New build with Titan X
Hmm sorry for confuse Zilent, i check this case in some store web page - not in producer site. Mayby they got wrong informations
(08-22-2015, 01:48 PM)Szulik Wrote: Hmm sorry for confuse Zilent, i check this case in some store web page - not in producer site. Mayby they got wrong informations

No problem, I'm just glad you help out, thanx. So no obvious technical problem choosing the MSI MB over the Gigabyte MB?
Two cents from my view:
- max out the RAM to 32GB; i read somewhere you should have at least as much RAM as you have on your GPUs; with complex rule jobs on huge wordlists RAM could be a problem
- you don't need a mobo with a Z97 chipset; take a Z87 and save yourself some money; performance of the system will be the same; Gigabyte GA-Z87X-OC Force, MSI Z87 XPower or ASRock Z87 Extreme9/ac are good choices
And a third thing: i'm not shure if the PSU is ok with only 1500W. Maybe you want to upgrade to 1600 or 1700W to be on the save side. Power peaks are can be a problem, but full throttle you're running the PSU on more than 75% of its capacity. This will cost you some efficiency points and depending on how much and long you're letting the machine run it can burn some money over the year.
#15 (Price 215 USD) (Price 250 USD)

sorry Flomac, but "my" mobo is cheaper Smile
Actually, from where I'm from (Europe), the Gigabyte GA-Z87X-OC Force is cheaper than the GA-Z97X-Gaming G1 these days Smile

The difference between Z97 and Z87 doesn't seem to have influence for the build:

As for PSU I'll look into either LEPA G1600-MA[-EU] or some other LEPA PSU: - I haven't seen such powerfull PSUs from more "common" hardware brands (like Corsair).

I can double the memory without much cost at the moment.

Thank you Szulk and Flomac - I'll get back soon with an updated list.
So, this is the updated build list for my 4x GPU system (all cards inside closed chassis):

1 x LEPA MaxPlatinum 1700 (P1700-MA-EU)
1 x Gigabyte GA-Z87X-OC Force
1 x Intel Core i7 4790K / 4 GHz
4 x Kingston HyperX Savage DDR3 8 GB 2400 MHz
1 x Samsung 850 EVO MZ-75E500 - SSD 500 GB - SATA 6Gb/s
1 x Chenbro 19 4HE RM41300G EEB (RM41300-FS81)

Regarding the Power Supply. One could probably go with the 1600W (1700W peak) version:
LEPA G1600-MA[-EU]
Quote: "Ability to run up to 4-Way GPU (SLI / CrossFire) and Dual CPUs together without difficulty"

LEPA MaxPlatinum 1700 (P1700-MA-EU)
Quote: "Able to run 4-way GPU (SLI / CrossFireX) and dual CPUs together without difficulty"

So I haven't decided on that, but the price difference is minor.

Obviously, if I lived in a country, where the z97 version of the MB (like GA-Z97X-Gaming G1 rev. 1.0) was cheaper, I'd go for that, but here it's a lot more expensive actually (double up).

Any last concerns to address?
That motherboard is going to choke airflow with 4 cards. you'll want two slot separation between PCIe connectors. Unfortunately no motherboard exist for this.


GPU1 | open slot | open slot | GPU2 | open slot | open slot | GPU3 | open slot | open slot | GPU4

Here's a motherboard I bought for this but it only has 3 GPUs.
If you're using reference design cards with the RM41300-FS81 then you can safely stack 4 GPUs on top of each other without a gap in between each. Temps will be a little bit high, but should still be well within specs.

Just make sure you have the lid fans configured to where they are intake fans, not exhaust fans.
(08-22-2015, 01:41 PM)Zilent Wrote:
(08-22-2015, 09:12 AM)epixoip Wrote: Yes, the GPU you linked to above is reference design.

Pefect, thank you! For next time - how does one check?

Reference cards have a shroud with the 1 smaller fan that expels hot air through the "exhaust" (a little vent next to where you plug in the HDMI cable)

Non-reference cards are more open-air style with 2 or 3 fans. Often there is an air gap between the shroud and exhaust making heat expulsion less efficient.