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Nvidia 9800GX2 Power Requirements

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January 16, 2008 9:40:44 PM

It's been floating around that the GX2 card releasing next month will have a minimum requirement of 580W. This seems a little rediculous to me, but since it is 2xGPU's in one I suppose it's possible. Does this mean you should be getting AT LEAST a 700W PSU if planning to buy this?
January 16, 2008 11:13:08 PM

580 watts with 40 amps. You can get a toughpower 650 that puts out 72 amps so I wouldn't say you have to jump right up to 700. Now the bit I don't believe is the $450 price tag. With 30-50% more performance than a $650 ultra? Some how I doubt they're just suddenly going to go "oh yeah, and lets stop screwing them with the prices"
January 16, 2008 11:28:32 PM

LAN_deRf_HA said:
580 watts with 40 amps. You can get a toughpower 650 that puts out 72 amps so I wouldn't say you have to jump right up to 700. Now the bit I don't believe is the $450 price tag. With 30-50% more performance than a $650 ultra? Some how I doubt they're just suddenly going to go "oh yeah, and lets stop screwing them with the prices"



With you on that. I wanna see the true price range of the card. Where did you pick up the info about the power req?
Related resources
January 16, 2008 11:41:52 PM

One thing is for sure, you'll need an 8pin + 6pin PCI-E connector for the power requirements rather then just 2 x 6pin PCI-E connectors. My PSU has 1 8Pin + three 6Pin PCI-E power connectors, my PSU (Enermax Infiniti 720W PSU) can handle only one graphics card that uses the full bandwidth of PCI-E 2.0.
January 17, 2008 12:49:55 AM

I saw it on xtreview. I doubt it will use the 8 pin. From what I can tell its based on the 512 gts, which uses one 6 pin. So it will most likely be 2 6 pins.
a b U Graphics card
January 17, 2008 2:29:10 AM

My Zalman 600 Watt puts out 42A on the 4 12V rails, it also has two 6 pin connectors, does everybody think that will suffice for the new 9800GX2 ??? I really dont want to buy a new one, it was very expensive, and has been a fantastic PS.
January 17, 2008 3:39:43 AM

LAN_deRf_HA said:
I saw it on xtreview. I doubt it will use the 8 pin. From what I can tell its based on the 512 gts, which uses one 6 pin. So it will most likely be 2 6 pins.



I wasn't guessing that the 9800GX2 will use the 8Pin + 6Pin connector, I am telling you that it has already been comfirmed that it will use one 8Pin and one 6Pin. Thats a fact.
January 17, 2008 3:43:33 AM

Why can't they use 2 6pin connector? Not enough power?

I believe PCIe 2.0 supplies more power than the old PCIe so perhaps one of the connector isn't necessary when running it on PCIe 2.0?
January 17, 2008 3:56:20 AM

Evilonigiri said:
Why can't they use 2 6pin connector? Not enough power?

I believe PCIe 2.0 supplies more power than the old PCIe so perhaps one of the connector isn't necessary when running it on PCIe 2.0?



The PCI-E 2.0 was updated more for the extra power draw that will be in use soon, as for the extra 16GB of bandwidth we are far away from using it anytime soon. The extra two wires added to the 8Pin PCI-E allows 150 watts compared to the 6Pins 75 watts of power. By this time next year all mobo's will all have PCI-E 2.0 slot, the X38, X48, 780i and the 790i already have the new PCI-E 2.0 spec. My power supply is DXX or PCI-Express 2.0 ready.

