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dell custimized 1kw power supply

post #1 of 12
Thread Starter 
My mother board supports SLI and i have 4-6 pin pcie connectors. I have a 1000 watt PSU. I have a dell xps 730 and i talked to a dell chat person. He said my system can handle sli. I am wondering if it can handle the new gtx 590. Should i just chat with dell again and ask?wink.gif
post #2 of 12
Your system will be able to handle sli just fine, in fact you could do tri-sli.
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post #3 of 12
Yes a 1,000W psu is more than capable of a gtx 590 and the rest of your system. You would be fine with a 850W psu.
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post #4 of 12
To convert the four 6-pin PCIe connectors, I highly recommend you to use a cable like this:
http://us.estore.asus.com/index.php?l=product_detail&p=3427

It converts two 6-pin PCIe power connectors to one 8-pin PCIe power connector.

So, you will need two such cables to get a total of two 8-pin PCIe connectors because a GTX590 needs that.

Edit 1:
Try to avoid using ''(2) 4-pin Molex to (1) 8-pin PCIe adapter''. First, it is harder to find. Find one for a 6-pin is easier. However even so, this is a last resort. Use them only when the PSU does not have native PCIe connectors available. And when using such a conversion, exercise extreme caution regarding the rail distribution of the PSU.

And, remember that one 6-pin PCIe connector supplies 75W while an 8-pin connector is rated for 150W. So, converting (2) 6-pin PCIe connectors to (1) 8-pin PCIe connector is very reasonable.


Now, a head ups for the thermal management of your GTX590 inside your XPS730 case:
Your current BFG GTX260 Core 216 OC has the reference cooling design, ie with air intake by the card's fan and hot air is exhausted to the rear. This uni-directional air flow is no problem at all.
However, the GTX590's reference cooling design is bi-directional. The card expels hot air to both the front and the rear of the card (see pic 1 below).

The front exhausted hot air will run against the airflow intaken by the case's front intake fan (green arrows as in pic 2). This front intake fan of the case is responsible to supply fresh ambient air to the card. Its airflow might push the hot exhausted air back into the card. This is disastrous. I suggest you to DIY something there to prevent the 'collision'. (I imagine you can confirm the need for this measure by noting whether the temp is higher for that core).
Edited by windfire - 3/24/11 at 8:10pm
post #5 of 12
If you have unused molex connectors, there should be an adapter for 2 molex to 1 8 pin. Two 6 pins to one 8 is unreasonable.
    
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post #6 of 12
Yeah, you can do it just fine. My 650w PSU could SLI GTX 570's which eat about 450w of power at load when I'm not running furmark or something like that. 1000w is way more that enough for a GTX 590. Also, Dell PSU's are Delta which are high quality
post #7 of 12
Quote:
Originally Posted by CrazzyRussian;12860300 
Yeah, you can do it just fine. My 650w PSU could SLI GTX 570's which eat about 450w of power at load when I'm not running furmark or something like that. 1000w is way more that enough for a GTX 590. Also, Dell PSU's are Delta which are high quality

They also use LiteOn, FSP, and a few other makers to an extent. But the XPS series all use Delta.
post #8 of 12
Thread Starter 
Thanks for the help guys i was going to get a hole saw and and drill a hole in side of the case for a 120mm fan and use that as an exhaust fan. I don't know if i want that because i am not sure how it will affect the airflow. I was thinking i could buy a new case and swap the components into a new case. Give me any ideas if you want.
Edited by Ugly Duck - 3/25/11 at 4:37am
post #9 of 12
I think the internal airflow design is fairly good and was well thought out by Dell. So, I would suggest against messing with it. I once helped 2 friends (one has a 720 and another has a 730) to upgrade their graphics card and so I had previously given some thoughts to this Dell's airflow pattern. Twice I installed card with externally exhausting cooling system in order to match the Dell's design.

Migrate the entire PC to a new case is an idea.

Yet another alternative is to get a pair of GTX570s (vs a single GTX590) if there is at least an empty slot in between 2 SLIed cards.
1. Performance: GTX570 SLI will be just as good as a GTX590
2. Power: Two GTX570s need four 6-pin PCIe connectors which your PSU has
3. Thermal: GTX570s with reference cooling (ie air intake by the card's front fan and exhausted through the card's rear slot) will not mess up the Dell's airflow design. Fits perfectly as far as airflow is concerned. (See pic below)

So, the question is the layout of those PCI slots on the X58-based motherboard of your XPS730.
(Another check is to make sure the upper card does not get into the USB and Front Panel cable headers along the edge of the mobo).
Edited by windfire - 3/25/11 at 7:08am
post #10 of 12
Thread Starter 
2 gtx 570's seem ideal to my solution. The oinly problem is my sound card would sit in the middle, wonder if this would be to much heat for my sound card. I might just get a cooler master haf x 942 or Corsair Obsidian Series 800D. what do you think is the best solution?
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