Curse

Evil Genius · Jun 30, 2008, 02:35 PM // 14:35

Quote:

Originally Posted by zamial

A real world explanation on psu.

You have 2 motor cycles 1 is a 250cc engine and the other is a 1100cc. Both bikes will go 80 MPH. The 1100 will do it faster and with less wear and tear than the 250 running at full bore.

Personally I don't see how the 1100 can "do it faster" when they're both going at 80 MPH, unless you mean accelerate to that speed faster. Its like the tonne of bricks and tonne of feathers: both weigh the same.

moriz · Jun 30, 2008, 02:58 PM // 14:58

Quote:

Originally Posted by Evil Genius

Personally I don't see how the 1100 can "do it faster" when they're both going at 80 MPH, unless you mean accelerate to that speed faster. Its like the tonne of bricks and tonne of feathers: both weigh the same.

except the ton of feathers will have much greater aerodynamic drag, which makes it much more difficult to accelerate.

Quote:

Seems like the PSU brainwashing worked very well on you. I cannot be bothered explaining all the reasons why 1200W is a complete waste because it should be assumed knowledge for a "Technician".

let's see:

the HD4850 requires 30A on the 12V rail to be completely stable and going at 100% (numbers taken from techreport i believe, i'll have to look it up). that's 30x12=360W. 360Wx3=1080W.

1200W doesn't seem like such a big waste, especially since the cards zamial has in mind will require more than 30A on the 12V rail.

sparky1_2007 · Jun 30, 2008, 05:17 PM // 17:17

Quote:

Originally Posted by Evil Genius

Personally I don't see how the 1100 can "do it faster" when they're both going at 80 MPH, unless you mean accelerate to that speed faster. Its like the tonne of bricks and tonne of feathers: both weigh the same.

Seems like the PSU brainwashing worked very well on you. I cannot be bothered explaining all the reasons why 1200W is a complete waste because it should be assumed knowledge for a "Technician".

umm, it's not brainwashing, it's pretty common knowledge that you want to have more watts available than what's required.

try running a 3-way SLI like he wants to on a 600 watt PSU and see how often it crashes

also, as for the quad core processor, i am not changing that, i want to have it as future proof as possible, so that it can last as long as my current system has.

Kattar · Jun 30, 2008, 05:24 PM // 17:24

Keep it civil everyone, or I'll be forced to edit the crap out of your posts with my new Edit button.

sparky1_2007 · Jun 30, 2008, 05:26 PM // 17:26

Quote:

Originally Posted by Katsumi

Keep it civil everyone, or I'll be forced to edit the crap out of your posts with my new Edit button.

sorry

im sure my post looked to be hostile, but it was more "sarcastic" than anything :P

Lurid · Jun 30, 2008, 05:50 PM // 17:50

The 30A comment was also including a baseline system with the card, and is in no way intended as the amount the card itself is supposed to draw. Wattage < amperage, the distribution of amperage is much more important than total wattage. As is the OEM manufacturer of the PSU, high wattage on random rails from a shitty company means absolutely nothing.

moriz · Jun 30, 2008, 06:01 PM // 18:01

hmm, i knew that 30A looked a little out of place...

either way, modern graphics cards will eat up at least 17A on the 12V rail. that's 204W going to your graphics card alone. with 3 cards, that's 612W. i'm assuming you'll want other components powered as well (like the CPU, motherboard, harddrives/optical drives, peripherals)....

either way, a good quality 1200W PSU for triple SLI is generally a good idea.

Snograt · Jun 30, 2008, 08:55 PM // 20:55

I am in agreement. All the major mobo companies recommend 1KW+ for tri-SLI and I'm sure it's not because of backhanders from PSU companies

Lurid · Jul 01, 2008, 12:33 AM // 00:33

I still don't get how the topic always goes to "powering tri SLI" considering thats a relatively small marketshare compared to the single card / SLI (Crossfire) users. Either way I agree getting more amperage / wattage t han you think you'll need isn't a bad idea, just so long as you don't go crazy. A high wattage PSU from an unreputable source is generally nowhere near as good as a lower wattage (Obviously within reason) unit from a better company. People too often look at a Rosewill or the the like and say "Oh, thats high wattage its good"

Evil Genius · Jul 01, 2008, 01:56 AM // 01:56

There was nothing uncivil in what i posted: it was all well informed, well researched and fact based.

sparky1_2007 · Jul 01, 2008, 05:04 AM // 05:04

anyways, to get back on topic, i just saw a PC power and cooling 750watt PSU, do you guys think that it should be able to power a single 4870x2?

here's the specs:
Silencer 750 Quad (Black) Technical Specifications

Current: 12A
Efficiency: 83%
DC Output

Output: +5V @ 30A
+12V @ 60A
-12V @ 0.8A
+3.3V @ 24A
+5VSB @ 3A
continuous = 750W
peak = 825W

these are dumbed down specs, but you can find the whole thing on PC power and cooling's website.

and you can get one of these for about $120-130 after mail in rebate

Lurid · Jul 01, 2008, 06:15 AM // 06:15

Thats a great unit, and will be able to power your rig with ease.

Azza · Jul 01, 2008, 06:19 AM // 06:19

i have a crapload of money to spend, can some 1 give me a full detail of the best setup?

Evil Genius · Jul 01, 2008, 07:37 AM // 07:37

Azza best idea is to make a new thread. Tell us your budget and country. Perhaps:

Motherboard: Gigabyte X48-DQ6
Supports Quad Core and RAID.

Processor: Intel Q9450
Fast, cool, Quad core and overclockable.

Graphics: 2 times 4870 in CF
Up there with the GTX280 in SLI

Sound Card: Integrated
With the Creative suite of cards having driver problems in Vista, combined with the quality of on-board solutions these days, there's really no need to pay the excessive cost of the x-fi series.

RAM: 4G Kit-1066 (2x2G) Crucial
4gb 1066 for overclocking craziness.

Hard Drive: 2x Seagate SATA 500G
For all your data storage needs.

Optical Drive: Pioneer SATA 215BK
Widely regarded as one of the best around.

Case: Antec P182
External fan speed control for top and rear fans, and cable organisers make this an awesome case to own.

Power Supply: Corsair TX-750W
While this system still won't use 750w, you'll want this PSU for Crossfire.

If you really want the best:
Intel QX9770
XFX 790i Ultra SLI
3 GTX280 in SLI
Crucial Ballistix 4GB DDR3 2000Mhz
WD RaptorX Hard drives or SSDs
Corsair HX-1000
Thermaltake SwordM

Not that I recommend getting that stuff - its just the best available atm. Like I said, post your budget and what you have already and need.

Snograt · Jul 01, 2008, 10:10 AM // 10:10

Quote:

Originally Posted by Evil Genius

If you really want the best:
Intel QX9770
XFX 790i Ultra SLI
3 GTX280 in SLI
Crucial Ballistix 4GB DDR3 2000Mhz
WD RaptorX Hard drives or SSDs
Corsair HX-1000
Thermaltake SwordM

....iawtc