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post #21 of 27 (permalink) Old 05-16-2020, 10:09 PM
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Yup. These Kits are some of the best bang for the buck in terms of High Overclockability, while still being affordable. I own 2 of the 2x8GB 3200Mhz CL14 G.Skill Flare-X Version of these kits. They are literally the exact same B-Die DIMM's, Binned with the exact same timings, the only difference is the branding. Mine are "F4-3200C14-8GFX" instead of the "8GVR" Suffix.

In my experience, even when clocking these DIMM's up to 3800Mhz CL16, you can still get the tRFC down to the 288 to 336 Range, which makes these really scream.

Right now I am running both of my Kits (So 4x8GB; 32GB Total) on a Crosshair VII Hero, which I believe is keeping me from Disabling Geardown Mode. I am hopeful that once my C8H Arrives, I will be able to disable Gear Down Mode, and then try for CL15. My Only issue now is that I have to run them at 1.48v to stabilize my OC on all 4 DIMM's, and this will run completely stable with no errors, up until one of my DIMM's Reaches somewhere between 48c to 52c. Once I hit that threshold under Karhu's Ram Test or MemTest, then Errors Start Creeping in. Right now I had Side Mounted Fans that keep that from happening, but when My new MoBo arrives next week I will finally be installing my Ram Waterblock, which will allow me to keep them below 40c at all times without the Side Mounted Fan having to ramp up to 1600 RPM. So Excited for that!

Anyways, these are absolutely awesome kits! I am glad more people are getting good use out of them, the Overclockability of these B-Die chips are truly amazing, and I am hoping finally jumping on to x570 will give me more capability. I know the Mobo Matters, because I also have a few Crosshair VI Hero's, and those use a different Memory Topology, and with the same exact 3950x and the same exact same 2 Kits of FlareX, I can Only Push to 3600Mhz CL16, so at the very least the Topology matters, but I am hopeful that the higher quality traces in the C8H vs the C7H will also help me push just a little harder.

Anyways, all you guys have awesome Mem OC's! Keep up the awesome work!

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post #22 of 27 (permalink) Old 05-16-2020, 11:35 PM
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You should have no issue running [email protected] and that is what I would run.
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post #23 of 27 (permalink) Old 05-17-2020, 04:11 AM
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How hot is too hot for this memory? I'm running TestMem5 right now and at this point one of my center DIMMs is at 52 degrees.

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post #24 of 27 (permalink) Old 05-17-2020, 04:50 AM
 
 
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Quote: Originally Posted by ribosome View Post
How hot is too hot for this memory? I'm running TestMem5 right now and at this point one of my center DIMMs is at 52 degrees.
52'C is fine, but stability issues can occur.

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post #25 of 27 (permalink) Old 05-17-2020, 09:49 AM
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Quote: Originally Posted by ribosome View Post
How hot is too hot for this memory? I'm running TestMem5 right now and at this point one of my center DIMMs is at 52 degrees.
Quote: Originally Posted by MrTOOSHORT View Post
52'C is fine, but stability issues can occur.
Yup. @MrTOOSHORT is exactly right. These DIMM's as well as most DDR4 can actually take heat well an excessive of 70c before actually being damaged. It would have to be One Hell of a hot box case, along with shoving a lot of Voltage through these to ever reach a temperature that is actually dangerous for the DIMMs. The real issue as MrTooShort alluded to is stability loss. Every DIMM is different. I tend to lose stability when pushing my DIMMs OC and then reaching around 50c +/- 2c. Depending on your OC, you could have complete stability at the same Temp, or you could be producing errors left and right. So really its just best to test your Kit, and see if you hit any errors during at least an hour or 2 Stability test, most people are good with testing to 1000% to 2000% with Karhu RamTest or Memtest. If you can reach 2000% of a constant test and don't have 1 error, than it doesn't really matter how hot your DIMM's get (Assuming you aren't exceeding that 70c Mark), you are good. Just remember, even 1 Error is no good. Hope this helps.

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post #26 of 27 (permalink) Old 05-17-2020, 04:00 PM
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Quote: Originally Posted by oreonutz View Post
Yup. @MrTOOSHORT is exactly right. These DIMM's as well as most DDR4 can actually take heat well an excessive of 70c before actually being damaged. It would have to be One Hell of a hot box case, along with shoving a lot of Voltage through these to ever reach a temperature that is actually dangerous for the DIMMs. The real issue as MrTooShort alluded to is stability loss. Every DIMM is different. I tend to lose stability when pushing my DIMMs OC and then reaching around 50c +/- 2c. Depending on your OC, you could have complete stability at the same Temp, or you could be producing errors left and right. So really its just best to test your Kit, and see if you hit any errors during at least an hour or 2 Stability test, most people are good with testing to 1000% to 2000% with Karhu RamTest or Memtest. If you can reach 2000% of a constant test and don't have 1 error, than it doesn't really matter how hot your DIMM's get (Assuming you aren't exceeding that 70c Mark), you are good. Just remember, even 1 Error is no good. Hope this helps.
Yeah thanks this does help. I finished 20 cycles in TM5 with no errors at 1.45 V with the new lower tRFC but it was running hot pretty much the whole time.


I figure it's fine, since under normal circumstances it's unlikely that it'll get that hot.
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post #27 of 27 (permalink) Old 05-17-2020, 04:48 PM
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Quote: Originally Posted by ribosome View Post
Yeah thanks this does help. I finished 20 cycles in TM5 with no errors at 1.45 V with the new lower tRFC but it was running hot pretty much the whole time.


I figure it's fine, since under normal circumstances it's unlikely that it'll get that hot.
Sweet! Yup you are most likely fine! Nice OC, Happy Gaming!

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