[SOLVED] Psu Problem - Xfire/sli

KharnakIHazWoW · 10-02-2008, 10:34 AM

I have no idea if i can just buy a 750watt power supply and get 2 gfx cards - how would i make it run? Do i need anything extra?

Getting 2x 4850 with a Advance EA4G-750 750 watts

The only problem i have is getting the cards connected with the psu - help me please

**wrench97** · 10-02-2008, 12:46 PM

Motherboard, case, ???

HawMan · 10-02-2008, 12:50 PM

Make sure the Motherboard is Crossfire (intel) and Not SLI (Nvidia). Crossfire will not run on an SLI board.

750W Good quality should be fine, along with the correct connectors.

KharnakIHazWoW · 10-02-2008, 02:22 PM

I have the motherboard that i need and the only problem i have is connecting the psu to the Radeon graphic cards (4850's) all i need to know is what kind of wires or whatever it is i need :P i just need the name so i can go to the PC shop and say "i need this thingie"

KharnakIHazWoW · 10-02-2008, 02:28 PM

Oh, and if it helps ill post the whole build of the PC --:

Advance EA4G-750 750W PSU

Corsair TWIN 2X PC6400 CL5 4 GB (2x2)

GIGABYTE GA-MA790X-DS4 - Socket AM2+

AMD Black Edition Phenom X4 9850 2.5ghz

SAPPHIRE TECHNOLOGY Radeon HD 4850 - Dual Slot - 512MB x2

Case: Advance Aeolus 8616G

I have a 250gb harddisk with Windows XP Home Edition 32bit but im installing Vista Ultimate 64 bit - you dont see any problems in this setup do you?

/dream

HawMan · 10-02-2008, 02:59 PM

That PSU is terrible and wont power your system

You need :

Thermaltake toughpower
PC Power and cooling
Corsair TX
Coolermaster Real power pro

750Watts will be ok though.

As for the cables, You will need 2 PCI-E 6pin connectors.

KharnakIHazWoW · 10-02-2008, 03:08 PM

Can you possibly find a good PSU on pixmania.com (in denmark) for no more than 600(dkk) danish krones? i have no idea what to look for and im on a budget :P

HawMan · 10-02-2008, 03:12 PM

Im afraid i cant speak danish, and the website is written in it.

Im sure we have someone on the Tech team thats from Denmark, ill ask him to help you out :)

KharnakIHazWoW · 10-02-2008, 03:15 PM

Cool xD thats lovely, thanks alot... hehe, any way i can +rep or something for you? lol

KharnakIHazWoW · 10-02-2008, 03:28 PM

I have an idea - what about this one? Its like 150 watts lower but i dont think 750 watt is really needed.. is it? http://shg.dk/p/2113593

**koala** · 10-02-2008, 03:36 PM

You will need to increase your budget slightly for a good quality 700-750W PSU.

Corsair 750W - 770DKK

Cooler Master 700W - 1000DKK

KharnakIHazWoW · 10-02-2008, 03:39 PM

I hear alot of good about Corsair, so if you think that 750w psu is more than enough i should probably just get it :)

Any tips tho? suggestions or something about my build? Its only for gaming - i use fraps alot though.. dont know if thats got to do with anything

**koala** · 10-02-2008, 03:46 PM

To get a more accurate idea of your computer's power requirements, enter your full system specs into this power calculator and set Capacitor Aging to 25%. Click the Calculate button, then add 30% to the total to allow for PSU inefficiency.

If I was you, I would go for a single Radeon HD4870 instead of the 2 HD4850s. Less power requirements, easier to keep cool, and very similar framerates in games for much less money. So you would have more money to spend on a really good PSU, and possibly add another 4870 at a later date if required.

**magnethead** · 10-02-2008, 03:59 PM

I second the 4870.