Enermax Infiniti 720W with one 8Pin connector

By systemlord at 2008-01-16

Galaxy DXX 850W with two 8Pin connectors

By systemlord at 2008-01-16
January 17, 2008 4:11:32 AM

I'm just thinkin if the card is going to take up like 580W and the processor another 60W, that's already 640W, and I was originally planning on getting a corsair 620HX modular.. but now it looks like the 750W corsair (non-modular) is my best bet, unless someone can recommend a nice modular PSU with long cables for the p182 above 650W.
January 17, 2008 5:08:30 AM

I was thinking that i wasnt going to need a 1000Watt psu in my new pc..... guess il have to see about the 3870X2.
January 17, 2008 5:52:16 AM

LAN_deRf_HA said:
580 watts with 40 amps. You can get a toughpower 650 that puts out 72 amps so I wouldn't say you have to jump right up to 700. Now the bit I don't believe is the $450 price tag. With 30-50% more performance than a $650 ultra? Some how I doubt they're just suddenly going to go "oh yeah, and lets stop screwing them with the prices"


I don't think it's a case of them having a change of heart, rather nVidia having to compete with the $400 price tag that AMD has said the hd3870 x2 will have.
January 17, 2008 6:11:02 AM

beurling said:
I'm just thinkin if the card is going to take up like 580W and the processor another 60W, that's already 640W, and I was originally planning on getting a corsair 620HX modular.. but now it looks like the 750W corsair (non-modular) is my best bet, unless someone can recommend a nice modular PSU with long cables for the p182 above 650W.


it doesnt go that way...it needs 580W in reserve to powerup but that doesnt mean its gonna consume 580w...hell its not gonna be half of that even, at full load.
the 8800 ultra consumes about 250-260watt at full load, and they said the upcoming GX2 will consume less power so you do that math m8.
i highly recommend thermaltake toughpower cablemanagement 750watt...you will never need to change it again and its quite cheap...110bucks or so...and gives 72A on the 12v which is awesome
January 17, 2008 6:16:26 AM

Price for the 9800 looks like it might be a bit high:

We've heard that Geforce 9800 GX2 dual G92 dual chip sandwich design will end up as expensive as 8800 Ultra, if not even more.
http://www.fudzilla.com/index.php?option=com_content&ta...

It's current as of January 14, 08. However it is Fudzilla so use your own judgment; it is better than nothing though.
January 17, 2008 7:09:04 AM

When Nvidia releases a MSRP then add 10% + the "gouging"
8800GT MSRP = $249
I paid $289 the 1st day of release. Alot of retailers ^
January 17, 2008 9:14:01 AM

Though I'll be getting two 3870's, they'll be for two separate PC's. So no Crossfire, but I still can't wait to see how the two x2 GPU cards will do in benchmarks, plus the power draw at load. The Nvidia card does look a bit larger. It will probably beat the ATI, but will be priced accordingly.

Even with AMD's 55nm and Nvidia's 65nm, we really need to see dual, plus future triple and quad core GPU's with lower power requirements. Whatever's at the high end, it's the $189 to $249 range for me. So bring on those medium settings in DX10 games! LOL

Right now, my Antec Neo 550 watt psu is looking a bit underpowered.
January 17, 2008 9:54:39 AM

beurling said:
I'm just thinkin if the card is going to take up like 580W and the processor another 60W, that's already 640W, and I was originally planning on getting a corsair 620HX modular.. but now it looks like the 750W corsair (non-modular) is my best bet, unless someone can recommend a nice modular PSU with long cables for the p182 above 650W.


Get the Enermax Infiniti 720W or the Galaxy 850W-1000W which has two 8Pin PCI-Express 2.0 and two 6Pin PCI-E 1.1 connectors.

Enermax 720W DXX ready PSU.

By systemlord at 2007-11-13


Enermax Galaxy DXX ready 850W-1000W

By systemlord at 2008-01-17
a b U Graphics card
a b Î Nvidia
January 17, 2008 10:18:39 AM

LAN_deRf_HA said:
You can get a toughpower 650 that puts out 72 amps


72a x 12v = 866w , I doubt you'll find a 650 watt psu that can do that.
You do not add the rail rating to come up with total amperage.
( with certain units, such as the Antec EA500, you can, it has two 17 amp rails that have 408 watts provided to them, 408w * 12v = 34a ).
a b U Graphics card
January 17, 2008 12:32:02 PM

And even maxing out the 12 volt power is unrealistic. According to my Antec 650 w TP3 box, it has three 19 amp 12 volt rails. (I'm not sure that's true, because I read continuity between any two 12 volt lines.) It also says total 12 volt power is 52 amps (624 watts). 26 watts aren't enough to run the rest of a computer.

