(1067MHz operation may not be needed....see below) -Mike D
Howdy,
I could not obtain another 4 GB of the Corsair CM2X2048-8500C5 memory modules that I had purchased back in 2008. For reference, they are 5-5-5-15 tRC 22 memory modules. Finding that G.Skill F2-8500CL5D-4GBPK had the same 5-5-5-15 rating with a decent price...I decided to use those. Prior to getting the G.Skill I was 1067 MHz with the Corsair and no memory issues at 4 GB.
So I plug in the new memory modules, but since I didn't have any apps needing 8 GB immediately, I tried MemTest 4.20. I did have errors with the new modules....so I pulled up CPU-Z to see what might be going on. The Corsair modules have a tRC of 22 and the G.Skill modules have a tRC of 48.....hmmmmmm....Why is the tRC for these modules so HIGH? I mean it's more than double the tRC of the modules from 4 years ago (I'm assuming a higher number is not a better number when it comes to memory modules). Anyway, I try to adjust the tRC manually in my BIOS (ver 2001 for ASUS M3A78-T....newest), however, the BIOS only lets me go up to tRC of 41.
So I've tried a few recommendations I saw for the example ASUS M3A78T-E as the sticky....I can't get to 1067MHz with the G.Skill modules (well, I haven't tried unplugging the Corsair) and I'm running at 800MHz right now with 5-5-5-18 tRC24 2T for stability's sake.
I've tried cranking the memory up to 2.0v and 2.1v, HT and NB to 1.4v....using AUTO and the manual settings listed for the M3A78T-E sticky. No dice.
Am I stuck in 800 MHz land or am I missing something here to get to 1067MHz? I know this board is a AM2+, but I have a Phenom 2 975 processor (AM3) in the socket and I think it might be able to address all the 1067 MHz ram (aren't they set up for DDR3 1333?). Or is my mobo the limiting factor here? Thanks in advance for any advice.
Mike Doerner
Asus M3A78-T
AMD Phenom II 975 BE 3.6 GHz
4 GB Corsair CM2X2048-8500C5
4 GB G.Skill F2-8500CL5D-4GBPK
ATI FirePro V5800
Some ginormous CPU cooler from 4 years back....
An ATX case from 2003
850W power supply (SilverStone?)
Howdy,
I could not obtain another 4 GB of the Corsair CM2X2048-8500C5 memory modules that I had purchased back in 2008. For reference, they are 5-5-5-15 tRC 22 memory modules. Finding that G.Skill F2-8500CL5D-4GBPK had the same 5-5-5-15 rating with a decent price...I decided to use those. Prior to getting the G.Skill I was 1067 MHz with the Corsair and no memory issues at 4 GB.
So I plug in the new memory modules, but since I didn't have any apps needing 8 GB immediately, I tried MemTest 4.20. I did have errors with the new modules....so I pulled up CPU-Z to see what might be going on. The Corsair modules have a tRC of 22 and the G.Skill modules have a tRC of 48.....hmmmmmm....Why is the tRC for these modules so HIGH? I mean it's more than double the tRC of the modules from 4 years ago (I'm assuming a higher number is not a better number when it comes to memory modules). Anyway, I try to adjust the tRC manually in my BIOS (ver 2001 for ASUS M3A78-T....newest), however, the BIOS only lets me go up to tRC of 41.
So I've tried a few recommendations I saw for the example ASUS M3A78T-E as the sticky....I can't get to 1067MHz with the G.Skill modules (well, I haven't tried unplugging the Corsair) and I'm running at 800MHz right now with 5-5-5-18 tRC24 2T for stability's sake.
I've tried cranking the memory up to 2.0v and 2.1v, HT and NB to 1.4v....using AUTO and the manual settings listed for the M3A78T-E sticky. No dice.
Am I stuck in 800 MHz land or am I missing something here to get to 1067MHz? I know this board is a AM2+, but I have a Phenom 2 975 processor (AM3) in the socket and I think it might be able to address all the 1067 MHz ram (aren't they set up for DDR3 1333?). Or is my mobo the limiting factor here? Thanks in advance for any advice.
Mike Doerner
Asus M3A78-T
AMD Phenom II 975 BE 3.6 GHz
4 GB Corsair CM2X2048-8500C5
4 GB G.Skill F2-8500CL5D-4GBPK
ATI FirePro V5800
Some ginormous CPU cooler from 4 years back....
An ATX case from 2003
850W power supply (SilverStone?)
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