KharnakIHazWoW · 10-02-2008, 04:07 PM

Hmm... ok, flunk that plan.. I have a new idea, i have a 2.8 ghz, from my old system, that should OC to at least 3.4 ghz, which is more than fine for me.. And i dont need xfire or a SLI system, just 1 single 4870.. So can anyone help me build a PC up from buttom? as said i have a 2.8 ghz intel core 2 duo lga 775 :P thanks alot for all the help (it wasnt a waste, i learnt alot of stuff about psu's) :p

edit: actually.. My old system was a 3.0ghz intel p4, and a 8800gts 320 g80 and 2gb 667 mhz ram .. 550w psu, and p5n-e sli i think - what system would be just abit better but still good enough to play games like Hellgate London and COD4 with max graphics? dx10 and some AA?

sorry for all the mess im making

and i play WoW aswell, i raid alot.. i would love to be able to do 25man instances without lag - i dont know if its GPU or CPU lag.. or even ram, what would need to better to prevent that kind of lag? if your wondering what 25man instances are, the easiest way to show you what i mean is watch this movie from 0:40 and you will see http://www.youtube.com/watch?v=tGF2zSXrlhU

**linderman** · 10-02-2008, 06:54 PM

your old cpu is probably killing your frame rates ....... the pentium D was not much of a gamer and neither is the P4 single core anymore ....... the 8800 GTS should still be able to kick some butt ......... not with those cpu's though

10-02-2008, 10:34 AM	#1 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	[SOLVED] Psu Problem - Xfire/sli I have no idea if i can just buy a 750watt power supply and get 2 gfx cards - how would i make it run? Do i need anything extra? Getting 2x 4850 with a Advance EA4G-750 750 watts The only problem i have is getting the cards connected with the psu - help me please

10-02-2008, 12:46 PM	#2 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,597 OS: Win7	Re: Psu Problem - Xfire/sli Motherboard, case, ??? __________________ Power Supply and Selection

10-02-2008, 12:50 PM	#3 (permalink)
HawMan Liam Join Date: May 2006 Location: Edinburgh, Scotland Posts: 2,941 OS: Win XP My System	Re: Psu Problem - Xfire/sli Make sure the Motherboard is Crossfire (intel) and Not SLI (Nvidia). Crossfire will not run on an SLI board. 750W Good quality should be fine, along with the correct connectors. __________________ Please Consider Donating to keep the site free.

10-02-2008, 02:22 PM	#4 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli I have the motherboard that i need and the only problem i have is connecting the psu to the Radeon graphic cards (4850's) all i need to know is what kind of wires or whatever it is i need :P i just need the name so i can go to the PC shop and say "i need this thingie"

10-02-2008, 02:28 PM	#5 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli Oh, and if it helps ill post the whole build of the PC --: Advance EA4G-750 750W PSU Corsair TWIN 2X PC6400 CL5 4 GB (2x2) GIGABYTE GA-MA790X-DS4 - Socket AM2+ AMD Black Edition Phenom X4 9850 2.5ghz SAPPHIRE TECHNOLOGY Radeon HD 4850 - Dual Slot - 512MB x2 Case: Advance Aeolus 8616G I have a 250gb harddisk with Windows XP Home Edition 32bit but im installing Vista Ultimate 64 bit - you dont see any problems in this setup do you? /dream

10-02-2008, 02:59 PM	#6 (permalink)
HawMan Liam Join Date: May 2006 Location: Edinburgh, Scotland Posts: 2,941 OS: Win XP My System	Re: Psu Problem - Xfire/sli That PSU is terrible and wont power your system You need : Thermaltake toughpower PC Power and cooling Corsair TX Coolermaster Real power pro 750Watts will be ok though. As for the cables, You will need 2 PCI-E 6pin connectors. __________________ Please Consider Donating to keep the site free.

10-02-2008, 03:08 PM	#7 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli Can you possibly find a good PSU on pixmania.com (in denmark) for no more than 600(dkk) danish krones? i have no idea what to look for and im on a budget :P

10-02-2008, 03:12 PM	#8 (permalink)
HawMan Liam Join Date: May 2006 Location: Edinburgh, Scotland Posts: 2,941 OS: Win XP My System	Re: Psu Problem - Xfire/sli Im afraid i cant speak danish, and the website is written in it. Im sure we have someone on the Tech team thats from Denmark, ill ask him to help you out :) __________________ Please Consider Donating to keep the site free.

