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gpu power consumption ?

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a b U Graphics card
July 22, 2008 4:28:21 PM

hey guys just wondering would a oc 9800gx2 consume the same power as 2 gtx 260 in sli in stock?
the 9800gx2 is oc @ 740/1125 its like 2 9800gtx decently oc would the power consumption be equal? (the 9800gtx uses about 35-50 less then the gtx 260 i believe)

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July 22, 2008 4:56:35 PM

I really doubt that the GX2 could consume as much power as 2 260 GTX in sli, even if it were oCed.

As for 2 9800 GTX oc, I think those would be slightly higher than the 9800 GX2, since its 2 cards.

your best bet would have to be to search for oced versions of the 9800 GX2 and or 9800 GTXs and compare power consumption:) 
a b U Graphics card
July 22, 2008 5:03:59 PM

well i was planning to get 2 gtx 260 because 1 of the dvi port is defected on my gx2 so newegg is letting me return it, so i was gonna pick 2 gtx 260 up but im worried about my psu. i have an antec earthwatt 500 and it ran my q6600 oc @ 3.0ghz and my 9800gx2 oc @ 740/1125 just fine so i dont no if it will run 2 gtx 260. from reviews the 9800gtx is about 40wat less then the gtx 260 and since the gx2 is pretty much 2 9800gtx im assuming the power difference will be about 80wats and since my gx2 was oc its probably less of a difference in power usage. to sum it up do u think 2 gtx 260 would work with my psu?
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July 22, 2008 5:17:06 PM

^The EA500 is a great PSU but it will not power two GTX260s.
July 22, 2008 5:23:33 PM

4870X2 uses most power right now and it produces the most heat too among any other cards on this planet today
a c 192 U Graphics card
July 22, 2008 5:31:56 PM

The minimum may be somewhat less, but especially since you are planning to oc, you probably want a quality PSU in the 650W range to have some margin. The PSU calculator at http://www.extreme.outervision.com/PSUEngine suggests that system will use only 468W, but that's before the GPU overclock, and makes assumptions about the rest of your system that may not be valid. That's 75% of 624W, making a 650W PSU a comfortable size.
July 22, 2008 5:43:15 PM

http://www.atomicmpc.com.au/forums.asp?s=2&c=7&t=9354&p...

No specific SLI test for the 260, but approx 300W.
9800GX2 looks like under 200W.

Unfortunately, neither Tom's nor Anandtech tested consumption of 260SLI.
http://www.tomshardware.com/reviews/nvidia-gtx-280,1953...
http://www.anandtech.com/video/showdoc.aspx?i=3341&p=22
http://www.anandtech.com/video/showdoc.aspx?i=3334&p=9

Guesswork puts the power consumption around 450W or so, which is a lot of power, and doesn't leave much wiggle room for a 500W power supply (even a good one). You'd probably want a good 600W PSU at least.

4870X2 uses most power right now and it produces the most heat too among any other cards on this planet today

Off topic, and would you like to cite a source? And by basic steady state approximation, power draw = heat consumption. Perhaps you are confusing temperature and heat output?
a b U Graphics card
July 22, 2008 6:02:41 PM

ya i thought i would need a new one but the only problem is cash at the moment if i buy 2 gtx 260 im kinda at my max budget adding a new psu would be like $60+ and shipping on top of that. i have another psu which is a 530watt is there a way i can use 2 psu? i believe there was a connector for that. newegg have them?
a b U Graphics card
July 22, 2008 6:36:49 PM

thanks but im not good with these type of things dont like risking it. theres no adapter were u can plug in 2 psu connectors onto mobo.
a b U Graphics card
July 22, 2008 7:51:48 PM

hey guys how accurate is eXtreme Power Supply Calculator Lite v2.5
it says sli 9800gtx+ and sli gtx 260 use the same amount of power true or false?
a b U Graphics card
July 22, 2008 7:59:53 PM

I doubt it. The 9800GTX+ is fairly aggressively clocked, but it is still a die shrink of the G92, an extremely low power (by Nvidia's recent standards) part, while the GT200 is huge and power hungry.
July 22, 2008 8:02:49 PM

invisik said:
hey guys how accurate is eXtreme Power Supply Calculator Lite v2.5
it says sli 9800gtx+ and sli gtx 260 use the same amount of power true or false?

