PSU for 2x 9800 GTX (TX750?)

Urban Reflex · Post by **Urban Reflex** » Wed Mar 19, 2008 11:12 am

Yes, you read that correctly. A while ago I posted a thread on the System Advice board, about a new build. I'll update that thread later when it's all working, but here is my current specsheet:

Asus Striker II Extreme (790i)
Intel Core 2 Duo E8400
OCZ 2x1GB DDR3 1333Mhz (to be upgraded when the real DDR3 is out and reasonably priced)
150GB WD Raptor
500GB WD Caviar SE16
LG BluRay / HDDVD drive

For graphics, I'm going to go with either 9600 GT in SLI, or get a 9800 GTX if price and performance hit the sweet spot. The plan will be to SLI the GTX when it becomes appropriate to do so, so I want to get a PSU that'll handle that now.

Now, I know, I know, "Silent PC Review, two 9800 GTX, heat, sound, crazy man", is what you're thinking. But this is what I want to do, and I want to make it as quiet as I can. More than likely I'll see about changing the GPU cooling to something quieter later on.

But for now, back to the subject, and PSUs. I wanted a HX620 but it's only got two 8-pin PCIE connectors. I'm going to need four. The TX750 fits the bill, but it's not a Seasonic. It looks like a good, solid PSU, but does anyone here own one? Or can you guys recommend something that's quiet and will fit the bill?

Khrono Devil · Post by **Khrono Devil** » Thu Mar 20, 2008 2:05 am

9800GTX looks to just be a 8800GTS with 2x SLi connector and higher memory clocks. If the 9800GTX keeps the same price premium than the G80 8800GTX still carries price/performance it won't be worth it unless you are going 3 way SLi.

I would recommend G92 8800GT/GTS ( or 9800GX2 but for now you can't fit after market coolers 'cause there are none ) this is what is out now. We don't know enough about the 9800GTX, all we know is that it supports 3 way SLi, we don't know if it will be 2x 6pin, 1x 8 pin, 1x 6pin.

As for the 8pin PCI-E connector you would only need 2 6pin for 8800GT/9600GT SLi. The 620HX can power a Q6600 + G80 8800GTX SLi setup.

Also have you purchased the Mobo/Ram?

Celoth · Post by **Celoth** » Thu Mar 20, 2008 3:31 am

The TX750 isn't as quiet as the Seasonic built ones. The new Modu82+ 625W should be able to power the 9800GTX in SLI just fine, unless you start doing a massive volt-modded overclock, then I dunno. It's powered by 2x 6 pin PCIE btw.

Urban Reflex · Post by **Urban Reflex** » Thu Mar 20, 2008 8:52 am

I've not purchased the RAM or motherboard yet, and I know you're probably thinking DDR3 is a bad buy. That's why I'm getting cheap stuff to begin with and then replacing it with better stuff down the line. I could wait to buy the whole thing later, but I've already been waiting 3+ years (long story) for a new computer.

I'm hoping the 9800 GTX is going to impress me enough to warrant the purchase. I'd buy a GX2 if they were reasonably priced (a lot faster than people thought they would be but not worth Â£400+). I might have another look at 8800 GTS cards but really I won't be able to make a concrete decision until the 9800 GTX is out and reviewed.

Basically the whole four 8pin requirement is a future proofing thing. I just want the capability there for if/when I want to use it. The Modu82+ would be perfect but it's only got two 8pin PCIE connectors.