PXD38G1866ELK on ASRock Extreme3 Gen3

[slicker]

Hello everyone,

I am having difficulties running Patriot Viper Xtreme 8GB 2X4GB DDR3 1866MHZ 9-11-9-27 1.65V XMP (PXD38G1866ELK) on my motherboard ASRock Z68 Extreme3 Gen3. The mainboard manual says it supports DDR3 memory speeds up to 2133MHz.

The problem is that when I set XMP settings in BIOS to Profile 1 the system will not start at all so I have to reset CMOS and that will reset DRAM speed to 1333MHz running at 9-9-9-24. I have set XMP manually and I managed to get it run on 1600MHz 9-11-9-27. Although every time I try to set it to 1866MHz the system will not start after reboot. Does anyone know if there is a way to make this work? Perhaps to disable some safety setting in BIOS that's preventing the memory to run at its suggested speed? Could it be that my CPU: Core i3 2120 can't handle 1866MHz DDR3 RAM? And I'm using Corsair 600CX PSU.

I was also thinking that I might want to try to leave it at 1600MHz and decrease latency instead as BIOS automatically sets it to 9-9-9-24 if I don't change it manually to 9-11-9-27. Do you think I can run into some issues with changing the latency on behalf of the clock speed? Thanks.

[Patriot_Ben]

Hello everyone,

I am having difficulties running Patriot Viper Xtreme 8GB 2X4GB DDR3 1866MHZ 9-11-9-27 1.65V XMP (PXD38G1866ELK) on my motherboard ASRock Z68 Extreme3 Gen3. The mainboard manual says it supports DDR3 memory speeds up to 2133MHz.

The problem is that when I set XMP settings in BIOS to Profile 1 the system will not start at all so I have to reset CMOS and that will reset DRAM speed to 1333MHz running at 9-9-9-24. I have set XMP manually and I managed to get it run on 1600MHz 9-11-9-27. Although every time I try to set it to 1866MHz the system will not start after reboot. Does anyone know if there is a way to make this work? Perhaps to disable some safety setting in BIOS that's preventing the memory to run at its suggested speed? Could it be that my CPU: Core i3 2120 can't handle 1866MHz DDR3 RAM? And I'm using Corsair 600CX PSU.

I was also thinking that I might want to try to leave it at 1600MHz and decrease latency instead as BIOS automatically sets it to 9-9-9-24 if I don't change it manually to 9-11-9-27. Do you think I can run into some issues with changing the latency on behalf of the clock speed? Thanks.

No you shouldn't run into any issues decreasing the latency at a lower frequency.

...What Bios version are you on? Can you try flashing the board to the latest bios? Let me know if this helps.

[slicker]

Thank you for your reply. I have tried to flash BIOS to the latest version (1.30) but it didn't help. I think I'll just leave it at running at 1600MHz 9-9-9-24. I tested it for a few days and it seems to be stable.

[Patriot_Ben]

Hey slicker,

I totally missed the last part of your initial reply.


Could it be that my CPU: Core i3 2120 can't handle 1866MHz DDR3 RAM? And I'm using Corsair 600CX PSU.


Sorry about that... but yes CPU is definitely a big factor of how high the memory can overclock. Our PXD lines are qualified on I5's and I7's. This can definitely be the reason why you aren't able to achieve 1866MHz. Let me know if you have any further questions.