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[Memory installed 8GB (7,49GB usable)]
This is normal as the videocard is onboard and needs memory too.There is nothing wrong with the board.If you plug a videocard in it will free the onboard videocard and thus the needed memory for it.
Mem installed 8GB ( you can use only 3,47GB)
Ah ok, so not all modules are seen.Check the CPU for bent pins, as the memory controller is inside the CPU.Else try some el-cheapo memory, as we seen all to many problems with Gskill.Typical this means bad memory. Windows XP and Vista used to crash over this, Windows 7 simply avoids the bad memory and runs.In short, borrow some known to be good memory from a friend and plug that in, see what happens.
If all modules are seen all memory is accounted for, there is something else the matter.The memory you link to seems not to be sold in kits, but as single pieces. Then Dual Channel etc. may not work. You could try lowering the speed in MHz, but likely your sticks are to different from one-another.Here is another good thing from that link:"I have two Corsair Memory modules that work fine together but when I add two more modules of the matching part number, they won’t work.Each kit of Corsair Memory is tested to run at its advertised settings in the configuration in which they are sold. If you purchase a 4GB kit (2x2GB), then we can only guarantee its performance and compatibility when using it as a single kit. To ensure the best results with more than two memory modules installed in the same system, it is best to get a kit which has been tested to run in that configuration.While it is defintiely possible that two kits would run together in the same system, there is a chance that you may need to reduce the speed of the memory due to motherboard chipset limitations when populating more than one memory module per channel on the board. If you have problems mixing sets, it is suggested to manually lower the frequency of the memory."
Since when RAM that is not sold in kits may not work? If that was the case, more than half the users (and I dare to say more) could have issues.
Been that way for several years now. And yes, many do have issues. Different batch, different maker's chip , even with the package having the identical label may not work together. The manufacturer of your RAM even has disclaimers (as well as other manufacturers) against mixing two kits of the same.
Two motherboards, right. And they did not work with the memory you chose, whichever memory that was? Sure it is not the other way around?
Note: We test it dual and single channel, it show normal.Posted: Jan 19, 2012 by MSI