Nonlinear relation between vcore and stability?

[d_pap]

So, I used to think that more voltage meant more stability at the cost of higher temps.

Now, I am not so sure. I am trying to OC a sabertooth x99 with a 5930k. I can get it to pass a 1 hour stability at 4.3 with vcore of 1.26 with max temps around 76-80c (I think I have a crappy chip)

But, if I increase the vcore higher, from 1.27 all the way to 1.32 temps stay mostly the same but I get bsods on realbench after 15mins or so...

Ram is at 2133. I was trying to bring it up to 2400 which is why I was playing with the voltage increases...


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[d_pap]

Oh well, it just bsod at 1.26 after 82 mins at realbench...


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[Arne_Saknussemm]

When you were trying to bring up your RAM I presume you were raising VDIMM too? Kind of makes it sound like you were raising vcore for ram OC

What were the codes for the BSODs?

🙂

[d_pap]

No, I left vdimm at stock. Now, I have ram back at 2133 and just trying to get the cpu stable at 4.3. I am back at 1.26vcore but now raised vcinn to 1.93...

When I was trying to get the mem speed up, I would increase vcore, sa and vccio with the latter set to 0.05v lower than sa


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[d_pap]

The memory xmp defaults are 1.2v at 2800. I was running it at 2400 so did not think I needed to raise vdimm


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[d_pap]

Bsod code was 0x4A


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[Arne_Saknussemm]

I would always try a touch more VDIMM first before playing with SA or the other voltages...

too much SA volts can be as bad as too little so you have to find the sweet spot for this...not just a question of raising

Try 1.3v vdimm maybe....it's the IMC that determines how well memory is handled and this is subject to the vagaries of the silicon lottery...

If BSOD is clock watchdog then Vcore VCCIN needs looking at... (0x101 on older windows)

If WHEA or IRQ or machine check etc then maybe RAM related (stuff like 0x124 or 0x1A etc on older windows)

[d_pap]

Thanks! What is annoying is these errors happen at ram speeds of 2133, but gettig the irq error...

I think I will try the 125 strap to get at 4250...these were my previous settings with 0701 before flashing the bios to the new version


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[Raja]

Try tuning CPU Input Voltage, also.

[d_pap]

Yes, so far it has passed the realbench 1 hr mark. Going for 4 now

Settings are: 4250 using 125 strap, mem is at 2333

vcore offset mode 0.2 - 1.22 total
Cpu input voltage is at 1.93, sa offset at 0.19 and vccio at stock


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