The rumored 580 watts for the video card just doesn't pass the, "Does this make sense?" test. If I have my specs right, PCI 2.0 - 15 amps, 8 pin PCI-e connector - 15 amps, and PCI-e 6 pin connector - 7.5 amps for a total of 37.5 amps. That equals 450 watts. And if the card is usable in a PCI 1.0 slot, that drops the worst case power draw to 360 watts.

In that case, using an 8 pin PCI-e plug makes sense. Two 6 pin PCI-e plugs and a PCI 2.0 slot would have the same capacity as one 6 pin, one 8 pin, and a PCI 1.0 slot.

With all that in mind, 580 watts does seem like a reasonable estimate for total SYSTEM power consumption.

But then, I can prove Heaven is hotter than Hell also.
January 17, 2008 4:25:13 PM

I didn't think anyone was saying it needs 580watts just for itself.... but the math really doesn't seem to add up with these power requirements.
January 17, 2008 4:55:41 PM

I have the Enermax Galaxy DXX 1000w, It is a beast, be certain you have room.
I really can not stress enough how mammoth it is AND heavy... its really quite silly.

**with that said.. It is a kick as* power supply
January 17, 2008 7:55:35 PM

would the corsair hx620watt PSU be able to handle this card?

thinking of getting rid of my 8800GTX (in RMA to BFG after it didnt post) and getting this as it has an HDMI port
January 17, 2008 8:34:42 PM

kazuya kazama said:
would the corsair hx620watt PSU be able to handle this card?

thinking of getting rid of my 8800GTX (in RMA to BFG after it didnt post) and getting this as it has an HDMI port

I would think so
50amps
February 17, 2008 6:16:13 PM

The 9800 GX2 is basically 2 8800 GT's bolted together. As it would seem a single GX2 should consume what the 8800 GT's in SLi would. But because it only has a single PCI-E slot it needs an 8 pin + a 6pin to make up for not having the PCI-E bus power like 2x 8800 GT's would.
February 17, 2008 6:32:02 PM

I can only imagine how hot this thing is going to run. A person on this forum said his 7950GX2 ran at around 102c. That's enough to easily cook an egg. This thing will be horrible if they can't figure out how to control the heat, which is probably why they're taking forever to release it. They took the lazy way out instead of putting two GPUs on one PCB, like the X2 and I think it might be their folly with this card, which was the same problem with their old dual GPU design.

Also, if the requirement for an SLI capable motherboard is still required, it'd be a better idea to buy two 8800GTS G92s instead.
February 17, 2008 6:38:05 PM

Rawl13 said:
The 9800 GX2 is basically 2 8800 GT's bolted together. As it would seem a single GX2 should consume what the 8800 GT's in SLi would. But because it only has a single PCI-E slot it needs an 8 pin + a 6pin to make up for not having the PCI-E bus power like 2x 8800 GT's would.

Ding! We have a winner :D 

Technically if it was plugged into a PCIe2.0 slot it would only need either one 8 pin or two 6 pins, but I don't think Nvidia allows g92 cards to draw over 75W from the PCIe slot, regardless of whether or not it is 2.0 (which is capable of 150W).
February 17, 2008 6:57:01 PM

Rawl13 said:
The 9800 GX2 is basically 2 8800 GT's bolted together. As it would seem a single GX2 should consume what the 8800 GT's in SLi would. But because it only has a single PCI-E slot it needs an 8 pin + a 6pin to make up for not having the PCI-E bus power like 2x 8800 GT's would.

Try 2 8800GTS's
February 17, 2008 8:58:58 PM

Wrong.

For example, 7950GX2 compared to 2x 79GT/GTX cards was a power god as it only consumed like 30% more. There isn't 2 of everything.


