Some of what I tried is already noted over here, but I'm still coming up empty...
Short version is that, with 16GB over 4 sticks in a Gigabyte AMD mobo, how much RAM I "actually" have is varying wildly depending on what software you ask, and it sure as snot doesn't FEEL Like 16GB when I'm lagging while using Steam 🙁 There's no configuration of the sticks that gives me more than 8GB, and I don't know why the memory is reporting as single channel now when it was always dual before. In late December/early January of this year, ALL FOUR sticks checked out as fine in MemTest86+, and since there's zero difference in effect with any combo of sticks-to-slots, I'm not inclined to think that the problem is my RAM itself. Windows reports 12GB, but "7.98GB usable," and Gigabyte's own tools are schizophrenic on the matter.
Specs are at the link in exhaustive detail, but mobo is a GIGABYTE GA-990FXA-UD3 with a 6-core AMD FX-6100, and the RAM is 4 sticks of 4GB G.SKILL Sniper Series 8GB 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) (That's all from NewEgg, if I accidentally omitted important information, I apologize.)
If the mobo is, in fact, dying, recommendations on a replacement? If I CAN hold out until the AM4 boards come out, I would rather, (while I intend to use my current CPU, I like options for the future,) but if I can't, I can't... If there's any chance of whatever's wrong here frying my other hardware or otherwise causing harm, I would rather use another AM3+ board than risk that
Any help/guidance I can get is APPRECIATED. I hate not trusting my gaming machine during Steam's Summer Sale
Short version is that, with 16GB over 4 sticks in a Gigabyte AMD mobo, how much RAM I "actually" have is varying wildly depending on what software you ask, and it sure as snot doesn't FEEL Like 16GB when I'm lagging while using Steam 🙁 There's no configuration of the sticks that gives me more than 8GB, and I don't know why the memory is reporting as single channel now when it was always dual before. In late December/early January of this year, ALL FOUR sticks checked out as fine in MemTest86+, and since there's zero difference in effect with any combo of sticks-to-slots, I'm not inclined to think that the problem is my RAM itself. Windows reports 12GB, but "7.98GB usable," and Gigabyte's own tools are schizophrenic on the matter.
Specs are at the link in exhaustive detail, but mobo is a GIGABYTE GA-990FXA-UD3 with a 6-core AMD FX-6100, and the RAM is 4 sticks of 4GB G.SKILL Sniper Series 8GB 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) (That's all from NewEgg, if I accidentally omitted important information, I apologize.)
If the mobo is, in fact, dying, recommendations on a replacement? If I CAN hold out until the AM4 boards come out, I would rather, (while I intend to use my current CPU, I like options for the future,) but if I can't, I can't... If there's any chance of whatever's wrong here frying my other hardware or otherwise causing harm, I would rather use another AM3+ board than risk that

Any help/guidance I can get is APPRECIATED. I hate not trusting my gaming machine during Steam's Summer Sale
