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Overclock U2715H to 80Hz

post #1 of 13
Thread Starter 
Hello

I have just sold my Acer Predator XB270HU because I don't game enough and instead I've purchased 2x Dell U2715H

I like the look of these much more but I am missing the 144Hz even on my desktop

I took a look at these specs:
https://www.google.co.uk/shopping/product/9974307883914443835/specs?q=u2715h&oq=u2715h&ie=UTF-8&aqs=chrome..69i57j69i60j69i59l4.3061j0j7&sourceid=chrome-instant&ion=1&espv=2&bav=on.2,or.r_cp.&bvm=bv.122676328,d.ZGg&biw=2560&bih=1296&dpr=1&tch=1&ech=1&psi=jcFEV8zeHuGdgAaJqK64CA.1464123789734.3&sa=X&ved=0ahUKEwi385mUzvPMAhVMLMAKHX0QCdEQuC8IqgE

These state the U2715H goes up to 86Hz

So...

I overclocked both in my Nvidia panel - both overclock to 80Hz no problem, pass the frame skip tests fine, both won't go 1Hz over

My question is - are these really rated at 86Hz max - I know the default is 2560x1440 @60Hz

Am I doing them any damage?

Thanks for any advice
post #2 of 13
They may support 85Hz at a low resolution but they are definitely 60Hz monitors.

That said, to my knowledge, all multi-input 1440p monitors can't go past 60Hz without frame skipping. Did you follow the instructions shown at the top of the test page properly? It doesn't mean anything if it says "VALID".
post #3 of 13
Thread Starter 
Ah right yes I get you now

So even with a slight unnoticable stutter, I can run 80Hz without to my eye having a problem - is this dangerous?

Thanks
post #4 of 13
Thread Starter 
Also at 80Hz with stutter does that mean I am losing a full 20 frames, so is still in fact 60Hz?
post #5 of 13
I've run a few monitors overclocked for years. Might be harm might be not. Current P2416D runs at 75hz flawlessly.
U2
(13 items)
 
U1
(8 items)
 
SFF
(18 photos)
CPUMotherboardGraphicsRAM
i7 3770 Z77N-WIFI GTX 970 Turbo Kingston Valueram VLP 2x4GB  
Hard DriveHard DriveCoolingCooling
Kingston UV400 240GB ADATA XPG SX900 64GB Thermalright Macho Rev. B AC Accelero Mono Plus 
CoolingOSMonitorPower
Thermalright TY-147A Windows 8.1 Enterprise 64-bit Dell P2416D Cooler Master V450S 
Case
Jonsbo U2 
MotherboardRAMHard DriveCooling
MSI N3150I ECO Samsung DDR3 SODIMM 2x2GB Samsung Spinpoint F1 500GB CHECKMATE. IT'S PASSIVE 
OSOSPowerCase
Windows 10 Professional Ubuntu 16.04 LTS Thermaltake 220W Jonsbo U1 
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U2
(13 items)
 
U1
(8 items)
 
SFF
(18 photos)
CPUMotherboardGraphicsRAM
i7 3770 Z77N-WIFI GTX 970 Turbo Kingston Valueram VLP 2x4GB  
Hard DriveHard DriveCoolingCooling
Kingston UV400 240GB ADATA XPG SX900 64GB Thermalright Macho Rev. B AC Accelero Mono Plus 
CoolingOSMonitorPower
Thermalright TY-147A Windows 8.1 Enterprise 64-bit Dell P2416D Cooler Master V450S 
Case
Jonsbo U2 
MotherboardRAMHard DriveCooling
MSI N3150I ECO Samsung DDR3 SODIMM 2x2GB Samsung Spinpoint F1 500GB CHECKMATE. IT'S PASSIVE 
OSOSPowerCase
Windows 10 Professional Ubuntu 16.04 LTS Thermaltake 220W Jonsbo U1 
  hide details  
Reply
post #6 of 13
I run mine at 75hz 85hz with no issues and no stutter passes all test as it should.

SS
Edited by ssiperko - 5/25/16 at 5:35am
post #7 of 13
Thread Starter 
Ssiperko what is your monitor? Thanks Smanci - that is basically the newer version of mine in 24 inch I believe - good to know
Edited by SlammiN - 5/25/16 at 6:15am
post #8 of 13
Quote:
Originally Posted by SlammiN View Post

Also at 80Hz with stutter does that mean I am losing a full 20 frames, so is still in fact 60Hz?

I could be wrong but from what I could see, if you get frame skipping it will skip every other frame, so you get 40Hz.
post #9 of 13
Thread Starter 
Whoa that's really bad! So why do people over lock their monitors? As long as there is no frame skipping it's overclocked?
post #10 of 13
Quote:
Originally Posted by SlammiN View Post

Hello
I overclocked both in my Nvidia panel - both overclock to 80Hz no problem, pass the frame skip tests fine, both won't go 1Hz over

How did you test the frame skipping? I am using the tool on TestUFO and I'm getting a lot of skipped frames even at 65Hz!
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