Xeon L5639 Overclocking on X58

[Ruiner1]

I just pulled the trigger on a 5675 as well, replacing an L5639. My existing chip is running happily at 200bclk, so I know the MB is capable. Can't wait to see how far I can push this one I'll be trying out your voltage settings too Burpo!

 

[Trinamo]

That's awesome! Burpo gets his five-oh! Not him exactly, but someone he helped on the internet. ;-)

What voltage is required on this 5675? Also shouldn't it be 4.9 on all 6 cores, 25 x 196?

Anyhow, congratulations! Now render some bluray images for Burpo! ;-)

You're right, i mentioned that when its kicking full turbo 4 are the 4.9 and the other two are smacking almost 5.1. His voltages are almost exactly what mine are. Vcore under load is about 1.448 and it hit an occasional peak 1.54. Mine has been running with nearly identical voltages for months. With his temps being as good as they are he may run with it. He backed down to 190 for now until his new GPU's come in and he gets the RAM configured the way he wants it.

 

[ClockHound]

My 5660 can hit 4.66 around that vcore, but it's more volts than I'm comfortable with. Chip seems happy to take it tho and has seen worse.

It is satisfying to see that big 5.1. The 5675 prices are getting near my must-buy cheapskate threshold too.

What coolers are you running?

 

[Trinamo]

I'm running a h100i on my 5650 and Dad is running some custom setup on his 5675

 

[cbn]

Got a dual X5675 machine up and running a few weeks ago
No OC though since it's a workstation, but man does it TEAR through Handbrake jobs!

What workstation is your dual X5675 machine?

 

[WhoBeDaPlaya]

What workstation is your dual X5675 machine?

..

 

[Burpo]

It's been 1 1/2 yrs since getting the X5650 and immediately overclocking it and putting it to work. None the worse for wear that I can tell. Still does what I need, no degradation observed..


Think an overclocked i7-4790K will make a 20Gb iso in less than 1 1/2 hrs? Nope, no way!
5930K would, but the chip costs as much as my whole rig..

 

[Mk pt]

My good ol' X5650 @ 4.14GHz kicks 4790k arse in rendering too.


Skylake-E will be a great upgrade.
Until then X58/X5650 will be the main rig.

 

[jforce321]

Yeah I'm not really a rendering guy nowadays since I dont do any editing, which is the only reason i changed to a more per core performance related setup for gaming. But I do have my original cpu/mobo/ram still sitting around in case I do plan on doing something with it.

edit: Well also it allowed me to run full sata 6.0 with better fan control and better memory controller in chip.

 

[surfin]

Newbie L5639 owner here.
Now newbie overclocker...
I got this on an X58 UD3 mobo with a lot of other nice stuff all for $600 on ebay a couple of weeks ago.
After buying a Noctua D14, last night I managed to get it up to 3816Mhz - 18 x 212. (18 is max).
Temps under testing are around 70 max.
The only other things I touched were uncore (12) and memory (x8).

Couple of software crashes this morning. My theory is memory, so I might loosen the timings. does this sound right?

I use this machine for Archicad renders which use all cores, so very pleased that now it clocks 867 on the cinebench R15. To do that with stock new bits would cost a LOT more.

One thing I don't know is why whenever I up the cpu voltage (or play in any way with any voltages) I get bsod.
I've tried a lot of things mentioned in this and other forums but no good.
So I read on....

Meanwhile I'm happy in the knowledge that my cheap chip can play with the big boys.
Also happy that quite big renders take minutes instead of hours so more money

 

[Burpo]

It's bclk making the s/w crashes. Happened here too with L5639 when above 207. That's really pushing these old cpu's.

 

[Ruiner1]

My L5639 would be 'stable' at 200bclk, as in I could pass 8hrs+ memtest and easily complete burn test, but it would occasionally crash under heavy use despite temperatures remaining under control at around 70C. The best way to crash it was to use repo to sync chromeOS source. You'd expect that to be mostly IO limited, but it was a killer when git starts checking out the branches. Dropping back to 190bclk fixed it, but after a year or so of running at 200 I started dropping to 180 to get stability.

Now I've got an X5675 running at 170bclk, which is ultimately only 650MHz faster than the 200bclk previously 'stable'. I've hardly had to tweak the voltages at all and my repo sync job works just fine. Load temps are around 55C. I also added a second set of RAM - getting all 6 sticks detected at boot has been quite a trial and still doesn't work every time but I think this is inherent in the platform from what I read. I suspect that the CPU could go a lot higher, but the RAM issue is a pain. You can't tell if it's going to work - it'll boot fine 99 times and then lose 2 sticks on the last try.

Triple channel RAM is getting hard to find, so I guess I'll leave it for now.

 

[ClockHound]

3X single sticks work fine - as long as they're the same model/timing/speed. It's what I had to do - diy matched set - works as expected.

