Issues with Corsair Vengeance @2400

[D3K]

Hi all,

I'm extremely new to OCing. I've had a dabble with the graphics and got it stable through Afterburner. Had a look at OCing the proc through Gigabytes App Center and then binned it in favour of Intel XTU.

Firstly I can't understand where/what to change in that app so I've put OCing the proc on the backburner for now. I just want to get my RAM running at it's rated speed (2400MHz) but having several issues. In the BIOS it defaults to 1600MHz. I raised this to 2400.

Doing a memory stress test at this speed in XTU sees my proc in the high 90's. I was really anxious to get that finished and was hoping the software would cut itself out automatically but it didn't. That's a lesson learned the hard way right there!

I then tried a benchmark and encountered a system reset. Benchmarks before setting the speed to 2400 ran OK.

I fired up GTAV to do some testing and everything was ok with regards temps. However, after exiting my keyboard typing speed was fubar and I have dropped the mem down to 2133 for the time being to sort it.

As I say this is my first foray into OCing so I appreciate if there are some major gaps in my knowledge with this. I had assumed that memory being advertised at 2400 would mean it would run fine?

Does anyone have any similar experience with this issue? Should I just run it at 2133 and be done with it?

 

[D3K]

After the first round of system resets I updated the BIOS to F5 for gigabyte.
I then read that having XMP on required too much power through the proc so I turned that off and manually adjusted to 2400.

I just tested another benchmark at 2133 and it reset on me again. I've dropped it right down to 1600 and it benches fine. I was wrong before, the BIOS expects it to default to 1333...

Is it worth a memtest? I was having some page faults a while back if the machine was left on in sleep ad infinitum. I overcame that by shutting the PC down when not using it.

I do wonder if my Noctua cooler is pressing against the stick in a bad way.

 

[D3K]

I've ran memtest for a couple of hours, no issues.
I've reset my BIOS then only enabled XMP. The mem gets read correctly at 1200MHz in CPU-ID.

Intel XTU still hard resets my system during a benchmark.


Not sure what to do at this point

 

[D3K]

The CPU temps when stress testing memory are really high. During the benchmark they are not as high, but they appear to bounce up and down quite wildly, with the min/max rising each cycle.

When it resets, the last temp I see is about 75ish. Perhaps the internal temp is much higher and the software didn't have time to display it.

I'm using a Noctua NH-L12.

 

[D3K]

For 16GB probably going to have to increase the IMC/VTT voltages a touch - 1.15 max should do it - probably won't need that.

Current Intel CPUs tend to give the best balanced performance with 2133/tight timings so that isn't necessarily a terrible idea but you'd probably gain 1-2fps for gaming use at 2400.

The voltage side of things is beyond me and I was hoping to avoid swatting up for a while Give me mechanics, thermodynamics, fluid mechanics any day of the week - electrical theory refuses to stick in my brain.

I've thought about reseating the cooler but it performs exactly how I would expect it to under stock ram speeds. It's 30deg on idle at the minute and doesn't go too far above 70 under load. Throw the 2400 setting in there and it goes wild.

Coincidentally, I was on site today doing a CAD upgrade for some clients, and his new Dell box sounded like it was about to take off. Had a look inside and the cooler was sitting on top of the gfx card. His cpu had been running on air for about 8 hours :O

 

[D3K]

I've had a poke around and can't see anywhere to control VTT/IMC. The only voltage related to memory I can see is the voltage to the dimms themselves.

 

[D3K]

I've swatted up some and found that the RAM getting set to 1.65V when enabling XMP is a bad thing.

I'm gonna try 2133 over the weekend and underclocking the voltage - from what I've read so far 2400 is not worth the overheating.

 

[D3K]

I think I've cracked it - dropped the core multi down from 44x to 43x and the benchmark runs the RAM at 2400MHz, 1.65v. Max temp spike is 97 degrees so not ideal but gives me a base to work with.