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NVIDIA GeForce GTX Titan Z Owners Club - Page 39

post #381 of 547
My GPU temps are already ~35C so that seems pretty good, and I'd rather spool that fan a bit higher than run 2 additional fans. May try it though when I start to properly stress the system (when 700W arrives). The radiant heat from the GPU is really only from the back plate and will also upgrade to a H100i shortly which will be positioned to put airflow over that area. I think I may install some ducting to stop the airflow from the second GPU core getting entrained into the PSU fan but that will be some time away.
post #382 of 547
It's load temps that should be your main concern. Getting 2 fans or at least 1 fan is your best bet once you get your new PSU and overclock it to hell.

http://www.amazon.com/Prolimatech-Ultra-Sleek-Vortex-120x120x15mm/dp/B00G9WDYEC/ref=sr_1_7?ie=UTF8&qid=1443654971&sr=8-7&keywords=120mm+15mm

Great 15mm fans.

And 14mm 92mm if you want one to help exhaust the heat from h100i.

http://www.amazon.com/Noctua-Low-Profile-Cooling-Blades-NF-A9x14/dp/B009NQM7V2/ref=sr_1_2?ie=UTF8&qid=1443655267&sr=8-2&keywords=noctua+92mm

Just giving some friendly advice. Have fun with the build and be sure to post some benchmarks when you can! thumb.gif
 
Black Beauty
(8 items)
 
 
CPUGraphicsRAMHard Drive
6950x @ 4.3/3.5  Titan X Pascal SLI +200/+575 64GB Crucial Sport LT @ 2800mhz 512GB Lite-On SSD 
Hard DriveOSPower
2 x 4TB WD HDD's Windows 10 OEM GOLD 1500w 
CPUMotherboardGraphicsRAM
7700K @ 5.0ghz 1.3v Delidded w/ CLU EVGA Z270 Classified K EVGA GTX 1080 TI Hybrid SLI 32GB Corsair Dominator @ 3733mhz 
Hard DriveCoolingPowerCase
3 x 525GB Crucial MX300 in Raid 0 EVGA CLC 120mm EVGA 1000W G2 NZXT S340 Elite 
CPUMotherboardGraphicsRAM
Intel 5820K 4.8GHZ EVGA Micro 2 X99 GTX 1080 FE SLI Corsair 32GB Dominator 3200MHZ 
CoolingOSMonitorPower
Corsair H100i V2 Windows 10 Seiki Pro SM32UNP 4K EVGA P2 850W Platinum  
Case
Corsair Air 240 
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Reply
 
Black Beauty
(8 items)
 
 
CPUGraphicsRAMHard Drive
6950x @ 4.3/3.5  Titan X Pascal SLI +200/+575 64GB Crucial Sport LT @ 2800mhz 512GB Lite-On SSD 
Hard DriveOSPower
2 x 4TB WD HDD's Windows 10 OEM GOLD 1500w 
CPUMotherboardGraphicsRAM
7700K @ 5.0ghz 1.3v Delidded w/ CLU EVGA Z270 Classified K EVGA GTX 1080 TI Hybrid SLI 32GB Corsair Dominator @ 3733mhz 
Hard DriveCoolingPowerCase
3 x 525GB Crucial MX300 in Raid 0 EVGA CLC 120mm EVGA 1000W G2 NZXT S340 Elite 
CPUMotherboardGraphicsRAM
Intel 5820K 4.8GHZ EVGA Micro 2 X99 GTX 1080 FE SLI Corsair 32GB Dominator 3200MHZ 
CoolingOSMonitorPower
Corsair H100i V2 Windows 10 Seiki Pro SM32UNP 4K EVGA P2 850W Platinum  
Case
Corsair Air 240 
  hide details  
Reply
post #383 of 547
Load temps- will see what they are like when I get there lol. Sounds like Silverstone are still tweaking their new PSU design so may be a little while!

Yeah an exhaust fan could help, going to have a real think about the airflow when I am nearer to finishing the build. Thanks for the ideas, will post some benchmarks when I can!
post #384 of 547
Hello everyone, My name is Fred and I am a returning hobbyist after 15yrs....yes I built systems with pentiums DX2/66's all the way up to Pentium III's running 1.5ghz and man, we thought those computers were the $hit but man, what you guys have to play with today is amazing and I wanted back in so here I am.

I just purchased an EVGA Titan Z for this new build. I have been reading much about water cooling systems these days and I'm having a very difficult time finding a cooler for this card from any online seller in stock. It would appear that they have stopped making them for this card but I just started reading and researching so I could be wrong. Could I get some help from you guys as to where I may be able to secure one? It looks, from pictures I've seen, that the block for TITAN X and TITAN Z appear similar but I have not seen that discussed anywhere. Anyway, thanks for reading and if you can help that would be appreciated.
post #385 of 547
The Titan x block and Titan z block are vastly different.
post #386 of 547
Doug, did you make that water block for the Titan Z? If so.........WOW ! Do you know where I can buy two? I have two Titan Z cards and cant seem to find any WC for the titan Z. Any help would be greatly appreciated..

Oh and has anyone found a modded bios for the titan Z card? If you know of one, or have one.....would you mind sending it to me with instructions if possible?

Thanks in advance!

