nhorlock Posted October 15, 2011 Share Posted October 15, 2011 I have a Gigabyte P55-UD6 motherboard and have installed the above module but only 8G is usable. All 16G is seen but only 8GB is actually enabled by the BIOS. I have tried all manner of things form starting with 8GB enbaling XMP and then adding the other through to tweaking voltages manually but all to no avail. Any suggestions as to what I am doing wrong here? The memory is supposed to be compatible, I have ried all the combinations of slots suggested by the Gigabyte manual. All the modules individually are working Link to comment Share on other sites More sharing options...
nhorlock Posted October 16, 2011 Author Share Posted October 16, 2011 I have been experimenting further today. I started by removing all the Corsair RAM and replacing it with the previous 8GB ******** Value RAM (4x2GB) This gave the expected 8GB and looked as follows in the bios summary page I removed the 2G dimms from the White socket and inserted 4G Dimms in their place (The P55-UD6 has 3 sockets per channel, 1 white, 2 blue, the white must be populated in all configurations) 12GB was detected and Win 7 ran up. I cannot be certain it would be stable of course, we have two very different specifications of RAM in, however it has demonstrated that 4G is working in the white in a 4 dimm configuration This is shown in image 2 Next step was to switch the banks around. 2G valueram in the white slots, vengeance in the same 2 blue slots This is show in image 3 and was also absolutely as expected. Next I switched the remaining 2G pair of Dimms out for the other 4G dimms. The result was an immediate drop in available memory. As you can see form the summary page image, the BIOS seems in a state of confusion. I can find little to no documentation on the "enabled slot" display. but clearly it should be aligned to the DIMM as per the previous images. Finally, I dropped out two of the 4G and started with just a pari of 4G Dimms This worked perfectly and was repeated for all 4 DIMMS This makes no sense to me at all. Any advice most welcomed. Link to comment Share on other sites More sharing options...
nhorlock Posted October 18, 2011 Author Share Posted October 18, 2011 The problem has been identified as a faulty DIMM. DEspite having had 16GB working briefly during the various tests one fo the DIMMs is consistently failing. The set are being RMA'd to Amazon. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 19, 2011 Corsair Employees Share Posted October 19, 2011 NP; sorry that happened and please let us know when you get the replacements. Link to comment Share on other sites More sharing options...
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