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your Broadwell-E average clock

abui1806

abui1806

abui1806

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Hi,
I am interested in buying a Broadwell-E for an ITX project atm and was just wondering about its overclocking ability.
What sort of voltage does your cpu require to pass cinebench R15 at 4.3Ghz and 4.5Ghz?
Including 6800K, 6900K, 6950X.
Thanks a lot!
 
A visit at the 3D Mark Spy thread, will be helpful :)

Only Pandemonium has 6800K @ 4.2, 3 x 6950X @ 4.4, Gregster has 6850K @ 4.5 and two 6900K at 4.4 also.

From looking around on the net 6800K struggles to overclock, 6850K is better at 4.4 , but very ultra rare to get more than 4.4Ghz in general for all of the family.

Reason is too much power hungry to overclock and cannot transfer heat fast at the node size even when watercooled.

I actively looking to change my 4820K atm, but there isn't anything.
6700K is almost dead end with Kaby lake looming, which is 4 core CPU also.
6800K doesn't overclock well while is 1 generation behind the 6700K.
Haswell-E seems they do have life in them.

However new socket for Skylake-X in Q2017 to replace the 2011-3, and new socket for Kaby, even if the Kaby is compatible with Z170 also. (minus some features).

And personally need something with a lot of cores for rendering :/
 
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Thanks a lot for your informative comment Panos. I am definitely going to check the thread for more detail.
It seems like later batches of Haswell-E might got the upper hand in overclocking.
Well I'm not sure they are going to make any ITX board for Skylake-X so for now I'm just looking for a good clocker and hoping the performance leap won't be much :D
 
My 6850K can do 4.2Ghz at approx 1.22v. I only have the NH-U12S (dual fan config) on it which is not built for heavy overclocking above 140w. I'm sure the chip could go further if it was watercooled but trying 4.3Ghz requires too much voltage (hence heat) for the cooler to handle. I ran AI Suite and it came back with a result of 4.5 Ghz @ 1.47v - No way i'm running that 24/7 even if i had the cooling.
 
Currently they dont seem to clock as well as the latter batches of older 2011 cpu's, J batch being the ones of note. Which took a while now tbh. So this will probably happen too as the manufacturing process matures.
 
setter said:
Currently they dont seem to clock as well as the latter batches of older 2011 cpu's, J batch being the ones of note. Which took a while now tbh. So this will probably happen too as the manufacturing process matures.
Click to expand...

Yes however J batch on Haswell-E took them more than a year to get (the first came out 2014) there.
 
abui1806 said:
Thanks a lot for your informative comment Panos. I am definitely going to check the thread for more detail.
It seems like later batches of Haswell-E might got the upper hand in overclocking.
Well I'm not sure they are going to make any ITX board for Skylake-X so for now I'm just looking for a good clocker and hoping the performance leap won't be much :D
Click to expand...

After writing the above, made the decision and grabbed a second hand 4930K. Had in the OCUK basket a 5820K last night, but nah. Decided to buy a GTX1080 from OCUK with the holiday fund (contract renewed so no holidays), and keep the rest of the money that was going for the Titan X (Pascal) for a good gsync monitor.
 
Burr said:
My 6850K can do 4.2Ghz at approx 1.22v. I only have the NH-U12S (dual fan config) on it which is not built for heavy overclocking above 140w. I'm sure the chip could go further if it was watercooled but trying 4.3Ghz requires too much voltage (hence heat) for the cooler to handle. I ran AI Suite and it came back with a result of 4.5 Ghz @ 1.47v - No way i'm running that 24/7 even if i had the cooling.
Click to expand...
I will be using the EK Predator 240 hopefully it can tame the beast at least up to 1.35v :)

setter said:
Currently they dont seem to clock as well as the latter batches of older 2011 cpu's, J batch being the ones of note. Which took a while now tbh. So this will probably happen too as the manufacturing process matures.
Click to expand...
Yes, currently there is no L batch Broadwell-E, maybe L batch 6950X is the next big thing? :D
Panos said:
After writing the above, made the decision and grabbed a second hand 4930K. Had in the OCUK basket a 5820K last night, but nah. Decided to buy a GTX1080 from OCUK with the holiday fund (contract renewed so no holidays), and keep the rest of the money that was going for the Titan X (Pascal) for a good gsync monitor.
Click to expand...
I'm still waiting for AMD flagship since I already stuck with the MG279Q with Freesync :(
 