Did have trouble running all 6 slots - one slot is persistently intermittent. Which is why I'm pondering 8GB sticks. 12GB ram isn't enough for some image/render/multi-tasking work. Using 3X4GB 1.5V now.

Need to decide on 1.5 or 1.35V DDR3L. Wonder if the IMC will be happier driving the low voltage variety. Anyone tried the low voltage stuff and noticed any benefit with overclocking?

 

[amittalkin]

Just grabbed a NEW fresh RMA'ed ASUS x58 Sabertooth from a local guy here in India for $130. Board was RMA'ed around an year ago and was lying around.

 

[MongGrel]

Just grabbed a NEW fresh RMA'ed ASUS x58 Sabertooth from a local guy here in India for $130. Board was RMA'ed around an year ago and was lying around.

Nice grab.

 

[Burpo]

Quite a few X58 boards on ebay. Prices are coming down. Currently there are 5 NEW EVGA SLI boards for $159 + ship

http://www.ebay.com/itm/NEW-EVGA-X5...611?pt=LH_DefaultDomain_0&hash=item1a01a79143

AsRock Extreme $149

http://www.ebay.com/itm/ASRock-X58-...400?pt=LH_DefaultDomain_0&hash=item463c546c30

 

[Trinamo]

This may be a stupid question but I feel the need to ask. I've heard of people doing crazy things for cooling on an overclock, liquid nitrogen and so on. I'm guessing to overclock that far, they are really pushing the voltages through the roof, am I correct? Next question is, are high voltages ok as long as the temp under load is in check?

 

[YBS1]

Yes, they are pushing the voltage through the roof. Colder will raise your "safe" ceiling. At a certain point though too much will be too much regardless of the temperature. That point of course will probably somewhat depend on how long it stays at that voltage.

 

[Burpo]

In my experience 1.5 volts is probably the max for air cooling. It gets pretty hard to control temps after that.

 

[Trinamo]

In my experience 1.5 volts is probably the max for air cooling. It gets pretty hard to control temps after that.

So if I'm back to mad scientist mode and can maintain under 75-80 while poking an occasional 1.6 I could be OK?

I was working under this theory last night and hit voltages up to 1.68 and peaked 81 running cinebench 15, scored over 1000 though. It was more to see if I could do it. Turbo on, blck over 220. Basing this theory I may try to look for a faster setting than where I've been running most stable around 208

 

[YBS1]

I've went up to 1.62 or 1.65 trying to get a benchable all core 5GHz, she wasn't doing it under ambient cooling at those voltages. Temps were within reason though, 4.9 was just all she had to give within reasonable voltages without sub ambient cooling. This was on CLC.

 

[Trinamo]

I've went up to 1.62 or 1.65 trying to get a benchable all core 5GHz, she wasn't doing it under ambient cooling at those voltages. Temps were within reason though, 4.9 was just all she had to give within reasonable voltages without sub ambient cooling. This was on CLC.

It was around 76F in the house, using h100i cooler in a pulling config, open case mx-4 paste

 

[YBS1]

You should be ok then for the occasional benching run at 1.65 or so, didn't harm mine, YMMV.

 

[surfin]

So if I'm back to mad scientist mode and can maintain under 75-80 while poking an occasional 1.6 I could be OK?

I was working under this theory last night and hit voltages up to 1.68 and peaked 81 running cinebench 15, scored over 1000 though. It was more to see if I could do it. Turbo on, blck over 220. Basing this theory I may try to look for a faster setting than where I've been running most stable around 208

So I'm running bclk 210 and super stable, 1.25V, up to 60deg under full load and doing 860 on cinebench 15.
My mb can only multiply to 18x though.
In real life using Archicad 18 my 1 minute test render (in AC18 it's totally in CPU and uses all cores) speeds up by 1 second for every +1 bclk then stops improving at about 212 bsod after that with my conservative volts anyway.
I've never tried more than 1.4V.
Maybe for a working machine.... A few seconds.... not really worth trading stability for speed.
200 bclk with the resulting 1600 memory is only 4 seconds slower...

 

[Trinamo]

So I'm running bclk 210 and super stable, 1.25V, up to 60deg under full load and doing 860 on cinebench 15.
My mb can only multiply to 18x though.
In real life using Archicad 18 my 1 minute test render (in AC18 it's totally in CPU and uses all cores) speeds up by 1 second for every +1 bclk then stops improving at about 212 bsod after that with my conservative volts anyway.
I've never tried more than 1.4V.
Maybe for a working machine.... A few seconds.... not really worth trading stability for speed.
200 bclk with the resulting 1600 memory is only 4 seconds slower...

Those are great voltages. For whatever reason it seems like my aliendell MB requires a tad more than others I've seen on here. These voltages I'm discussing now is just theorizing. I typically run 207bclk around 1.48vcore 20x with turbo enabled. Very stable for months no issues, I can get 211 with the same voltage but there I literally one program that won't run that way I found.