Discussion in 'Graphics Cards' started by Mortster, May 3, 2007.
This, claimed, scan of the ATI quickstart guide found with the 2900XT states "A 750W or better power supply..."
This is utter madness, this can't be right can it ?
I think they got that wrong.....
It should be one 2x3 pin PCI express and one 2x4 pin PCI express
2x3 = 6 , 2x4 = 8.
I already posted on this , to recap. Even an overclocked dual C2D+2900XT isn't going to use more than 350W/30A@12V. A good 500W PSU will be fine for most people. Its just to cover the PSU manufacturers who quote peak power levels. Its aimed at the general user who probably doesn't know what a rail or amp means. A more interesting problem is an overclocked 2900XT is getting very close to the overcurrent limit for a single rail. If you have a PSU with very strict OCP limits and the manufacturer has stuck to the ATX spec. Then the cpu is on one rail the remainder is on the other, it could well trip out.
So take that with a pinch of salt, its just like Nvidia saying you need 500w minimum for GTS/GTX yet so many have them running on 480w, 430w and even 380w in some cases working 100% fine.
The problem is....Which PSU's under 600watts come with a 2x3 PCI express and a 2x4 PCI express plug....
I know my Enermax Infiniti 720W has two 2x3 PCI express and one 2x4 PCI express...but i don't know which lower power PSU's come with the 2x4 PCI express plugs..
It'll be down to adapters I suppose. This 2x3 pin lark is very confusing.
There is very little difference power wise between a 6 and 8 pin plug. The 8pin has to more commons, no extra 12v. Its only a slight 25w rating increase. Not actual power.
It does not require a 750W PSU !
It consumes 200W a maximum of 200W at stock speeds.
Nice, 200w is low though no?
I suppose theyre predicting the power usage of every other component in the sytem...assuming everyones on 8 cored cpu's and what not by the time its released =P /joke
But you need a 2x3 pin and 2x8 pin for overclocking...and most smaller PSU's don't come with a 2x8pin.....
So the Card no good if we can't overclock it or has this forum changed to stockclockers now!!!!!
No you need a 6 pin and an 8 pin. It'll have/need an adapter that converts 2x 6 pin to an 8 pin. So that's 3x 6 pins in total.
Most PSU suppliers will be sending out Free 8 Pin adaptors providing shipping is paid.
Gibbo what PSU are you using with your card?, knew this wouldn't be true, Fuad should be banished from the internets, the utter moron.
Enermax 1000w IIRC.
that website comes out with so much %*!@ that its not true.
How have you measured power usage Gibbo?
Our system had an Enermax 1000W PSU.
I have the ATI Tech/Fact sheet here so upto 200W is requirement at stock clocks with 2x6pin connectors.
If overclocking then you need 1x8pin and 1x6pin connected and then it consumes upto 225W.
I hope ATI don't bash me for stating this but I don't want misleading information such as that going around.
Fact is a decent quality 400-500W PSU will run of these cards fine if your running a Core 2 DUO system or Athlon X2 based system.
This is a load of shens, Kombatant an actual AMD employee has posted that the 750w statement is totally BS
and some more speculation that the AMD slide/information Fuad has is fake things just arn't adding up with it.
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