Hello all, new member to Tom's Hardware.
I have an FX 8370 on a Asrock 990 Extreme3 board - very happy with it. I understand my memory controller is limited to 1866MHz. I have been running 16GB (2x8GB) Corsair Vengeance Pro 2400MHz on the mistaken believe that my controller would limit to 1866MHz. As ram is pretty much the same price I went for the faster ram on the principle of saturation.
Anyways, I have since bought another 16GB of the same ram - primarily because I couldn't bare to see two slots empty :/ Still set to 2400MHz, I turned the PC on but after booting to windows it threw a big wobbly. Turns out occupying four slots puts more stress on the controller and the FX processor is rated at 1866MHz with two sticks and only 1600MHz with four sticks of ram. I set the ram to speed to 1866MHz and it was fine, albeit I was only able to achieve CAS 10/10/10/27 instead of the Corsair rated CAS 9/10/9/27 at 1866MHz. I also had to manually turn down the voltage to 1.55v as opposed to the native 1.65v.
So, it appears that I was actually achieving a genuine 2400MHz with 16GB ram. I assume this is due to a quality board and a slightly more modern FX processor but still pretty good. My question is therefore, 16GB @ 2400MHz or 32GB @ 1866MHz? I'd imagine the real world difference is minimal either way tbf.
Also, except for the four basic CAS numbers, there are a load of other memory related numbers that I do not understand. Does anyone have any guidance here? At the moment my system isn't OC'd but this is an option and would give the controller a little more juice.
Thoughts welcome.
I have an FX 8370 on a Asrock 990 Extreme3 board - very happy with it. I understand my memory controller is limited to 1866MHz. I have been running 16GB (2x8GB) Corsair Vengeance Pro 2400MHz on the mistaken believe that my controller would limit to 1866MHz. As ram is pretty much the same price I went for the faster ram on the principle of saturation.
Anyways, I have since bought another 16GB of the same ram - primarily because I couldn't bare to see two slots empty :/ Still set to 2400MHz, I turned the PC on but after booting to windows it threw a big wobbly. Turns out occupying four slots puts more stress on the controller and the FX processor is rated at 1866MHz with two sticks and only 1600MHz with four sticks of ram. I set the ram to speed to 1866MHz and it was fine, albeit I was only able to achieve CAS 10/10/10/27 instead of the Corsair rated CAS 9/10/9/27 at 1866MHz. I also had to manually turn down the voltage to 1.55v as opposed to the native 1.65v.
So, it appears that I was actually achieving a genuine 2400MHz with 16GB ram. I assume this is due to a quality board and a slightly more modern FX processor but still pretty good. My question is therefore, 16GB @ 2400MHz or 32GB @ 1866MHz? I'd imagine the real world difference is minimal either way tbf.
Also, except for the four basic CAS numbers, there are a load of other memory related numbers that I do not understand. Does anyone have any guidance here? At the moment my system isn't OC'd but this is an option and would give the controller a little more juice.
Thoughts welcome.
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