It's usually at least ball park accurate, but not in that case. The GTX260 consumes a good bit more power than the 9800GTX+, especially if you overclock it (which you should).
July 22, 2008 8:21:32 PM

Get a gtx 280 instead. You will get about the same performance with the two cards in sli as the one card anyway. For less total price. And your psu would work fine.
a b U Graphics card
July 22, 2008 8:25:53 PM

A GTX 280 is quite a bit slower than a pair of 260's.
July 22, 2008 8:48:26 PM

mothergoose said:
Get a gtx 280 instead. You will get about the same performance with the two cards in sli as the one card anyway. For less total price. And your psu would work fine.

Although your claim is inaccurate, you bring up a good point. A single GTX280 will be fast enough* for just about any application I can think of. Why deal with all of SLI's inherent problems when a single GTX280 is fast enough*?

*Assuming invisik doesn't have a 30" LCD
a b U Graphics card
July 22, 2008 8:55:26 PM

well currently i have a 9800gx2 but the dvi port has gone bad so newegg is letting me return it and im gonna purchase a new card. i play games at 1680x1050 and my budget is around 500$ i was thinking of getting 2 9800gtx+ (no ati cards since i have an sli board) trying to find something better then my previous 9800gx2.
im trying to avoid the gtx 280 because it cost a little more and in benchmarks it performances on with 9800gx2 where the 9800gtx in sli beat the 9800gx2 in a few fps and the new 9800gtx+ probably scores a few more fps on top of that and oc well past 800mhz.
July 22, 2008 9:06:32 PM

invisik said:
well currently i have a 9800gx2 but the dvi port has gone bad so newegg is letting me return it and im gonna purchase a new card. i play games at 1680x1050 and my budget is around 500$ i was thinking of getting 2 9800gtx+ (no ati cards since i have an sli board) trying to find something better then my previous 9800gx2.
Thanks

Well then I think this might be the only GTX280 recommendation I've ever given. You can even score a nice factory oc'd eVGA model on Newegg for $499 ($469 AR), although to be honest I think you would be wiser to save $50 with a stock model and overclock yourself if you want to. And yes I'm an eVGA fan :D 

Of course, I would also tell you that at 1680x1050 a single HD4870 would be more than fast enough, and cheaper to boot.
a b U Graphics card
July 22, 2008 10:40:37 PM

so would i get better performance out of gtx 280 then 2 9800gtx+?
a b U Graphics card
July 22, 2008 10:41:42 PM

Probably not, no.
a b U Graphics card
July 22, 2008 11:09:21 PM

ok so wat do u guys recommend 2 9800gtx, gtx 280, 9800gx2 price isnt an issue because there all around the same 400-500 range.
July 23, 2008 1:01:34 AM

invisik said:
so would i get better performance out of gtx 280 then 2 9800gtx+?

Depends on the game, but most of the time the 9800GTX+s will deliver higher average framerates. I could give a toot about average framerates, it's all about the minimums baby, and that's where single GPUs shine :sol: 
a b U Graphics card
July 23, 2008 1:31:23 AM

i guess ill just get the 9800gtx+ thanks for all ur help.
July 23, 2008 4:55:41 AM

homerdog said:
Although your claim is inaccurate, you bring up a good point. A single GTX280 will be fast enough* for just about any application I can think of. Why deal with all of SLI's inherent problems when a single GTX280 is fast enough*?
*Assuming invisik doesn't have a 30" LCD


Should have done my research before posting... but I stand by that. If you get a gtx 280 now you will be able to play any game (except crysis), max settings, with some AA to boot (for most anyway). Then you can always upgrade your power supply and get another card when you feel the need to upgrade again. Although, a 4870 has pretty much the same relative performance and is still much cheaper.

http://www.tomshardware.com/reviews/radeon-hd-4870,1964...
a b U Graphics card
July 23, 2008 6:34:22 PM

ahh so confused now. i have friends telling me 2 9800gtx+ well outperform the gtx 280 by a good amount and others telling me the gtx 280 is better. grrr lol
a b U Graphics card
July 23, 2008 6:39:51 PM

A pair of 9800 GTX+ will outperform a single GTX 280. The main advantage of the 280 is SLI capability, as well as the extra memory for high res with filters (1920x1200 and up, 4xAA and up)
a b U Graphics card
July 23, 2008 6:47:44 PM

i only game at 1680x1050 so would there me any point for more memory?
a b U Graphics card
July 23, 2008 6:49:10 PM

