GX2 Power supply requirements

D

DaConfusion

Limp Gawd
Joined
Dec 14, 2005
Messages
212
Thermaltake 650W, from what I am reading, it will not be adequate. I am running q6600. This step up with little gain is starting to seem really pointless. I am already spending 150 to step up, might cancel it...

Thanks for the help!
 
Oh ok I am looking for one single GX2.

I thought I read 580 was nvida recommended. I am not upgrading my power supply unless this thing takes my 8800GTX and spanks it left and right!
 
i have the corsair TX750. it isn't listed on evga's site, but it has 4 6-pin PCI-E plugs with the little 2-pin add on to make it the 8pin..that should work, right?

pci-e_6_2-pin.jpg
 
Well if they made 8800 GTX SLI work with BeQuiet Straight Power 450W..then I think that Thermaltake 650W should be enough for single 9800 GX2.

Those recommendations are made for those "Ping Pong"-quality PSUs..and last time I checked Thermaltake weren't one of those. For example 8800 GTS 640MB had 450W PSU recommendation, but it worked fine with many years old Fortron 350W.
 
I plan on picking up the 750TX to run quad SLI. The 520hx is more than adequate for a single GX2, but only has 2 pci-e connections, so it wont run 2 cards. I currently run SLI GTS512's and a q6600 at 3.6ghz on a 520hx with no issues.
 
So has anyone tried a 6-8 pin adapter? I'm getting nervous. I have an original PC Power and Cooling Silencer 750 that only has 6 pin connectors. I'm hoping it works fine with the adapter! :eek:
 
I wouldn't hesitate to use the adapter, you should be fine.
 
The problem with using a 6 pin to 8 pin adapter is you are going to be trying to power your card with only 6 lines of power, supposed to be 75 watts, (6 pin). The 8 pin connectors from the way I understand it require 150 watts, see the problem with using an adapter ????? :confused:
 
I was actually in the process of "stepping up" my 8800 to the GX2 on eVGA's site when I learned of this 6-pin to 8-pin issue. After some research, it seems opinions are fairly split over whether it's perfectly okay to use an adapter OR get a new PSU that has an 8-pin connection. The latter would be a deal-breaker for me. I'm not going to drop another $150-ish for a new PSU in addition to the $250 I'd spend upgrading to the GX2.
 
Bare in mind that Nvidia is saying that this card consumes around 197W. This means that your GX2 would need like 17A from one 12V rail.

This means that for example BeQuiet Straight Power 450W should have easy job with single GX2 (12V1 25A, 12V2 18A)

Corsair HX620 or TX650 would be more than enough for 2x9800 GX2.
 
I just got an e-mail from eVGA tech support saying the HX620 is plenty powerful for the 9800GX2. Good enough for me. Now, to find the right 6-pin to 8-pin adapter. Any suggestions?
 
Thanks! the only problem i have with corsairs website, it says my HX620 has 2x8 pin PCI-E but i think it really has 2x6 pin? i havent looked in a while to see a 8pin pci-e

any confirmation on this? thank you! :)
 
The thermaltake doesn't stand much of a chance.

For a single 9800GX2 you'd need at least a Gen4 VHTR, apparently these guys are selling em pretty cheap these days (I think they mentioned a bankruptcy clearance sale?). For two 9800GX2s, I would consider an upgrade to a RFNPS. You can get em for about $120(,000,000,000)

:cool:

no, in all seriousness, a 650W TT Toughpower will run one just fine, you could probably get away with two even, but that'd be pushing it.
 
iRoNeTiK said:
Thanks! the only problem i have with corsairs website, it says my HX620 has 2x8 pin PCI-E but i think it really has 2x6 pin? i havent looked in a while to see a 8pin pci-e

any confirmation on this? thank you! :)
Click to expand...
Yeah, our HX620s have the 2x6 pin
, at least according to the spec sheet I'm looking at right now. .
 
iRoNeTiK said:
Thanks! the only problem i have with corsairs website, it says my HX620 has 2x8 pin PCI-E but i think it really has 2x6 pin? i havent looked in a while to see a 8pin pci-e

any confirmation on this? thank you! :)
Click to expand...

They originally shipped with 2x6. It was updated later to 2x8. All you have to do is email them and request the 8 pin cables. They will send them free of charge. Poke around on their forums in the Power Supply section for the info.

That's one of the benefits to using a modular supply.
 
