sli Titan Black Overclock - Lower FPS

m3ntal

m3ntal

m3ntal

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15 Dec 2014
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3
Hello

I'm pretty new on here, haven't posted before, so hello to one and all.

I've been researching now for the past few months with regards to an overclocking problem I'm encountering wth my sli Titan Black setup.

I'm using MSI Afterburner, monitoring with GPUZ. I've also tried exactly the same procedure with EVGA Percision with the same results.

I've slowly began to overclock my Titans, I increased both core and memory clocks in small increments of 5, I unlocked the core in MSI Afterburner settings and placed the VCore on the main GUI to 106. No regardless of whatever overclocking MHz I use I consistently achieve worse FPS than that of the stock Titan's. In actual fact whilst leaving the Titan's at stock I still get very poor FPS with Unigine 4.0 at all settings with the program. The best FPS I've had is around 40/50, this is pretty bad right ?

I then tried to run a benchmark with Tombraider, both overclocked and stock, the results were equally as bad at Ultra settings within the game. My FPS were around 30 FPS.

I'm obviously doing something wrong here, this is the first overclock I've ever attempted so please excuse my ignorance.

A brief of my machine is...4960k cpu, 2 Titan Blacks in sli with custom watercooling, Asus Rampage IV black edition. I have 2 VDU's, the Asus ROG swift 144 refresh and a UHD 4k TV, which are both equally as poor when using my overclocks.

I had my system built for me by Overclockers around 6 months ago which the did perfectly, absolutely beautiful looking system.

If anyone can help me out here I would be greatly appreciative. If you guys require any other information just ask.

And a big thank you in advance.

:)
 
Hello

Here is a spec of my machine.

CPU = 4930k @ stock 3.9 'OEM' (watercooled)
MBOARD = Asus Rampage IV Black Edition (watercooled)
RAM = Corsair Vengeance Pro Red 16gb (2x8) DDR3 PC3-19200C11 2400MHz Dual Channel Memory Kit
PSU = SuperFlower Leadex Platinum 1000W Fully Modular 80 Plus
GRAPHICS = x2 MSI GeForce TITAN Black Edition 6144MB GDDR5 PCI-Express Graphics Card (Watercooled)

The graphics are on a loop by themselves, temps (crysis 3/BF 4/Arma 3/GTA 5) @ around 40 Celsius.
CPU TEMP is ~40-50 Celsius also under max settings
HDD = Samsung 250GB 840 Evo
Direct X 11
Graphics Driver = 356.86

Thank you :)
 
  • Make sure VSYNC and GSYNC is off for your benchmark / game.
  • Make sure your cards aren't hitting their thermal limit and throttling (I find using MSI Afterburner OSD easiest for this, monitor the clockspeeds and temp)
  • Don't overclock core and memory at the same time, just do core first. It is by far the more important of the two anyway.
  • I read somewhere that the memory has a level of error correction so you can sometimes push it further than it should really go and performance drops because of it.
  • Using GPU-Z make sure your cards are on the correct PCI-E standard and x16 if possible (says something like Bus Interface: PCI-E 3.0 x16 @ x16 3.0 also a it is SLI make sure to check both cards while under load)
  • When you say VCORE i assume you mean power limit? Yes, stick that as high as you can and make sure the priority is set to power not temp.
  • You're probably fine whacking the core voltage all the way up (as long as you haven't bypassed the inbuilt limits) as long as your cooling can handle it. Do this once you've tried everything else though.
 
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What are your temps like on the cards?

If your overclocking them the temps might be increasing to the point of throttling causing performance to drop
 
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