This card will be awesome for water cooling though :D 


Also there are already options on boards to give even up to 200watts through the PCI-E2 slot.
February 17, 2008 9:42:04 PM

Hatman said:
Wrong.

For example, 7950GX2 compared to 2x 79GT/GTX cards was a power god as it only consumed like 30% more. There isn't 2 of everything.


This card will be awesome for water cooling though :D 


Also there are already options on boards to give even up to 200watts through the PCI-E2 slot.

Let me clarify:
this was stated:
The 9800 GX2 is basically 2 8800 GT's bolted together
I said:
Try 2 8800GTS's

What is incorrect?
February 17, 2008 9:56:05 PM

Hatman said:
Also there are already options on boards to give even up to 200watts through the PCI-E2 slot.

Ya, but the 8800GT and 512MB GTS are limited to drawing 75W from the slot. I think this is to ensure backwards compatibility with PCIe1.X boards. Maybe the GX2 will allow a full 150W from a 2.0 slot, but we have no reason to believe that is the case.
February 17, 2008 10:10:14 PM

The GX2 (from what I read) would need the 6 and 8 pin. It doesn't matter till it's released (to know for sure)
February 17, 2008 10:41:09 PM

Hatman said:
This card will be awesome for water cooling though :D 


How are you going to attach a waterblock to a card thats put together like a sandwitch on toasted bread? Theres no room for that, also you can't even sepperate the two PCB's. Having to watercool a graphics card because it runs too hot from the factory is absurd. Count me out if thats the case, not a best buy by a long shot! People will just get two 9800GTX's is this pans out to be true.
February 17, 2008 10:57:50 PM

systemlord said:
Thats way underpowered there spoonboy. :lol: 


if 8,212 MW is not enough, then forget it! :pt1cable: 
February 17, 2008 11:04:32 PM

FrozenGpu said:
if 8,212 MW is not enough, then forget it! :pt1cable: 


Can you imagine what a power surge would do to your computer, it would land on the moon. :lol: 
February 17, 2008 11:13:37 PM

The 9800X2 also has the special chip on the card which allows the single socket sli. So even for 2.0 express users its safe to have more power for it if it needs it.
But i have heard that the card system is downclocked and there for consumes less watts.
February 19, 2008 2:43:44 AM

systemlord said:
Can you imagine what a power surge would do to your computer, it would land on the moon. :lol: 


word! :lol: 
February 19, 2008 3:29:48 AM

yay said:
I was thinking that i wasnt going to need a 1000Watt psu in my new pc..... guess il have to see about the 3870X2.


AMD has a list of certified PSU's for single and Crossfire cards:

http://ati.amd.com/online/certifiedpsu/index.html

Since the Antec Neo 550 I bought last Sept didn't have a 6+2 PCIe for 8 pin power, I ordered an Antec Neo 650 with a 6 pin PCIe and a 6+2. That's one of the recommended PSU's for a single 3870x2.

The total system power for it was reported at Anandtech as 290 watts and at Tom's as 309 watts, so it's less power than that reported for the 9800gx2 in this thread. The Nvidia card's bound to be a bit faster too. Nvidia will be on top until ATI comes out with the 4870 in June.

Nordic Hardware said the 4870 will be 50% faster than the 3870. That's the range of a 3870x2. If I were you, I'd wait till June. The 4870's MSRP is $299 and the 4870x2 is $499. I paid $449 for my card. If I'd have known, I'd have waited, but now that I have it, I want to enjoy it and not send it back.

FrozenGpu said:
word! :lol: 


The word is Belkin, as in Belkin UPS. All PC's with expensive GPU's should have a UPS.


February 19, 2008 4:23:41 AM

yipsl said:
AMD has a list of certified PSU's for single and Crossfire cards:

http://ati.amd.com/online/certifiedpsu/index.html

Since the Antec Neo 550 I bought last Sept didn't have a 6+2 PCIe for 8 pin power, I ordered an Antec Neo 650 with a 6 pin PCIe and a 6+2. That's one of the recommended PSU's for a single 3870x2.

