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[Build Log] Saturn V (TX10-D + pedestal, quad-fire, Monsta rads, 4k gaming funs). - Page 8

post #71 of 104
Thread Starter 
Quote:
Originally Posted by alltheGHz View Post

750w should be enough to power a single gpu system?


Think you're confused:

System#1
750w #1: Crosshair IV Formula/965be/GTS-8400/hdd/

System #2
1000w: G1 Z170/6600k/fan-control/ssd/295x2 #1
+
750W #2: 295x2 #2


So, the second second 750w psu will power only the second 295x2 graphics card. Its not enough to power both the system and one 295x2. The 1000w unit will do the system and the first 295x2.
Quote:
Amd 295x2 power requirements:

28 amp rail per 8-pin or 50 amp rail combined.

The second 750w psu has 62 amps so it should handle one 295x2 on its own.



For comparison reasons, the Lepa G1600 has six rails: 20 amp, 20 amp, 30 amp, 30 amp, 30 amp, & 30 amp.

The first two rails are for the cpu and mb. The last four are assigned to the pcie and accessories (ie molex, sata). So, each 8-pin on each 295x2 was assigned its on rail as it meets the minimum 28 amps per 8-pin. Its crucial to know which connectors on the psu are assigned to which rail. When i got this psu, another owner/member educated me on this before I fired up that system.


Furthermore, had I gone w/ something like the EVGA 1600 G/P, it has a single rail rated at 133 amps, so it wouldn't matter which connectors on the unit itself as they're all going to the same rail. The AX1500 has a unique feature where it can be ran in "multi rail" mode and some ppl had issues with this unit and crossfire 295x2. Apparently, it does this on its own, unless you turn it off and reverts to single rail protection.


Its more complicated to run multiple psu's, but in the end, the cost was less then half of a new ax1500 or evga 1600 and not including an additional unit for the crosshair setup. I've always kept my eye on a used unit, but still, evga's go for $250+ and the ax1500 ~$250-300. A few months ago, one used AX1500 with no cables (just the power cord), auction ended ~$350+. I kept it in my watch list in case if the winner bailed but it sold.
Edited by wermad - 1/29/16 at 10:49pm
post #72 of 104
Wow that was a detailed post for such a small comment, thank you very much for the in depth explanation!
post #73 of 104
Thread Starter 
Np thumb.gif. Owning a 295x2, you end up learning a bit more about psu's and how they work.
post #74 of 104
Thread Starter 
I spent a couple of days sorting out all psu's and getting the old one ready for sale. Unfortunately, due to a, ahem, miscalculation, two units don't fit. Only the 1000w unit fits in the 3rd position. So, after doing some more research, I ended up going with a slight modification. I'll be using 2" standoffs to push back the psu bracket on the CL. This will definitely ensure the 180mm long and fixed cables of the psu's clear the tube/fittings/rads. After doing some more reasearch, I may go w/ some Cooler Master V series to get full modular units. Its a pain having to manage unused fixed lines on the 1kw unit but I'll have a bit more room now. This mod leaves a gap which is a benefit as the CL psu position is a bit stuffy. I'll be covering with mesh I found in my parts bin. I have some angle power cords and it should be that much of an eyesore as its in the rear of the case.


My plugs are still in limbo. The tracking # for DHL didn't work and its been over seven days (max they recommend before something shows up). I've had fast responses from this seller before but I have not heard from her in these last two days when I messaged her. i finally got a reply from the seller, and as typical, just bs you get and apparently, this is a common excuse of aliexpress sellers. According to the seller, my package was sent via train to DHL in HK and it got delayed due to a "holiday" and the courier was backed up. Not surprising, as soon as I start *****ing (tbh, I have a right to tongue.gif) the tracking miraculously now has info. It shows that the tracking was just activated w/ DHL and pending drop off. After going through the bs w/ the last seller and now with this one, I regret not paying a bit more and going with the first seller I've delt with. At this point, the package is on its way, so I might as well wait one more week. Well, if you read the aliexpress reviews, this happens all the time. A lot of ppl don't know that aliexpress holds the payments in escrow and will not release the money to the seller until the buyer confirms "goods received". There's a processing period sellers must comply by (can be extended by the buyer and seller can ask for additional "processing" time) and this is to cut back on selling non-existing or incoming inventory. So, to buy themselves more time, I've read some sellers buy tracking #s in bulk that are not active. The shipping time frame is longer depending on the shipping option so its a way the seller can add more "processing time". But the #s are never activated with the courier so the seller can send you a tracking # and they'll say it could take a week for the tracking to activate. Now the buyer can cancel if either of these windows have passed and the they request a dispute/refund. Since my first plug order never got delivered and it was past the processing and shipping time lines, i was able to file a dispute and a week later, the order got cancelled and my money was refunded.