Panos said:
After writing the above, made the decision and grabbed a second hand 4930K. Had in the OCUK basket a 5820K last night, but nah. Decided to buy a GTX1080 from OCUK with the holiday fund (contract renewed so no holidays), and keep the rest of the money that was going for the Titan X (Pascal) for a good gsync monitor.
Click to expand...

Good stuff. I had the 4960X and would've stuck with it if the motherboard hadn't died. ran quite happily at 4.6 with 2400 ram.
 
My 6800k is 4.4 capable under water just about with a 240 rad and a lot of volts.

It's at stock atm tbh since the gpu is the limiting factor at 4k.

Don't do what I did and buy fast ram thinking the IMC should be almost up to skylake level. 3400 is possible for me but only at lower clock speed than stock. 3200 should be doable without affecting the OC.
 
Panos said:
Do you still have the cpu? :)
Click to expand...

Unfortunately not. I sold it and moved to skylake after not being able to find a good board for a decent price.

I had the RIVE BE and the bios got corrupted and unrecoverable for no reason. It was away for RMA for 5 weeks before just receiving a partial refund.
 
pandem0nium said:
My 6800k is 4.4 capable under water just about with a 240 rad and a lot of volts.

It's at stock atm tbh since the gpu is the limiting factor at 4k.

Don't do what I did and buy fast ram thinking the IMC should be almost up to skylake level. 3400 is possible for me but only at lower clock speed than stock. 3200 should be doable without affecting the OC.
Click to expand...

cheers for the info. I'm looking at the Avexir Raiden 2x8GB 2666Mhz with the intention to run it at 3000-3200Mhz so that wouldn't be a problem.
I have an 5820K which can do one hour of Asus realbench stress test at 4.5Ghz with 1.195v but so itchy to get Broadwell-E that's all. :D
BTW, is it worth to get the 5960x for £800 which can do cinbench R15 at 4.7Ghz with 1.192v?
 
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abui1806 said:
cheers for the info. I'm looking at the Avexir Raiden 2x8GB 2666Mhz with the intention to run it at 3000-3200Mhz so that wouldn't be a problem.
I have an 5820K which can do one hour of Asus realbench stress test at 4.5Ghz with 1.195v but so itchy to get Broadwell-E that's all. :D
BTW, is it worth to get the 5960x for £800 which can do cinbench R15 at 4.7Ghz with 1.92v?
Click to expand...

Two sets though I take it? You'd want quad channel.
 
abui1806 said:
BTW, is it worth to get the 5960x for £800 which can do cinbench R15 at 4.7Ghz with 1.92v?
Click to expand...


That's a lot of volts for 4.7. :


y91TutYh.png

yhRmwUOh.png
 
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I can get 4.6GHz on 1.4v but I wouldn't stay that high without a custom water loop - so certainly not for an ITX project.

I can get 4.4GHz at 1.3v which is much better on the temps and it's happy with a 280mm AIO cooler.

4.2-4.3 is stable on stock volts.
 
setter said:
Currently they dont seem to clock as well as the latter batches of older 2011 cpu's, J batch being the ones of note. Which took a while now tbh. So this will probably happen too as the manufacturing process matures.
Click to expand...

Panos said:
Yes however J batch on Haswell-E took them more than a year to get (the first came out 2014) there.
Click to expand...

The thing is the J batch CPUs havent really increased the max headroom for overcocking on Haswell-E they still all seem to have the same hard wall of 4.5-4.6

J batches only do it at much lower voltage compared to the initial early batches
 
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