Scott
post #387 of 547
I think I just bought one of these second-hand for 650 €. Good deal? I don't know, but willing to try out. Hopefully it works out of the box as it doesn't come with a warranty.

I don't see any waterblocks around. Someone is asking 450 € for an EVGA block in eBay..lol. biggrin.gif
post #388 of 547
Can somebody enlighten me in the following? Are the any differences in overclocking possibilities between a single dual GPU card and two single cards with the same GPU? What I mean is that dual GPU card gets power from a single PCIe slot. PCie slot is limited to 75W of power which has to be divided between the both GPUs while in the case of two cards each GPU can get 75W of power. Similar thing is additional power connectors on the cards, Titan Z has two 8-pin connectors which are rated 120 W each for the total of 240 W. This brings total rated power consumption for the Titan Z at 315 W. For the single GPU card with 8-pin and 6-pin connectors their rated power is 200 W and total power for single card is 275W. For two cards the power is 550W which is much higher than the 315 W for a dual GPU card. We can assume of course that total power supplied can be higher than that but there are limits on this.

The question thus is: Is there any limitation on overclocking the dual GPU card due to limitation on the power supply as compared to two single GPU cards?

For concrete example: I have two Titan X SLI watercooled with overclocking at 1505 MHz. The cards consume then between 350-400 W each peak which gives 750-800 W for both. If there would be dual GPU card with Titan X chips it seems to me it would be impossible to provide it with the equivalent power and thus its overclocking range would be limited
by the total power which can be delivered to a single card. Is this true?
post #389 of 547
Quote:
Originally Posted by wirk View Post

Can somebody enlighten me in the following? Are the any differences in overclocking possibilities between a single dual GPU card and two single cards with the same GPU? What I mean is that dual GPU card gets power from a single PCIe slot. PCie slot is limited to 75W of power which has to be divided between the both GPUs while in the case of two cards each GPU can get 75W of power. Similar thing is additional power connectors on the cards, Titan Z has two 8-pin connectors which are rated 120 W each for the total of 240 W. This brings total rated power consumption for the Titan Z at 315 W. For the single GPU card with 8-pin and 6-pin connectors their rated power is 200 W and total power for single card is 275W. For two cards the power is 550W which is much higher than the 315 W for a dual GPU card. We can assume of course that total power supplied can be higher than that but there are limits on this.

The question thus is: Is there any limitation on overclocking the dual GPU card due to limitation on the power supply as compared to two single GPU cards?

For concrete example: I have two Titan X SLI watercooled with overclocking at 1505 MHz. The cards consume then between 350-400 W each peak which gives 750-800 W for both. If there would be dual GPU card with Titan X chips it seems to me it would be impossible to provide it with the equivalent power and thus its overclocking range would be limited
by the total power which can be delivered to a single card. Is this true?

The titan z = 375w and 2x 8pins from the spec sheet on the nvidia website which makes it a 375w solution vs the 250w solution of a normal titan.

The reason these cards exist is for people with only 1 pci-e slot / lack of connectors for whatever reason / lack of space.

The titan z will downclock also the moment it pushes past he 375w or when it heats up to much.

So to answer your question, yes they are limited not only by heat output ( which can be fixed through water cooling ) but also through power limitations. Reason why people didn't bought this card.

Reason why people bought 295x2 was because of it's free watercooling and still get great performance for a solid price ( when the price lowered ). ( while the 290's where junk at the start ).


Titan x = 8 pin + 6 pin = 300w
Titan x (x2) = 8 pin + 8 pin + 8 pin + 6 pin = 600w.

But then there are different versions of titan x, i believe there even are water cooled 4x 8 pin versions.

So yes dual gpu solutions will always stay inferior, even while you can water cool to get rid of the heat on dual gpu cards. A single card will cool better on it's own watercool solution and therefore also gain more gains.
post #390 of 547
^Thank you for your in-depth reply. I wonder if somebody would be able to quantify how inferior is a dual GPU card versus two single GPU cards with respect to overclocking in practice? Has somebody experimented with comparison of overclocked watercooled Titan Z vs. two watercooled Titans?

Regarding the Titan X I never heard about this card being available with 4x8-pin connectors. Titan X is amazing from overclocking point of view and an enormous power it can suck then. This could be the reason why there is no dual GPU Titan-X-type card.

Added. This puts more light on the power supply of dual GPU cards: ...the Dual Core R9 295X 8GB graphics card has been released and adheres to new up-and-coming unofficial standard. This card takes a special power supply, few of them are capable of these new numbers. This card needs 112 watts per line and 336 watts for each of the two 8 pin PCIe connectors. This opens a can of worms that only an enthusiast can understand. The average novice that buys this card will connect it to an inadequate power supply in spite of the warnings. All of the compatible power supplies listed are over 1500 watts. Read about it here.

So it looks that power supply limitations for dual GPU cards are eliminated by going beyond the standard connector maximum values, 8-pin connectors is specified at 336 W instead of the standard 195 W. There is then no power restriction (if the 75 W PCIe limit for single slot does not matter), only the heat dissipation issues may remain but probably with pumping enough water the dual GPU card will not have performance different from two single-GPU cards.
Edited by wirk - 2/3/16 at 5:20am
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