Xeons with an open multiplier

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alex_stief

Well-Known Member
May 31, 2016
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AFAIK the last Xeons with open multipliers were E5-1650v3, 1660v3 and 1680v3.
I highly doubt that Intel will bring back this option.
 

capt crazy craig

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Jan 18, 2018
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guys

here is my info

it currently runs yes at 43x100 but is unlocked as per screen shot...

I believe a bios update shut this down as per the issues had with 3820 chips not being able to turbo all cores after a revision.

any info appreciated as im not confident to shell the £'s out for a e5-1650 v2 or e5-16xx etc if the board is locking this down
 

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Retrorockit

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Mar 22, 2018
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I'm working with unlocked CPUs on locked BIOS MB, OEMs mostly. I came across some unlocked Xeons not listed here, and a couple possibles.
W3570 is listed as unlocked at OCN, and W3580 also. These are 4 c/8t Nehalems and can be had for about $20.
Intel Xeon W3570 @ 4435.59 MHz - CPU-Z VALIDATOR
I'm finding a couple on the CPUZ W3570 chart recognized as W3565?
Intel Xeon W3565 @ 7217.65 MHz - CPU-Z VALIDATOR
The mystery chips are the dual CPU versionsW5580,W5590. There is a W5580 at CPUZ running 42x133
Intel Xeon W5580 @ 5612.23 MHz - CPU-Z VALIDATOR
I can't find a W55590 OC, and I've seen a couple fails. The rumor started with an article listing the W3570/80 as unlocked, and claiming the W5580/90 were too. Maybe they had ES versions?
I started a thread on unlocked multiplier overclocking using Throttlestop software. It only works with unlocked CPUs. The Dell T3500 X58 workstation seems to be the favorite for this.
Throttlestop overclocking Desktop PCs
 

Mirkoskji

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Apr 2, 2018
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Hello everyone. I'm new.
I've found your thread and got interested.
I have a x79 Rampage IV Black Edition with an E5-1660-v1.
My specific chip seems multiplier locked to 43x like the 1620 from capt crazy craig.
No matter how I tried I could not make it boot with anything higher than that.
On hwbot there are many examples of unlocked 1660's.
I don't know if it's the motherboard or the cpu that's holding me back
 

alex_stief

Well-Known Member
May 31, 2016
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Well if you can adjust the multiplier, the chip is not locked. No Xeon E5-1660 "v1" is locked afaik.
If it does not post with with more than 4.3GHz you either have a chip from the far left of the bell curve. Or you need to step up your game in terms of overclocking. Did you read and follow a few guides how to overclock on this particular platform?
 

Retrorockit

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Mar 22, 2018
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We've tested the W5580 and found out it isn't unlocked. No explanation for the 42x133 at CPUZ except maybe an ES chip.
Many BIOS won't give you the option of adjusting multiplier even on an unlocked CPU. Not just OEM systems but low end aftermarket also.
If you have an unlocked CPU and it won't overclock try the Throttlestop method which gives access to multiplier and Voltage on unlocked CPUs in Windows. I'm not familiar at all with E5 Xeons. LGA1366 is what I'm working with. Are there any SMP unlocked Xeons? The QX9775 is the only one I'm aware of (LGA771).
Here's the TS overclocking thread. We're all using Dell T3500s for testing but other systems are more than welcome. In fact we desire more TS results, good or bad.
Throttlestop overclocking Desktop PCs
FWIW Throttlestop can adjust Voltage and multipliers DOWN on locked CPUs. It was designed to undervolt and underclock laptops for extended battery life. It can adjust upward only on unlocked CPUs. It could be useful for testing to see what's unlocked and what isn't.
 
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Retrorockit

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Mar 22, 2018
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There are LGA1156 unlocked CPUs under 95W. The i5 655K 2C/4T, and the i7 875K 4C/8T. Is there an unlocked LGA1156 Xeon analog to the 875K?
 

Retrorockit

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Mar 22, 2018
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I just came across an issue that might affect someone here. The unlocked Xeons for LGA1366 are all single CPU versions. The memory controller is on the CPU. They can run in dual CPU systems as single CPU. Dual CPU systems support RDIMMs which at this time are cheaper than UDIMMs. You can also run dual CPU Xeons as single CPU.
THE SINGLE CPU Xeon LGA1366 CPUs DON'T SUPPORT RDIMMS. This includes all unlocked ones. They're i7 based and not true X5500 X5600 Xeons.
Later single CPU Xeons might work. I say this because the single CPU Dell T3600 takes RDIMMs. But then again maybe only with dual CPU Xeons running as single. IDK for sure. If a CPU supports 128-144GB RAM then it's RDIMM rated. If it supports 24-48GB than it probably isn't.
 

Retrorockit

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Mar 22, 2018
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I may have found an analog for the i7 875X. The Xeon X3470 fits the bill. LGA1156. I see some CPUZ with raised Multiplier but I've been fooled before. So it's unknown whether it's also unlocked. It could be based on the i7 870 also. then it wouldn't be unlocked.
I looked into this and the X3470 was released 9 months before the i7 875K existed, so it must be based on the i7 870 which was released at the same time.
 
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Retrorockit

New Member
Mar 22, 2018
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No I don't think it is. The unlocked LGA1156 were released as an afterthought. The Xeons for that platform were already out. I saw some raised multipliers at CPUZ but I've learned not to trust that.
 

Aluminum

Active Member
Sep 7, 2012
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Apparently the Xeon Platinum 8180 is unlocked...but only if you're an intel doing a PR dog and pony show.
 

Ez101

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Sep 3, 2018
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At this point would you guys recommend I try this out with x79 or buy a x99 motherboard and wait for prices to come down? I have been reading all the threads and researching like crazy this weekend - call it a binge lol. But I'd enjoy a project like this. I could just wait for the coffee lake 8 core later this year, but I expect that to be a 450-500 processor, etc. I would be ok with an x79 and 32GB ECC RAM. I have found that the ASrock Extreme boards allow the use of ECC memory and it's still cheap compared to the DDR4 counterparts. I am not in need of an upgrade, just want to have something to work on that when finished will be a strong PC and something I can use for a few years from here. I'd like some of the features of the x99 such as ultra m.2, but oh well. The E5-1680 v2 is about $400 on eBay and I think that's too high. I'd buy it if it were closer to 200. There are several of the E5 - 2XXXX processors around for less, I assume they are less because they can't OC. Overall I think I should have at least 8 cores maybe 10-12d going forward. Why? no good reason, except I feel that 4 cores are done and 6 cores will be an after thought as everyone / everything moves to 8-12. Just look at mainstream.