Not really, no. At least not with any game out right now.
July 23, 2008 6:51:12 PM

invisik said:
ahh so confused now. i have friends telling me 2 9800gtx+ well outperform the gtx 280 by a good amount and others telling me the gtx 280 is better. grrr lol

Your friend is right, the two GTX+s will generally outperform a single GTX280 in average framerates as long as the game in question is AFR friendly and not framebuffer limited. Thing is, the GTX280 is 'fast enough' and doesn't have these limitations. Consistency is key, and for consistent performance you can't beat a single GPU.
a b U Graphics card
July 23, 2008 7:03:37 PM

alright so ill hold off for like a wk if the gtx 280 price drops a lil ill pick it up. i heard the 4870x2 was coming out soon any info?
a b U Graphics card
July 23, 2008 7:14:39 PM

cant you just get a 4850 or 4870?
the 4850=9800GTX+
the 4870 is between the GTX260 and GTX280 in most cases.
a b U Graphics card
July 23, 2008 7:15:45 PM

nope i got an sli board. =[
July 23, 2008 8:02:59 PM

invisik said:
nope i got an sli board. =[

...I can see why you want to stick with NVIDIA for future SLI action, but you do realize you could get a 4870 if you wanted to, right? I mean it's not like you can't do it...
a b U Graphics card
July 24, 2008 1:09:52 AM

ya i no but when i want more performance down the road i can just add another nvidia card. but ya can u answer this ? for me. i asked this in the memory thread but not many ppl r there.

hey guys i was just wonder, currently i have a 9800gx2 in my system and 4 gigs http://en.wikipedia.org/wiki/Gig of ram. my pc sees and only uses 2gigs. later i found out i needed a bios update ( bios problem) so after i did that my pc used 3gigs instead of 2 and the other gig cant be used because my gpu http://en.wikipedia.org/wiki/Graphics_processing_unit is using 1gig so =4gig. i noticed since my pc now uses 3gigs my fps in my games increased from like 30 to 40fps. im upgrading my gpu and im getting 2 gtx GeForce 9 Series 260 which use 896x2 of memory = 1792mb. now my pc will only use 2.2 gigs of ram will this cuz my system to perform worse because the amount of ram went down from 3 to 2.2gig. ( remember when my pc went from 2 to 3gig a huge improvement was made on games)
Thanks.
July 24, 2008 1:27:03 AM

Eh, don't worry about the RAM. Whatever you end up with it'll be plenty. It's a complicated issue, you can read about it here if you want, but ultimately you'll need a 64 bit OS to see the full 4GB. SLI doesn't increase the address space needed since the cards hold duplicate framebuffers.
a b U Graphics card
July 24, 2008 1:35:03 AM

kk but does dedicated video memory count for the 4gig limit with 32bit os.
like if my graphic card had lets say 3gigs of memory i would be limited, my pc will be limited to see 1gig of ram because 3gig is addressed for my graphic card. right?
July 24, 2008 6:19:04 AM

invisik said:
kk but does dedicated video memory count for the 4gig limit with 32bit os.
like if my graphic card had lets say 3gigs of memory i would be limited, my pc will be limited to see 1gig of ram because 3gig is addressed for my graphic card. right?


No, the memory is onboard the card. Only integrated graphics chipset like intel extreme and some others borrow from your systems physical memory.
a b U Graphics card
July 24, 2008 6:25:27 AM

mothergoose said:
No, the memory is onboard the card. Only integrated graphics chipset like intel extreme and some others borrow from your systems physical memory.

Graphics memory does count against the 4gb limit though. It may be onboard the card, but the OS still needs to address it. That's why even though it's a 4GB limit in 32 bit systems, you actually hit the wall at more like 3.2 gigs.
July 24, 2008 11:48:42 AM

mothergoose said:
No, the memory is onboard the card. Only integrated graphics chipset like intel extreme and some others borrow from your systems physical memory.

Wrong. Not the part about the memory being on the card, but everything else, including your supposition that video memory does not require address space (how would that work :??:  ).
cjl said:
Graphics memory does count against the 4gb limit though. It may be onboard the card, but the OS still needs to address it. That's why even though it's a 4GB limit in 32 bit systems, you actually hit the wall at more like 3.2 gigs.

Right.

But it isn't always so simple. Two cards in SLI don't require double the address space of a single card. Also, Vista throws a wrench into the whole thing by virtualizing video memory. As I said earlier, don't worry about the RAM, whatever you end up with will be enough.
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