The total system power for it was reported at Anandtech as 290 watts and at Tom's as 309 watts, so it's less power than that reported for the 9800gx2 in this thread. The Nvidia card's bound to be a bit faster too. Nvidia will be on top until ATI comes out with the 4870 in June.

Nordic Hardware said the 4870 will be 50% faster than the 3870. That's the range of a 3870x2. If I were you, I'd wait till June. The 4870's MSRP is $299 and the 4870x2 is $499. I paid $449 for my card. If I'd have known, I'd have waited, but now that I have it, I want to enjoy it and not send it back.



The word is Belkin, as in Belkin UPS. All PC's with expensive GPU's should have a UPS.


Tom's has a sticky all you wanted to know about a UPS by SomeJoe777 7.
http://www.tomshardware.com/forum/248245-28-tomshardwar...
February 19, 2008 5:36:31 AM

The power draw from the 9800x2 seems ridiculous for 1 card, but for a sli configuration its pretty standard. The only problem is that it is no better then sli, it is infact worse(and sli has bad scaling to boot). 2 pcbs sandwiched together is a nono. You now have heating problems and the fact that it is underclocked doesn't help either. Oh yea, it requires a eight and six pin connecter when the regular 8800gts(g92) only requires a single six pin. Sorry but the 9800x2 looks like a let down to me. But on the other hand the 9800gtx looks very promising. I am very interested in that, single pcb, better cooling, better overclocking, very powerful single gpu etc.

Still, I would love to see how well the 9800x2 does. I know it will be powerful, but I imagine it to be very problematic as well.

Believe it!
February 19, 2008 9:35:26 AM

I won't believe anything until I see how it does for myself before I judge it.
March 6, 2008 10:21:27 AM

looks like I'm going to have to upgrade my PSU...
*calls the boss for more shifts in work next week*
March 6, 2008 10:59:07 AM

I said there was going to be an 8pin + a 6pin power connector, thats a fact.


By systemlord at 2008-03-04


By systemlord at 2008-03-04
March 7, 2008 4:32:59 AM

I hope people can see what Nvidia is doing with this thing. It is nice for those of us like me to be able to get the power of dual gpu's on a mobo that does not support sli, but waiting until ATI releases their new cards, or even waiting for Nvidia to release their REAL next gen cards is the only logical this to do. This card is just to feed Nvidia more money until that time comes later this year.

This just seems too power-hungry and rushed-to-market to be a wise purchase. ATI's dual gpu card is easily the better design in every sense of the matter. For $609, a 3870 X2 ($430 @ Newegg) and a 3870 ($179 @ Newegg) can be had. We won't know until this gets released, but I am pretty sure those 2 cards will kick this thing's ass.

I can't wait for the overheating blunders to come pouring in to the forums :lol: 
March 7, 2008 4:44:05 AM

beurling said:
It's been floating around that the GX2 card releasing next month will have a minimum requirement of 580W. This seems a little rediculous to me, but since it is 2xGPU's in one I suppose it's possible. Does this mean you should be getting AT LEAST a 700W PSU if planning to buy this?


That doesn't sound ridiculous. My 3870x2 needs a minimum of 550 watts with one six pin and one 8 pin PCIe power connectors. With these cards, you're basically getting SLI/Crossfire in one slot (though the 9800gx2's solution lacks elegance -- Nvidia could have done one PCB, why didn't they?).
March 7, 2008 5:29:00 AM

They might have not banked on ATI doing a dual gpu card. That would make sense. Their design was good enough before, so why change it? Their design is not completely bad, but when compared to ATI's design it is.

Nvidia was probably not expecting ATI to give them any competition. If that is what they were thinking, they were wrong.
a b U Graphics card
March 7, 2008 12:14:47 PM

Dam Nvidia, if I didn't have a 680i, I would be picking up the 3870X2, and another 3870 for CF. Dam you Nvidia.
!