gema.b Posted August 9, 2013 Share Posted August 9, 2013 I have bought my new PC about a year ago with 16 gigs of ram according to its description (BIOS, Windows az CPU-Z showed the same). Recently I opened the case for the first time and found out that there are four Corsair Vengeance 8GB (2x4GB) RAM modules installed in the motherboard which makes 32 gigs in total. The RAM modules are identical (CMZ8GX3M2A1600C9). Checked the detais of each slot in CPU-Z and it showes that there are four 4 gigs modules installed. The settings in BIOS are corresponding the manual of the RAM (1600 MHz, 9-9-9-24 timing and 1.5 V voltage). My motherboard is Asus P9Z77-M with 3rd gen. i7 processor and 64 bit windows 7. According to the manual of the motherboard, the RAM modules are supported. I know that these modules are dual sided, but theoretically the motherboard has to be able to handle both sides, so recognize 32 gigs of RAM in total. (The maximal installable memory is 32 gigs as well.) I tried to google this problem but did not found any useful advice, so if someone could explain to me why the system only sees 16 gigs and what can I do about it, I would be really glad. Thank you in advance! Link to comment Share on other sites More sharing options...
peanutz94 Posted August 9, 2013 Share Posted August 9, 2013 I have bought my new PC about a year ago with 16 gigs of ram according to its description (BIOS, Windows az CPU-Z showed the same). Recently I opened the case for the first time and found out that there are four Corsair Vengeance 8GB (2x4GB) RAM modules installed in the motherboard which makes 32 gigs in total. Checked the detais of each slot in CPU-Z and it showes that there are four 4 gigs modules installed. Sorry, your math is off! :) CPUz is correct! That is only 16gigs total. (CMZ8GX3M2A1600C9) is a KIT part number not an individual stick number which are totally different.. 2x4gig=8gig x2 is 16. I'm not sure who built your computer, but they should not have used two 8 gig kits. Corsair does not suggest or support mixing kits EVEN IF THEY ARE TWO OF THE SAM EXACT PART NUMBER. They should have used one matched 16gig (4x4gig) kit. If you are thinking you really need 32 gigs then it would be best to replace what you have now with a single matched 32gig kit. Link to comment Share on other sites More sharing options...
thenosbod Posted August 9, 2013 Share Posted August 9, 2013 what operating system are you running? Windows 7 Home Premium 64 bit is limited to 16gb http://social.technet.microsoft.com/Forums/windows/en-US/5a518386-27a8-46fa-a85a-678b7c25358e/physical-memory-limits-windows-7 Link to comment Share on other sites More sharing options...
gema.b Posted August 9, 2013 Author Share Posted August 9, 2013 Sorry, your math is off! :) CPUz is correct! That is only 16gigs total. (CMZ8GX3M2A1600C9) is a KIT part number not an individual stick number which are totally different.. 2x4gig=8gig x2 is 16. I'm not sure who built your computer, but they should not have used two 8 gig kits. Corsair does not suggest or support mixing kits EVEN IF THEY ARE TWO OF THE SAM EXACT PART NUMBER. They should have used one matched 16gig (4x4gig) matched kit. If you are thinking you really need 32 gigs then it would be best to replace what you have now with a single matched 32gig kit. Thank you for your explanation, I thought that the number was the part number of a single double sided module and not a pair of modules. Now this is correct. Link to comment Share on other sites More sharing options...
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