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Haswell Overclocking Guide [With Statistics] - Page 672

post #6711 of 19539
Quote:
Originally Posted by NightHawk06 View Post

Hey guys I have a problem I overclocked my haswell i5 4670k to 4.8ghz other day now i'm at 4.7ghz!! Anyway I was doing some overclocking on my Memory and came
across this NB Freq is at 3.8ghz why so?? I have the CPU Ratio at 4.7ghz 1.34v complete stable but shows here 3800mhz NB Freq that normal? I change it to 4.7 but wouldnt boot up so its at auto and Cpu ratio at 47

Have a MSI Z87 G45 motherboard

NB Frequency is the Cache frequency. It is related to the Core frequency, but they are not the same thing.
Wizzie has explained a bit about it in the guide, but the basics are as follows:

- Cache frequency has a default clock of 3.7ghz for 4670k chips
- In an ideal world, you would set the Cache frequency to the same frequency as your Core frequency (so, 4.7ghz in your case)
- To do this, you would more-than-likely need to increase Vring voltage (it is a voltage different to that of Vcore voltage)
- The max recommended Vring voltage is ~1.2v. It's default voltage hovers around 1.05v for most chips.
- Next-to-no chips are actually capable of holding a cache frequency identical to a high core frequency. (mine doesn't like going above 4.3ghz with recommended max voltages)
- The cache frequency has a absolute minimal impact on performance. You're loosing next-to-nothing by leaving it at default.
- The quickest way to test for cache frequency overclock stability is to run the Aida64 cache stress test (tick the cache stress test box and leave the rest blank). If you survive 4 hours, you'll be golden.

hope this helps
post #6712 of 19539
Quote:
Originally Posted by fleetfeather View Post

NB Frequency is the Cache frequency. It is related to the Core frequency, but they are not the same thing.
Wizzie has explained a bit about it in the guide, but the basics are as follows:

- Cache frequency has a default clock of 3.7ghz for 4670k chips
- In an ideal world, you would set the Cache frequency to the same frequency as your Core frequency (so, 4.7ghz in your case)
- To do this, you would more-than-likely need to increase Vring voltage (it is a voltage different to that of Vcore voltage)
- The max recommended Vring voltage is ~1.2v. It's default voltage hovers around 1.05v for most chips.
- Next-to-no chips are actually capable of holding a cache frequency identical to a high core frequency. (mine doesn't like going above 4.3ghz with recommended max voltages)
- The cache frequency has a absolute minimal impact on performance. You're loosing next-to-nothing by leaving it at default.
- The quickest way to test for cache frequency overclock stability is to run the Aida64 cache stress test (tick the cache stress test box and leave the rest blank). If you survive 4 hours, you'll be golden.

hope this helps

oh ya so I need to change it to 47 same as cpu ratio? and raise vcore voltage? I'm new to overclocking this cpu and never heard of vring voltage
post #6713 of 19539
Quote:
Originally Posted by NightHawk06 View Post

oh ya so I need to change it to 47 same as cpu ratio? and raise vcore voltage? I'm new to overclocking this cpu and never heard of vring voltage

Try this:

- Keep Vcore voltage at what you have it now (1.34v)
- Keep Core frequency the same (4.7ghz)
- Raise Vring voltage (also called Cache Ratio voltage, or Uncore voltage) to 1.18v
- Raise both the "minimum cache" and "maximum cache" frequencies to 4.0ghz

see if you're stable with that first.

(if someone reading this is more familiar with MSI mobo's maybe they can provide some input into what the values are called on their UEFI?)
post #6714 of 19539
Quote:
Originally Posted by fleetfeather View Post

Try this:

- Keep Vcore voltage at what you have it now (1.34v)
- Keep Core frequency the same (4.7ghz)
- Raise Vring voltage (also called Cache Ratio voltage, or Uncore voltage) to 1.18v
- Raise both the "minimum cache" and "maximum cache" frequencies to 4.0ghz

see if you're stable with that first.

(if someone reading this is more familiar with MSI mobo's maybe they can provide some input into what the values are called on their UEFI?)

here is my bios what do I change can you arrow draw what to change?? This is very confusing to me lol





post #6715 of 19539
change "CPU Ring Voltage" from Auto to 1.18v
change "Adjust Ring Ratio" from Auto to 40 (4000mhz)

if it doesn't boot, change "Adjust Ring Ratio" to 39 (3900mhz)

thumb.gif
post #6716 of 19539
Quote:
Originally Posted by fleetfeather View Post

change "CPU Ring Voltage" from Auto to 1.18v
change "Adjust Ring Ratio" from Auto to 40 (4000mhz)

if it doesn't boot, change "Adjust Ring Ratio" to 39 (3900mhz)

thumb.gif

sweet will give it a try any of those other settings i need to disable power saving for cpu??
post #6717 of 19539
Quote:
Originally Posted by NightHawk06 View Post

sweet will give it a try any of those other settings i need to disable power saving for cpu??

for stress testing, i left all my power saving features on Auto. I can't see any settings in those photos which concern me too much personally. I think someone will probably suggest that you set a manual VCCIN voltage to 1.85v though
post #6718 of 19539
Quote:
Originally Posted by fleetfeather View Post

for stress testing, i left all my power saving features on Auto. I can't see any settings in those photos which concern me too much personally. I think someone will probably suggest that you set a manual VCCIN voltage to 1.85v though

oh ya I have no idea what that is have to change that also to 1.85v? It booted up cpu ring voltage 1.180v 4ghz cpu

post #6719 of 19539
Quote:
Originally Posted by fleetfeather View Post

for stress testing, i left all my power saving features on Auto. I can't see any settings in those photos which concern me too much personally. I think someone will probably suggest that you set a manual VCCIN voltage to 1.85v though

I just went back into bios and set at 4.1ghz and it booted up biggrin.gif can I go higher?

post #6720 of 19539
Quote:
Originally Posted by NightHawk06 View Post

oh ya I have no idea what that is have to change that also to 1.85v? It booted up cpu ring voltage 1.180v 4ghz cpu


you don't "have" to set a manual VCCIN, but most people prefer to. Run aida64 cache stress test for a couple of hours and see if 4.0 @ 1.18v is stable. If it is, you can keep moving "Adjust Ring Ratio" higher (4.1 -> 4.2 -> 4.3 etc.). You can also increase "CPU Ring Voltage" to 1.20v, but i wouldn't go any higher than that personally.
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