10-02-2008, 03:15 PM	#9 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli Cool xD thats lovely, thanks alot... hehe, any way i can +rep or something for you? lol

10-02-2008, 03:28 PM	#10 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli I have an idea - what about this one? Its like 150 watts lower but i dont think 750 watt is really needed.. is it? http://shg.dk/p/2113593

10-02-2008, 03:36 PM	#11 (permalink)
koala Moderator Hardware Team Join Date: Mar 2005 Location: UK Posts: 12,362 OS: XP/7/Ubuntu My System	Re: Psu Problem - Xfire/sli You will need to increase your budget slightly for a good quality 700-750W PSU. Corsair 750W - 770DKK Cooler Master 700W - 1000DKK __________________ New members: Subscribe to your thread (Thread Tools) to receive an instant email notification when you get a reply. TSF Folding@Home Team 85015 - details here

10-02-2008, 03:39 PM	#12 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli I hear alot of good about Corsair, so if you think that 750w psu is more than enough i should probably just get it :) Any tips tho? suggestions or something about my build? Its only for gaming - i use fraps alot though.. dont know if thats got to do with anything Last edited by KharnakIHazWoW; 10-02-2008 at 03:41 PM.

10-02-2008, 03:46 PM	#13 (permalink)
koala Moderator Hardware Team Join Date: Mar 2005 Location: UK Posts: 12,362 OS: XP/7/Ubuntu My System	Re: Psu Problem - Xfire/sli To get a more accurate idea of your computer's power requirements, enter your full system specs into this power calculator and set Capacitor Aging to 25%. Click the Calculate button, then add 30% to the total to allow for PSU inefficiency. If I was you, I would go for a single Radeon HD4870 instead of the 2 HD4850s. Less power requirements, easier to keep cool, and very similar framerates in games for much less money. So you would have more money to spend on a really good PSU, and possibly add another 4870 at a later date if required. __________________ New members: Subscribe to your thread (Thread Tools) to receive an instant email notification when you get a reply. TSF Folding@Home Team 85015 - details here

10-02-2008, 03:59 PM	#14 (permalink)
magnethead Registered User Join Date: Mar 2006 Location: Texas, USA Posts: 3,570 OS: Vista ultimate 32bit My System Blog Entries: 3	Re: Psu Problem - Xfire/sli I second the 4870. __________________ For proper support: what are you running? graphics, cpu, m/board, ram, PSU brand wattage PCI-E requires 26 amps at 12 volts. That's a 650W PSU. Power Supply Info and Selection . Info on thermal compounds & application . TEST PSU USING MULTI-METER . Bench Testing Your System

10-02-2008, 04:07 PM	#15 (permalink)
KharnakIHazWoW Registered User Join Date: Oct 2008 Location: Denmark Posts: 138 OS: Windows Vista Ulti 32bit	Re: Psu Problem - Xfire/sli Hmm... ok, flunk that plan.. I have a new idea, i have a 2.8 ghz, from my old system, that should OC to at least 3.4 ghz, which is more than fine for me.. And i dont need xfire or a SLI system, just 1 single 4870.. So can anyone help me build a PC up from buttom? as said i have a 2.8 ghz intel core 2 duo lga 775 :P thanks alot for all the help (it wasnt a waste, i learnt alot of stuff about psu's) :p edit: actually.. My old system was a 3.0ghz intel p4, and a 8800gts 320 g80 and 2gb 667 mhz ram .. 550w psu, and p5n-e sli i think - what system would be just abit better but still good enough to play games like Hellgate London and COD4 with max graphics? dx10 and some AA? sorry for all the mess im making and i play WoW aswell, i raid alot.. i would love to be able to do 25man instances without lag - i dont know if its GPU or CPU lag.. or even ram, what would need to better to prevent that kind of lag? if your wondering what 25man instances are, the easiest way to show you what i mean is watch this movie from 0:40 and you will see http://www.youtube.com/watch?v=tGF2zSXrlhU Last edited by KharnakIHazWoW; 10-02-2008 at 04:17 PM.

10-02-2008, 06:54 PM	#16 (permalink)
linderman Moderator, Hardware Team Join Date: May 2005 Posts: 20,437 OS: win 2000 pro / Win XP pro My System	Re: [SOLVED] Psu Problem - Xfire/sli your old cpu is probably killing your frame rates ....... the pentium D was not much of a gamer and neither is the P4 single core anymore ....... the 8800 GTS should still be able to kick some butt ......... not with those cpu's though __________________ I still know nothing and I respect that fact, striving to improve and, along the way, help anyone that comes from the place that I used to be! Power Supply Selection LEARN TO BACK-UP YOUR DATA FREE & EASY YouTube - Runtime Software DriveImage XML tutorial