Spacers and screws should be in within the next couple of days. I chose steel (plated) as I felt aluminum standoffs may not hold or can easily break due to the amount of weight. They had brass but I've had fittings sheer off there threads and most fittings are made of brass. The standoff screws right into the CL modular mounting holes of the rear and then I'll screw down the psu plate w/ some new 10-32 button style hex screws. If this works out in the end, I may just go w/ the red Bitfenix extensions but I'm leaving the option of going w/ cooler master v psu's as well (v1000, v850, & V750).


On a happier note, my RVE came back, intact and stamped like crazy "return to sender". More then three weeks to resolve this. Well, at least this is one stress I can remove. I got a few ppl interested in this beauty but no takers yet. The listing has been updated if anyone wants this beast. I keep looking at the oc key and I'm fighting uber temptation in keeping it....tongue.gif. G1....black, red, and.....white! Free water cooling "block". Actually, its just a black chrome plated copper pipe running through the heats biggrin.gif


I'm brain-storming some mods I can do in the mean time until the plugs come in as well as the psu mod hardware.


edit:

Gave the 1kw unit a squirt of satin white as it looked a bit yellowish/brownish from use. It also helped clear up the good amount of dust accumulated inside. Lastly, i severed off the useless second cpu, vga, and sata fixed cables. I capped each wire w/ 1/8" heatshrink, then bundled each group with larger heatsink all while leaving a small gap above the tip of the cut wire. Here, some hot glue was added to fully insulate the cut wires. i only left the 24 pin and the first cpu cable. A pita to put back together and I managed to dent the soft paint, but its looks better then before (albeit, I accidentally trashed the sticker doh.gif). There's also a couple of shots on some testing I'm doing....devil.gif






Edited by wermad - 2/2/16 at 10:23pm
post #75 of 104
Thread Starter 
They're finally here! wheee.gif



What an odyssey just for this small detail. I placed an order for the extensions (bitfenix, red) and I ordered a couple of the silverstone i/o drive bays and ordered some usb 3.0 extensions. it sucks i can't find the lian unit (has 600mm of cable length). Also, ordered some cheap audio headers for the front i/o. Lastly, picked up some vented slot panels to help both chambers exhaust a bit better.

Edit:

Here's the psu mod:


Edited by wermad - 2/4/16 at 4:23pm
post #76 of 104
looking good wermad! smile.gif
post #77 of 104
Excellent news re plugs. There seems to be lots of sellers on AliExpress that 'stock' Barrow parts. Do you have a suggestion re which to use?

I'm going to price my connectors out at PPCs and at an AliExpress shop and see how much I 'save'.

Edit: Based on current fittings requirements, PPCs would cost about $250 while AliExpress would be $115 (both quotes are sans postage and excluding the 'cost' of waiting for the package to arrive). Hmmmmmmmmmmmm thinking.gif

Edited by ruffhi - 2/5/16 at 7:29am
post #78 of 104
Thread Starter 
Quote:
Originally Posted by Cyb3r View Post

looking good wermad! smile.gif

Thanks dude! I was doing some painting yesterday and I'm changing one color. I've always been a fan of satin black, but its really hard to get right over a large surface. My test sample came out great but a larger panel came out a little disappointing w/ a few "over spray" spots. But what blew me away was the matte white I reluctantly didn't want initially. It came out very good and really matches the texture of the CL powder coating. So, time to return a box full of satin black and get matte black smile.gif.
Quote:
Originally Posted by ruffhi View Post

Excellent news re plugs. There seems to be lots of sellers on AliExpress that 'stock' Barrow parts. Do you have a suggestion re which to use?

I'm going to price my connectors out at PPCs and at an AliExpress shop and see how much I 'save'.

Edit: Based on current fittings requirements, PPCs would cost about $250 while AliExpress would be $115 (both quotes are sans postage and excluding the 'cost' of waiting for the package to arrive). Hmmmmmmmmmmmm thinking.gif

I'll send you a pm since its frowned upon to link such sellers (like ebay as well). This was the first seller that handled my first two large orders. She was able to work with me on shipping cost and type. The second seller was pretty quick but I only bought the reservoirs from them and it came via "e-packet" (aka China mail). It was actually very quick (less then two weeks). This last order shipped very quickly via DHL but that's expected. I didn't expect it to be 2 weeks for processing. Its really a gamble on aliexpress. Also, check out the ebay sellers as smaller quantities might be cheaper w/ them.
post #79 of 104
Quote:
Originally Posted by wermad View Post

I'll send you a pm since its frowned upon to link such sellers (like ebay as well).

Thx - sorry if I stepped on some forum rules. I've also found Barrow parts on newegg.

Edit Updated prices (sans postage) based on actual fittings I think I need ...

PPCs (using bitspower) $340
Newegg (using Barrows) $255
AliExpress (using Barrows) $155

When you are looking at a $5k total build cost, these differences are pretty minor ... but these are the sorts of decisions that make that $5k only $4.5k.

Edited by ruffhi - 2/5/16 at 4:48pm
post #80 of 104
Thread Starter 
Cool, didn't know that thumbsupsmiley.png
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