Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 207 - Overclock.net - An Overclocking Community
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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion

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post #2061 of 2062 (permalink) Old 04-29-2017, 05:40 AM
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Sorry to bump this old thread but I have decided to overclock my RAM.

When it comes to RAM from what I've read there are stability tests like Memtest and HyperPI which I can pass, but when I test the same timings and overclock in Prime95 for stress testing it will fail within the hour and BSOD.

This is why I wanted to find out what is the cause even when I am giving volts up to Intel's limit :
1.65V DRAM,
(VCCSA 1.1) which shows in HWInfo as VTT 1.184-1.192 (My motherboard has no ability to change VTT)
1.8 PLL as , and applying the lowest of overclock (1800mhz) using the stock timings 11-11-11-28-1. I even changed the command rate to 2T and it failed within Prime95 but still passed one test in Memtest.

I ensured that my CPU overclock was stable and reading on Overclockers UK 8Pack (who is some kind of Overclocking champ with HWbot records) has mentioned an hour stress test is sufficient and then to just play your game. This is how I have approached my CPU overclocks.

This is what I enter into Prime95 to test


My system specs are:
3770k 4.7 ghz
Asus Sabertooth z77 with most recent bios
16gb samsung green ddr3
H100i cooler

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post #2062 of 2062 (permalink) Old 05-02-2017, 01:51 PM
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Quote:
Originally Posted by majnu View Post

Sorry to bump this old thread but I have decided to overclock my RAM.

When it comes to RAM from what I've read there are stability tests like Memtest and HyperPI which I can pass, but when I test the same timings and overclock in Prime95 for stress testing it will fail within the hour and BSOD.

This is why I wanted to find out what is the cause even when I am giving volts up to Intel's limit :
1.65V DRAM,
(VCCSA 1.1) which shows in HWInfo as VTT 1.184-1.192 (My motherboard has no ability to change VTT)
1.8 PLL as , and applying the lowest of overclock (1800mhz) using the stock timings 11-11-11-28-1. I even changed the command rate to 2T and it failed within Prime95 but still passed one test in Memtest.

I ensured that my CPU overclock was stable and reading on Overclockers UK 8Pack (who is some kind of Overclocking champ with HWbot records) has mentioned an hour stress test is sufficient and then to just play your game. This is how I have approached my CPU overclocks.

This is what I enter into Prime95 to test


My system specs are:
3770k 4.7 ghz
Asus Sabertooth z77 with most recent bios
16gb samsung green ddr3
H100i cooler
1.35v ram at 1.65v? I used to run mine at 2400/2133 1.50.1.55v IIRC.

But note that the IMC will have a hard time keeping up with 4 sticks, search this thread. For memory testing, I use google stressapptest. One hour, at least.

For a general overclock, 24-hour p95 blend with 90% of the ram. That's what I did back when I had an ivy bridge cpu, and I got errors 16 hours into the test. I wouldn't ever trust a CPU overclock with 1 hour prime test. Perhaps 8Pack's definition of "stability" means the ability to benchmark and upload the results.

A general advice is to validate your overclocks individually. In other words, test if you can overclock your RAM with no CPU overclock. I would also try with just 2 sticks.

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