F5F Stay Refreshed Power Users Overclocking Good or bad depends on the context, but generally it's a positive sign.

Good or bad depends on the context, but generally it's a positive sign.

Good or bad depends on the context, but generally it's a positive sign.

A
ash_n_brad
Posting Freak
778
10-25-2017, 03:58 AM
#1
Hello everyone,
I recently upgraded from an 8600k to a 8700k. My OC is stable at 4.9ghz (no avx offset) at 1.30v, with uncore at 4600mhz. Is this a positive or negative result? I experimented with 5.0 (avx -1 offset) at 1.38... it worked well during the prime95 1344k stress test for an hour, but real bench crashes occurred when temperatures exceeded 100c.
I'm using a Noctua NH-U14s cooler and 3200 CL16 RAM OC'd to 3466. Asus Z370-A Prime. VRM temperatures were in the 70s even at 1.38v.
Thanks in advance.
A
ash_n_brad
10-25-2017, 03:58 AM #1

Hello everyone,
I recently upgraded from an 8600k to a 8700k. My OC is stable at 4.9ghz (no avx offset) at 1.30v, with uncore at 4600mhz. Is this a positive or negative result? I experimented with 5.0 (avx -1 offset) at 1.38... it worked well during the prime95 1344k stress test for an hour, but real bench crashes occurred when temperatures exceeded 100c.
I'm using a Noctua NH-U14s cooler and 3200 CL16 RAM OC'd to 3466. Asus Z370-A Prime. VRM temperatures were in the 70s even at 1.38v.
Thanks in advance.

W
WreckerSG
Member
201
11-10-2017, 11:57 PM
#2
pretty good overall, 1.30v looks safe and worth it compared to pushing for 5.0 since the gains are fading a bit. Maybe if you manage 1.30v at 4.9, you could hit 5.0 with 1.35v if you add more input voltage, reduce or raise the ring ratio, and boost ring voltage too—this can also improve stability. Also, system agent voltage helps stabilize the memory controller, preventing crashes that might blame the Vcore. A 0.5v increase on Vcore usually works well for a 100mhz bump.
W
WreckerSG
11-10-2017, 11:57 PM #2

pretty good overall, 1.30v looks safe and worth it compared to pushing for 5.0 since the gains are fading a bit. Maybe if you manage 1.30v at 4.9, you could hit 5.0 with 1.35v if you add more input voltage, reduce or raise the ring ratio, and boost ring voltage too—this can also improve stability. Also, system agent voltage helps stabilize the memory controller, preventing crashes that might blame the Vcore. A 0.5v increase on Vcore usually works well for a 100mhz bump.

N
Nienke_2002
Senior Member
621
11-28-2017, 04:34 AM
#3
What are your system specifications?
Have you used the LLC before?
I understand not all CPUs are the same, but I’m running a 5.1Ghz processor at 1.37v, with 6 out of 7 cores loaded or in line load calibration, a CPU cache ratio of 46, and no AVX offset.
It might sound intimidating, but have you considered downsizing your CPU?
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Nienke_2002
11-28-2017, 04:34 AM #3

What are your system specifications?
Have you used the LLC before?
I understand not all CPUs are the same, but I’m running a 5.1Ghz processor at 1.37v, with 6 out of 7 cores loaded or in line load calibration, a CPU cache ratio of 46, and no AVX offset.
It might sound intimidating, but have you considered downsizing your CPU?

_
_Lolikc_
Member
184
11-28-2017, 11:18 AM
#4
Asus Z370-A prime
Gskill trident z rgb 3200 cl16 2 x 8gb
Nhu14s
I’ve adjusted it to llc 6, which works best for me.
I haven’t thought about removing the case.
_
_Lolikc_
11-28-2017, 11:18 AM #4

Asus Z370-A prime
Gskill trident z rgb 3200 cl16 2 x 8gb
Nhu14s
I’ve adjusted it to llc 6, which works best for me.
I haven’t thought about removing the case.

O
Olliesimpo
Member
65
11-28-2017, 08:12 PM
#5
It looks like you might achieve a higher frequency.
8700K
4.80GHz
4.60GHz
1.375V
100%

8700K
4.90GHz
4.70GHz
1.387V
Top 99%

8700K
5.00GHz
4.80GHz
1.400V
Top 83%

8700K
5.10GHz
4.90GHz
1.412V
Top 49%

8700K
5.20GHz
5.00GHz
1.425V
Top 17%

8700K
5.30GHz
5.10GHz
1.437V
Top 4%
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Olliesimpo
11-28-2017, 08:12 PM #5

It looks like you might achieve a higher frequency.
8700K
4.80GHz
4.60GHz
1.375V
100%

8700K
4.90GHz
4.70GHz
1.387V
Top 99%

8700K
5.00GHz
4.80GHz
1.400V
Top 83%

8700K
5.10GHz
4.90GHz
1.412V
Top 49%

8700K
5.20GHz
5.00GHz
1.425V
Top 17%

8700K
5.30GHz
5.10GHz
1.437V
Top 4%

P
phoenixtigger
Member
129
11-28-2017, 08:41 PM
#6
It's not your exact board, but it's an Asus one, so the BIOS could be very similar. I used this as a reference when trying to boost my 8700k. I also paired it with the Rockit 88 delid kit and its solid copper IHS. The first core reaches 78*c, while the others sit around the mid-70s, giving a top speed of about 5.1Ghz without any AVX adjustments.
P
phoenixtigger
11-28-2017, 08:41 PM #6

It's not your exact board, but it's an Asus one, so the BIOS could be very similar. I used this as a reference when trying to boost my 8700k. I also paired it with the Rockit 88 delid kit and its solid copper IHS. The first core reaches 78*c, while the others sit around the mid-70s, giving a top speed of about 5.1Ghz without any AVX adjustments.

S
subsky
Junior Member
44
11-29-2017, 09:25 PM
#7
Of course, the nearby store let me exchange it and grab another chip... it's stable at 1.3v 5ghz without any AVX offset, and even when testing different chips at identical voltages and loads, they perform just as well. The new one is 5-8°C cooler and running better.
S
subsky
11-29-2017, 09:25 PM #7

Of course, the nearby store let me exchange it and grab another chip... it's stable at 1.3v 5ghz without any AVX offset, and even when testing different chips at identical voltages and loads, they perform just as well. The new one is 5-8°C cooler and running better.