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[Official] - Xeon X5660-X58 Review & Discussion [and Xeon L5639 benchmarks inside] - Page 734

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post #7331 of 8005
Quote:
Originally Posted by OCmember View Post

What PSU do you have now? Makes me curious about my recent PSU purchase.

My PSU is Dated but I want from some coolmax 750w to a SuperFlower Leadex Platinum 1000w and man oh man the difference
Quote:
Originally Posted by kpforce1 View Post

I remember when I switched from a BFG 1200W to my ST1500W.... I could lower voltages across the board on my x58 classified setup lol. I couldn't believe the difference in stability. I know they are not very efficient by today's standards but I have two of them powering my SR-2 rig now.

...3000watts.... Did you really need it?
Quote:
Originally Posted by gofasterstripes View Post

These volts measured also will vary depending on how your DMM actually reads the voltage - there is always noise, even with DC measurements, so the DMM must decide what to actually display from the data - differing amounts of noise may change the value displayed...
Hence use a scope to view that stuff, not a VOM tongue.gif
post #7332 of 8005
Quote:
Originally Posted by GENXLR View Post


...3000watts.... Did you really need it?

Three OG Titans at 1400+Mhz, two cpus at 4.4+ Ghz, a gtx 670, 3 pumps, many drives, etc...yes...yes I did unfortunately.
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Force1
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post #7333 of 8005
Hello, if you remember I was wondering why I need such a high voltage (1,5 volts) to stabilize 4,4 GHZ and how it is possible to reach 4,6 GHZ with only 1,36 volts.

Now I could test another X5660 CPU a B-Batch model this time. The problem is that nothing has changed, the needed voltage is exactly the same and just too high. For 4,2 GHZ 1,4 volts are needed. How is this possible I mean is this also a bad CPU for overclocking, common oc results for the X5660 or is this a mainboard or power supply problem?
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post #7334 of 8005
It seems unusually high. Can you upload more of the figures you're using? BIOS photo or something.

NB I only use Gigabyte MoBo's.
post #7335 of 8005
Quote:
Originally Posted by gofasterstripes View Post

It seems unusually high. Can you upload more of the figures you're using? BIOS photo or something.

NB I only use Gigabyte MoBo's.

This is the stability test I ran with 4,2 GHZ and 1,4 volts. If I chose a lower cpu voltage then it crash with Bluescreen (124, 101, 3B etc.). To be honest because of the high voltage of 1,5 volts, it is not really possible to run this test long at 4,4 GHZ with 12 Threads, because logical the temperature is also too high with that high voltage.

Also it is a problem for the PSU I’ve, because it isn’t a high-end one unfortunately. It has 500 watts and 34 A two 12 v 18A rails. There’s no 80 plus, with the 4,4 GHZ and >1,5 volts the power draw rises to near 500 watts in prime 95 at full cpu load only.

Because of this it can crash with a instantly shut down like if you would pull the cable. I really need to buy a better power supply, but I’m not sure if the stability (how much voltage you need for overclocking) depends much on it therefore I ask.

Interesting might be that something could be wrong with my motherboard (Asus Rampage 2 Extreme), because at high voltages it sounds weird (constant high frequency sounds at load).


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post #7336 of 8005
Quote:
Originally Posted by gofasterstripes View Post

With 12GB and a 5650 the X58 ($250) would be better for work, in this case.

As before - 5650 is better value as up upgrade, 2500k better from scratch.

IMHO
When I read reviews on the net about the i7 920 vs the 2500k, almost all reviews state the 2500k to be the better gaming CPU.

But those are reviews from 2011, when the 2500k launched.

Games are different know.

Are they more multi-threaded in 2016 that Hyper Threading makes a big difference know?

How will CPU performance change with vulkan and DX12?

Will the 4 threads of the 2500k limit the performance and introduce stutter before the 920?

Is the X58 platform a better bet? Besides beeing older, it can take 6 core cpus. Will that make a difference in longevity for games this year and early 2017?

I know the 2500k has faster cores and better IPC. But I am afraid the CPU will come to 100% usage and start to stutter with future games that can use more than 4 cores.

Cheers!
post #7337 of 8005
Quote:
Originally Posted by 14600 View Post

Hello, if you remember I was wondering why I need such a high voltage (1,5 volts) to stabilize 4,4 GHZ and how it is possible to reach 4,6 GHZ with only 1,36 volts.

Now I could test another X5660 CPU a B-Batch model this time. The problem is that nothing has changed, the needed voltage is exactly the same and just too high. For 4,2 GHZ 1,4 volts are needed. How is this possible I mean is this also a bad CPU for overclocking, common oc results for the X5660 or is this a mainboard or power supply problem?

Sounds like a PSU problem to me, but I could be wrong. What are you using for a PSU and Motherboard?

Plus 3.6GHz QPI is getting a little out of stability range for normal volts. I'd push a little more volts into the QPI & IOH core. Try running them at the same volts e.g. 1.30v for both.

Your uncore looks like it isn't being pushed too hard at 3.2GHz but for the heck of it try 1.25v


EDIT: Wait a minute. You are running 32GB with HT on? try running 8GB with HT off. Sounds like it's too much memory controller pressure for the chip and the board.
Edited by OCmember - 8/5/16 at 7:34am
     
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post #7338 of 8005
@14600 : I agree entirely with @OCmember's post above. Try those tweaks and et back to us, but you may need a better PSU.

@Gdourado Dude, there are just too many varibles, price differences and API uncertainties for me to TELL you the 100% CORRECT answer. If you have $200, then I suggest the 2500k route. Personally I would say that, and I would also say that if you were going SLI and with a budget for a good X58 MoBo and enough money for trying a couple of 5650's to find the best one and also watercooling the whole thing at 4.6GHz or something [as some of the more high-end builds on this thread] - THAT would 100% be the best move. It's just going to cost a lot more than $200.
post #7339 of 8005
Quote:
Originally Posted by gofasterstripes View Post

That is true, and true of LED's or other semiconductor devices too.

Well, actually what happens is the power consumption will increase, so if you have an offset voltage function then the applied voltage will rise. Otherwise, with no offset or VDroop compensation then the voltage will fall, as the current drawn increases the VRM's output will begin to droop.

Anyway, yes it matters smile.gif


Hmm. That sounds a little different than what's happening with my system. Correct me if I am wrong. I don't use Vdroop or any off-set with the cpu vcore (actually there isn't an option for that), but like I said when running ibt the vcore reads 1.362-3 at the start then later on in the test it's pegged at 1.364v during the load. Does that sound like there is an issue with the PSU? Thankfully games only need 1.349v
Edited by OCmember - 8/5/16 at 7:36am
     
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post #7340 of 8005
That difference is so small it could be changes in the conductivity of the surface of the solder you're probing!

Nae worry lad smile.gif
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