Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > PSU for 2 4870X2
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Nytmare   08-29-2008 at 05:03:12 AM

Thread title says it all.

Have Corsair 1000w PSU (CMPSU-1000HX 1000W RT)..... If I go nuts and get another 4870X2 (total =2 GPU)....the Corsair gonna cut it?
Probably just wishful thinking since I just bought the PSU :o

If no....what level do I need 1200w, 1300w ?
Brand rec ?...Corsair and Antec do not seem to have PSU at this level. PC Power and Cooling is not modular and $$$. These are the high end brands I hear recommended.
Modular is also a must have. :non:

Other components.......

Quad Core CPU
2 HD
2 opticals
1 Sound Card
1 Fan contoller
8 x 120 mm fan, 1 x 240 mm fan


THX!


Message edited by Nytmare on 08-29-2008 at 05:06:08 AM
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dagger   08-29-2008 at 05:06:58 AM
- 0 +

If 12v rails ratings are good, it should be enough for a quad plus 2 4870x2. All the fans and cd/dvd drives are just change.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
resonance451   08-29-2008 at 05:27:34 AM
- 0 +

Make sure that Corsair has the right connectors.

Message quoted 1 times
------------------------------ Intel qx9650 @3.81GHz (10x multi) + EVGA 780i SLI mobo @381MHz FSB
2x EVGA 8800GT 512mb OC'd, OCZ DDR2 1066MHz 4gb
OCZ 850W PSU, Seagate 750GB HDD SATA 32mb cache CM Stacker 830 SE
Sound setup: FireFace 800, JBL 4328 speakers
 Reply to resonance451
dagger   08-29-2008 at 05:28:37 AM
- 0 +

resonance451 wrote :

Make sure that Corsair has the right connectors.



Doesn't matter, the cards comes with molex to pcie adaptors.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
Conumdrum   08-29-2008 at 05:46:15 AM
- 0 +

Make sure it has Nukler Reactor attached as GWB would say. I think it will be okay.

We really need feedback in this as it's new territory.

Wonder when my PC will need a 50 amp feed to the AC outlet?

------------------------------

 

Reply to Conumdrum

Nytmare   08-29-2008 at 06:19:56 AM
- 0 +

Probably should just go with the flow and keep what came in the mail from Newegg :ange: I already did a last minute change and went from 8500 Dual Core to a 9550 Quad Core :kaola:

Not even sure if I will get another 4870x2 at this point. Gonna have to buy a larger monitor (I am hearing 28-20" ) anyway to make quad Crossfire worth the effort. I do not want to have a "nuclear reactor" PSU if I do not really need it. On the other hand, I do want the room if I choose to add the second GPU. :ouch:

I am not sure if I have seen any benchmarks on quad Crossfire with two 4870x2 GPU's. Any link on a benchmark for this set up?
I suspect, the FPS gain would not be that much over the one 4870x2 GPU to notice any difference.


Message edited by Nytmare on 08-29-2008 at 06:29:07 AM
Reply to Nytmare
englandr753   08-29-2008 at 07:14:34 AM
- 0 +

I would think that psu can handle that setup. If not, this is a new era we are entering where the 1000 watt + psus are truly being utilized, finally...

Message quoted 1 times
Reply to englandr753
dagger   08-30-2008 at 01:47:11 AM
- 0 +

englandr753 wrote :

I would think that psu can handle that setup. If not, this is a new era we are entering where the 1000 watt + psus are truly being utilized, finally...



Performance is underwhelming.
http://www.tweaktown.com/reviews/1 [...] index.html
Look through all pages for other games. The scaling problem is certainly not limited to Crysis.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
Anonymous   09-03-2008 at 07:59:13 PM
- 0 +

Now Im starting to wonder if CF 4870X2 is just overkill....

Message quoted 1 times
Reply to Anonymous
chookman   09-04-2008 at 03:48:31 AM
- 0 +

^your only just starting to wonder if 4 gpus are overkill?

HD4870 single is more than enough for most people.

Message quoted 1 times
------------------------------ "This thread made me strap on my lolerskates and head for my roflcopter."
 Reply to chookman
dagger   09-05-2008 at 12:04:42 AM
- 0 +

Anonymous wrote :

Now Im starting to wonder if CF 4870X2 is just overkill....



chookman wrote :

^your only just starting to wonder if 4 gpus are overkill?

HD4870 single is more than enough for most people.



Saw the benchmarks, anyone? 4870x2 cf is not overkill in games where it performs below a single 4870x2. Quad crossfire problems. Wait for updated drivers to come out, or it's just more money for less performance.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
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