Dell T3500 SLI?

You will need a new power supply.  This one would fit your needs.

Sorry but just to clarify on some weary queries if thats ok?

1. Will this power supply fit the computer?

2. Will it be compatible with the Dell t3500 motherboard? (I read that dell had issues making their motherboards proprietery so that a standard atx supply won't work.)

Ok thanks for you given response also!

According to the T3500 brochure, the T3500 has support for 2 PCI Express x16 Gen 2 graphics cards up to 225W including: NVIDIA® Quadro® FX 4800; NVIDIA Quadro FX3800; NVIDIA Quadro FX 1800; NVIDIA Quadro FX 580; NVIDIA Quadro NVS 295; ATI® FirePro V8700; ATI FirePro V5700;ATI FirePro V3750. Yet, this page indicates that the T3500 has support for 2 PCI Express x16 Gen 2 graphics cards up to 150 watts (total) including NVIDIA Quadro 5000; NVIDIA Quadro 4000; AMD FirePro V7900; AMD FirePro V5900; NVIDIA Quadro® 2000; ATI FirePro V4800; NVIDIA Quadro 600; NVIDIA Quadro NVS 420 quad monitor card; NVIDIA Quadro NVS 295; ATI FireMV V2260. (Dell documentation at it's best)

The thing to note is all of the listed graphics cards belong to the 'professional' range produced by either NVIDIA or AMD. These cards have certified 'professional' drivers, not your garden variety 'consumer' drivers. This may or may not be an problem but do note that SLI/CrossFire has licensing considerations on at least consumer grade motherboards that i am aware of. If the consumer class motherboard manufacturer hasn't paid their SLI/CrossFire tax, then the consumer graphics drivers will not allow SLI/CrossFire to function. Whether the same licensing considerations (tax) exist with the professional grade drivers, i do not know. It's a 'suck it and see' approach, else hopefully someone has actually tried consumer grade SLI/CrossFire on T3500 and can shed some more light on this :emotion-15:. So as you may now appreciate, it's also about SLI/CF, not just about power :emotion-9:

In any case, out of the two linked documents above, i would take the lower power as a safe starting point. As the high end professional Quadro 5000 uses 152W per card and as both documents state the T3500 has a 525W power supply, this would mean 150W per card this does not seem out of the question. Considering 2x 150W graphics cards would leave 225W for the rest of your computer (CPU, memory, other PCIe slots, HDDs, ODDs, USB, etc, etc) while 2x 225W would leave 75W for the rest of your computer (which seem way to small a power budget when a CPU can suck ~80W-130W by itself) :emotion-10:.

A x16 PCIe graphics slot can feed 75W to the card itself while the graphics card PEG connector(s) (the power connector on the graphics card) must provide the rest of the graphics card power needs. A 2x3 PEG connector can provide a further 75W while a 2x4 PEG connector can provide a further 150W. There can be more than 1 PEG per card allowing a total (with the PCIe slot) of either 150W, 225W or 300W per card depending on the version of the PCIe electomechanical spec the card was designed towards. In this context, and being a 150W card, i would have expected your Dell power supply to provide 2 2x3 PEG connectors, one for each graphics cards so you can actually get a full 150W per card. Again, if indeed you can SLI/CrossFire consumer cards on this motherboard ! From what i have seen on the web, your Zotac GTX 260 has 2 2x3 PEG connectors and would consume 225W so you will likely not have any left over PEG connectors for a second card.

If Dell won't sell you 2x consumer graphics cards for your system, then your going to have to do some more digging yourself but if consumer grade graphics SLI/CF is not supported, it's an uphill battle. And Dell doesn't like to help with technical information, they just want to sell and get their cut :emotion-6:

So the more specific question should be:
Can i SLI/CrossFire consumer graphics cards on my T3500?
Should the Dell 525W PSU for the T3500 provide two 2x3 PEG connectors for use with SLI/CrossFire graphics cards?
Does a 675W PSU exist for the T3500 and does it have 2 2x4 or 4 2x3 PEG connectors?
Does the T3500 Dell PSU use proprietery pinouts or can a standard PSU be purchased?

Good luck and let the forum know how you went with this..

I have a T3500 and intend on subbing in a T7500 1100w PSU and instead of the standard T7500 harness or the T3500 harness the system came with I will be installing a Alienware Area-51 ALX harness that has the extra PCIe connectors but doesn't have the "CPU2" connector I don't need anyway. The 1100w power supply for the T7500 is the same one on the Alienware the only difference being the harness from what I can tell.

That way I can run two GTX Titans on the T3500 and crunch more effectively.

WA

Hello, would a power supply from a T5500 (W299G, 875 watts) fit the modular plug in the T3500?  I am having a similar issue.  Is the modular plug in the wiring harness the same for T3500/T5500/T7500?

Same question, anyone on dell can ans it pls

Crossfire works SLI Does NOT.

my question is can i user psu T5500 for T3500

sr because did't write down clearly 

The W299G 875w POWER supply works and fits but I do not know if the square wiring blocks are identical or not.

So if you get one I would make sure it comes with the wiring harness.