4770k / Giga Z87 OC Help

Hi Gary,
I'm no expert so to help you i'll just quote what 8 Pack told me when i asked the very same question earlier, (hope you don't mind 8 Pack)

(8 Pack)
Good starting point for around 4.5 is 1.25 Vcore.
So into bios. Set XMP on the first setting. This sets up your RAM.
Then set turbo ratio by all cores and key in 45 to give you 4.5ghz.
Set cache Ratio to 43 for the best possible perf stability option. Lower to 42 if needed for more stability.
Move down now to Vcore and set manual and key in 1.25v,
On Cache Volts set 1.25v also.
Depending on your RAM will depend on what SA, IOD and IOA are needed. Often auto is fine but with high speed RAM and low latency adjustment may be needed.
This should be enough to start you off.

For stability testing just use the machine!!!!
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I'm now stable @4.5. 1.232 vcore, 45 on both cache ratios, tell us how you get on, will be good to compare systems as they're similar.
I think 4.6-4.7 is very possible, but i'm over the moon with the performance as is so i'm leaving it alone until it's all under water with a better Gpu.
Best of luck.
 
Temperatures drop very quickly once the load is gone (after all, that's what the cooling is supposed to do, pull the heat away) and rise very quickly when there is load.

Please report maximum temperatures instead, e.g. through AIDA64 or CoreTemp.
 
Throw in a real Haswell test: AIDA64 stress test, Intel XTU stress test ... they know how to stress Haswell and push the temperatures. With those you can push up to around 85c. Intel XTU is also pretty helpful to dial in the settings to get to the desired clock, and test basic stability at the same time.

That said, you do have plenty of room to push higher. I'm reaching 70, 68, 69, 64 with 3D Mark 11 on air cooling, so you can probably easily reach 4.8 if not higher, assuming your chip will let you.
 
Dont forget if your not stable or stable ish, try upping your VIN voltage to within 0.5% -.0.10% of your vcore voltage.

Vin should be within 0.5% to 0.10% under your vcore voltage.

Example : Bios :1.226v = Windows + FIVR overvoltage :vcore 1.248v Under Load. * Haswell chipsets add a little extra under load on top of your bios settings its normal *
: VIN Voltage :1.944v :D * you can go as high as 1.25v on air * * Dont go over it *
All Speed Step Settings Enabled : 8x Multi, Core Ratio :45 / Uncore 43x

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Those are my settings.
dont be frightened about upping VIN as it does not add much more heat to your system and it will make 43x uncore stable + let you using a little lower vcore = less heat ;)
trade VIN for Vcore anyday of the week :D
 
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