Thanks man! Yeah I got mine when they first came out :) Yes, modular rocks haha
 
Send an e-mail to: Ramguy@corsairmemory.com and type ATT: RAMGUY in the subject line. In the body of your message, give your name, address, phone number and request the [FONT=&quot]single 6-pin PCIe & 6+2-pin PCIe cable. I just sent my request. :D [/FONT]
 
GreenGoose said:
So has anyone tried a 6-8 pin adapter? I'm getting nervous. I have an original PC Power and Cooling Silencer 750 that only has 6 pin connectors. I'm hoping it works fine with the adapter! :eek:
Click to expand...

im in the same boat.. but i ordered a 6-8 pin converter from pcpc so ill let you know! :p
 
Niceone said:
Bare in mind that Nvidia is saying that this card consumes around 197W. This means that your GX2 would need like 17A from one 12V rail.

This means that for example BeQuiet Straight Power 450W should have easy job with single GX2 (12V1 25A, 12V2 18A)

Corsair HX620 or TX650 would be more than enough for 2x9800 GX2.
Click to expand...

Yes, only at stock settings. What about 2 oced 9800GX2?

Mr. Wolf said:
I just got an e-mail from eVGA tech support saying the HX620 is plenty powerful for the 9800GX2. Good enough for me. Now, to find the right 6-pin to 8-pin adapter. Any suggestions?
Click to expand...

Don't the old HX620 have 6+2=8 pins? Mine has.

iRoNeTiK said:
Thanks! the only problem i have with corsairs website, it says my HX620 has 2x8 pin PCI-E but i think it really has 2x6 pin? i havent looked in a while to see a 8pin pci-e

any confirmation on this? thank you! :)
Click to expand...

smithkt said:
They originally shipped with 2x6. It was updated later to 2x8. All you have to do is email them and request the 8 pin cables. They will send them free of charge. Poke around on their forums in the Power Supply section for the info.

That's one of the benefits to using a modular supply.
Click to expand...

That answers it.

Mr. Wolf said:
Send an e-mail to: Ramguy@corsairmemory.com and type ATT: RAMGUY in the subject line. In the body of your message, give your name, address, phone number and request the [FONT=&quot]single 6-pin PCIe & 6+2-pin PCIe cable. I just sent my request. :D [/FONT]
Click to expand...

You mean 6+2 is the new one?
 
Eeeek, I hope my newly purchased Enermax Liberty 620W is capable of running a single 9800 GX2, can anyone confirm this? Thanks!
 
Ahhh, screw it... I just ordered a Thermaltake Toughpower 750W. I don't want to worry about any fire hazard or warranty voiding ssues by using a adapter. I dug out an unused AMEX $200 gift certificate that I was going to use toward my new 30" LCD. The TT 750W has received a lot of praise plus it's got a built-in 8-pin connector so there's no need for an adapter (see pic below).

BTW, my place in eVGA's "step up" queue went from 389 to 187 in less than 24 hours. :D

.
 
Kangg said:
The problem with using a 6 pin to 8 pin adapter is you are going to be trying to power your card with only 6 lines of power, supposed to be 75 watts, (6 pin). The 8 pin connectors from the way I understand it require 150 watts, see the problem with using an adapter ????? :confused:
Click to expand...
BFG 9800GX2 comes with 6 to 8 pins PCI-E converter and it ran w/out any power problem.
 
I ran my 9800GX2 for about ten hours total gaming with the 6-8 pin adapter on a PC Power Cooling Silencer 750 without any problems. :D

I'm not sure what "issues" EVGA is talking about.
 
I have the Silverstone ST85ZF psu with 4 x 6pin would this be OK to use on the 9800GX2
with an 6 x 8 adapter.
My setup would look like this:

Asus P5E3 Premium

DDR 3 4gb

Auzentech 7.1 sound card

9450 cpu

3 x hard drives

2 x burners

1 x 9800GX2 or 9800GTX or wait for the 10 series
 
I spent some of my Saturday researching this 6-8 pin adapter issue and it boils down to this:

"The 6-pin provides about 75 watts while the 8-pin does around 115 which means when you use the adapter it has to be rated at 115+ and cannot have any flaws. Also, many power supplies that have a 6-pin may not still have enough amps or watts to power that much of a videocard. The biggest thing is that most of those adapters are not UL certified to draw that kind of power and could short/spark, etc."

This still doesn't explain why eVGA and XFX discourage the adapter while BFG ships their GX2 with the adapter. Maybe the BFG adapter is UL certified?
 
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