Nvidia gtx 260 PSU +12V Amp requirement

I have a question related to the PSU required by nvidia gtx 260. Reading multiple websites shows that the gtx 260 uses 270 W. Calculating the amps required 270/12 = 22.5 A. If the card only uses 22.5 A when under load why does it say on the manual that it needs a psu with 36 A on the +12 ? 1 HDD usually uses 1A.

If I am correct, a good psu with 38A on the 12V should be plenty for 2 HDD, 1 DVDRW and a gtx 260, right?

the gtx 260 uses i believe around 182w at peak. u would be fine using a good quality 400-450w psu with about 27-30amp to be safe. im pushing my psu to its limit so if u do sli gtx 260 later on i would recommend a really good psu 550-600w with about 36-40amp.
(btw ppl telling u need like 800-1000w r just simply retards)

I have a case with a built in unbranded 600 watt psu which i was told was probably not powerful enough for even an 8800gt, the reason being just because it was a relatively high wattage the rails may not have the necessary current and it could damage my pc. In this case would it not be powerful enough for a 260? ALso if I were to try it could it serioulsy damage my pc?

I have a Cooler Master Real Power Pro 750w with 4 12V rails each at 19A. Would that be enough to power a GTX 260? I'm basing my thinking on being able to connect the 2 6-pin connectors from different rails, then the total amps would be 38A, more than enough right?

Look up any power comparison chart that lists an 8800GT or 9800GT. Take that chart's idle consumption and subtract 2.5A x 12v (30 watts), that is the PC's overall power consumption without the graphics card.

Now that you know what the rest of the system consumes at idle, take the load reading they had and subtract 6A (the max I've ever seen my 8800GT go) x 12v (72w), that is the PC's overall power consumption at load without the graphics card.

Now assuming the hardware is identical except for the video cards, you can figure out how much that GTX 260 uses. If you cant find a benchmark featuring both an 8800GT AND your chosen card, then things get a bit more complicated. Find some common ground, the 260 is almost always compared to a 9800GTX, so compare the 8800GT to that 9800GTX, then the 9800GTX to the GTX 260. Toms hardware claims ~15A for the 260, but then again somehow their 1GB 8800GT draws less power than the 512MB version... significantly less. My 8800GT 512MB uses slightly lower power at stock clocks than their tested 1GB model.

Overclocking is a different story though, at 740/1840/980 (core/shad/mem) my Zotac (non-amp edition) 8800 runs around 3.2A idle and 7.6A under load. Thats at stock voltage too, so I'm curious as to what the 1.1v mod will do or 1.15v

That xbitlabs image looks pretty close though as the 9800GTX is just an 8800GT(S) with higher clocks and extra voltage. The GTX+ would likely come pretty close to the GT.

Is it ENERMAX 500watt ... http://www.cluboverclocker.com/rev [...] /index.htm
enough for one GTX260-280 ?

Thank you..
Do I only have to change a cards 7900GTX to GTX 260 or to pluge some extra cables in it?

I have the same issue with my Seasonic ss-500ht.

Core i7 920
Sparkle Geforce GTX 260 216
Asus P6T Deluxe v2
Kingston 6GB (forgot the type of mem)


In windows mode (2D) erverything works fine.
But when I start Crysis the game wil run for 30sec. and the game crashes.
Tested serveral games but they all seem to do the same thing.

I think the psu is not sufficient but i'm nont realy sure.

The sticker says 12v 17A 12v2 16A zo that leaves me with 32A which is probably not enough for the card when it is in full load.

Can anyone tell me if this power supply is good enough for theses spec?

Amviewer

um invisik my cooler master power supply says it has 29 amps over the two 12 volt rails it also says that maximum wattage over the 12v and 12v2 rail shall not exceed 384 watts which equals 29 amps, sorta redundant but just felt i need to say it, 7 month old power supply will i be able to run a gtx260?

ok here is the problem I am having. I keep getting crashes when tring to run 2X GTX 260 in SLI mode. If i does not crash when i enable it, it crashes later when runing a game. The error message says basically the Nvidia driver kernal has stop responding. I am using the 185.85 drivers on Windows 7 RC (64 bit)

other Specs:
CPU: Phenom II 940 @ 3000
8 gigs kingston hyper z @ 1066
2 BFG GTX 260

ASUS crosshair Formula II 780a Motherboard

I know there has been a lot confusion about what the power requirements are for running these cards but here is what i have
Coolmax CUD 950
http://www.newegg.com/Product/Prod [...] 6817159072
I am fairly sure that is not what is causing the error. Any way if anyone has a suggestions please post.

Ken, im having the same problem, with 1 gtx 260 and an antec 500w earthwatts.
Im also using 185.85 but on vista 64bit.
I have decided that maybe my PSU is overheating.
Most people think that its their card. My card never gets above 72C so it's not that.
Also my PSU has solid voltages, I used a multimeter and the 12v never got below 11.82 (that was when the card was OCd and playing Crysis).
I can't even play games at this point in time because i know itll just shutdown.

What people dont think of is that many psu's dont operate well at all, above 50c.
Most of em shutdown.
I think thats what might be happening to mine, and im really hoping for some help here.

I apologize for the late response i must of missed your post. To answer your question yes it will work.

Antec true power 550w sli. 3 riels of 18amp each, total amp 42amp for my slt of gtx260 192 sp..

other components:

2 HDD
12 fans (12mm)
cold cathodes (not always on)
1 pump
corsair dominator for the rams

everything was ok untill this week, im getting ramdom crash when i play.. i decided to remove 1 of my babys..

should i put it back ? i will be dangerous to burn all my system ?

btw, my psu is almost 1 year old..

ps. before my gtx i have two 9600gt in sli without problems..