-channel-memory-architectures/2/
Tradesman1
Legenda in Aeternum
- Jun 5, 2013
- 67,883
- 40
- 126,960
No guarantees when mixing DRAM - my DRAM FAQ article is referenced above by Thx1138v2 , but on this topic look at the accompanying article Fiction, items 2-6 here:
http://www.tomshardware.com/reviews/ddr-dram-myths,4155.html
http://www.tomshardware.com/reviews/ddr-dram-myths,4155.html
From your own article you posted: "Mixed DRAM Runs At The Speed (Or Timings) Of The Slowest DIMM
Let’s say you have a DDR3-1600 CAS 9 DRAM module and you add one rated at 1866 CAS 9. One outcome is that the DRAM will go to the motherboard’s default of 1333 CAS 9 or 10 (or, many AMD motherboards default to 1066). Or, both will run at 1600 CAS 9 (or 10 or even 11) if DOCP, EOCP, XMP or AMP was enabled before you added the 1866 MT/s module.
But you can also manually set them to something else. Typically, in a scenario like this, I’d try 1866 at 10-10-10-27. Add a pinch of voltage to the DRAM (e.g., +0.005V). Depending on the results, you can also tune the MC voltage."
Let’s say you have a DDR3-1600 CAS 9 DRAM module and you add one rated at 1866 CAS 9. One outcome is that the DRAM will go to the motherboard’s default of 1333 CAS 9 or 10 (or, many AMD motherboards default to 1066). Or, both will run at 1600 CAS 9 (or 10 or even 11) if DOCP, EOCP, XMP or AMP was enabled before you added the 1866 MT/s module.
But you can also manually set them to something else. Typically, in a scenario like this, I’d try 1866 at 10-10-10-27. Add a pinch of voltage to the DRAM (e.g., +0.005V). Depending on the results, you can also tune the MC voltage."
TRENDING THREADS
-
News Firefox user loses 7,470 opened tabs saved over two years after they can’t restore browsing session- Started by Admin
- Replies: 19
-
-
-
-
Question HELP !!!!! My Desktop PC randomly sends monitors to standby???
- Started by EpicsGamer
- Replies: 7
-
T-Mobile Home Internet: Revisiting 5G connectivity for the home after two years
- Started by Admin
- Replies: 6
Facebook
Twitter
Instagram