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950W rosewill psu enough for 4870x2 crossfire?

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br3nd064   09-25-2008 at 03:41:18 AM
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Could you post a link for it? Rosewill PSU's generally aren't the best quality, so I'd probably look into a different brand.

Reply to br3nd064
dagger   09-25-2008 at 03:43:05 AM
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It depends on 12v rail ratings. Rosewill units can be a bit flimsy, quality can be poor, so it's probably not a good idea to push it too far.

If it's this unit, it should do.
http://www.newegg.com/Product/Prod [...] 6817182096

Although 12v rail ratings are on the low side. My 850w unit has the same 4x20amps.


Message edited by dagger on 09-25-2008 at 03:46:25 AM
------------------------------ 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
rangers   09-25-2008 at 04:26:12 AM
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go hear

http://www.jonnyguru.com/forums/showthread.php?t=3990
Corsair is the best at the moment you could find a company that buys of the same company that makes Corsair but sell's them cheaper

Message quoted 1 times
Reply to rangers
nukemaster   09-25-2008 at 04:32:36 AM
- 0 +

Dual X2's take about 42.5amps together leaving 25amps(67.5 - 42.5) on the 12 volt rail for the rest.

As long as it holds its specs you are fine.

Remember while each "Rail" is limited(for safety reasons) to 20a there is only 67.5 to go around. Adding rails does not work

If it was 80 it would be
20 x 4 = 80
80 x 12 = 960watts(thats over the full psu :p)

------------------------------ http://i33.tinypic.com/sw3a5y.png
http://tinyurl.com/26uxxb - C2/i7 Temp? http://tinyurl.com/cj3pw - VGA power?
http://tinyurl.com/5v55wk - C2 Mem performance? http://tinyurl.com/6pmbke - SLI/Xfire?
http://tinyurl.com/yfmxdc9 - Part Guide?
 Reply to nukemaster
nukemaster   09-25-2008 at 04:33:18 AM
- 0 +

rangers wrote :

go hear

http://www.jonnyguru.com/forums/showthread.php?t=3990
Corsair is the best at the moment you could find a company that buys of the same company that makes Corsair but sell's them cheaper


great link!

------------------------------ http://i33.tinypic.com/sw3a5y.png
http://tinyurl.com/26uxxb - C2/i7 Temp? http://tinyurl.com/cj3pw - VGA power?
http://tinyurl.com/5v55wk - C2 Mem performance? http://tinyurl.com/6pmbke - SLI/Xfire?
http://tinyurl.com/yfmxdc9 - Part Guide?
 Reply to nukemaster
rammar16   09-25-2008 at 04:44:42 AM
- 0 +

the recommended amount is a 1k watt and i would say a better brand

i would get the corsair 1k watt it is about $220 i believe the 950watt by rosewill is about $190 so it isn't that bad

hope this helps

Message quoted 1 times
Reply to rammar16
Nica Guy   09-25-2008 at 04:47:00 AM
- 0 +

what about this one?
i dont find it expensive for the wattage it has...

http://www.newegg.com/Product/Prod [...] 6817159067

also, im a noob at power stuff what are amps for? does it have a translation to watts?

Message quoted 1 times
Reply to Nica Guy
dagger   09-25-2008 at 04:49:08 AM
- 0 +

rammar16 wrote :

the recommended amount is a 1k watt and i would say a better brand

i would get the corsair 1k watt it is about $220 i believe the 950watt by rosewill is about $190 so it isn't that bad

hope this helps



Considering the cost of higher wattage psus, it might be more cost effective to get a mainstream psu plus an expansion, like those:
http://www.newegg.com/Product/Prod [...] 6817153069
http://www.newegg.com/Product/Prod [...] 6817104054

Nica Guy wrote :

what about this one?
i dont find it expensive for the wattage it has...

http://www.newegg.com/Product/Prod [...] 6817159067

also, im a noob at power stuff what are amps for? does it have a translation to watts?



The rail ratings there isn't that much better, with 12v rails 3 and 4 being 25 instead of 20 amps. It should be enough. Bust cost is high. Also, Coolmax CUQ models are listed as tier 5, which is pretty bad. CTG units are tier 2, but that's not it.
http://www.xtremesystems.org/forum [...] p?t=108088

You're still better off with a much cheaper good quality mainstream psu plus an expansion.

Consider this combination:
http://www.newegg.com/Product/Prod [...] 6817703009
The $30 off on promo code wasn't included in sticker price. This unit is considered the gold standard in psu. It's more than enough to support one x2 and rest of the system.
http://www.newegg.com/Product/Prod [...] 6817153069
This expansion is more than enough to power the second x2.


Message edited by dagger on 09-25-2008 at 05:00:00 AM
------------------------------ 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
Nica Guy   09-25-2008 at 04:56:11 AM
- 0 +

so why dont u suggest a good psu for 4870x2 crossfire?
between $170 and $220

Reply to Nica Guy
Nica Guy   09-25-2008 at 05:09:57 AM
- 0 +

or tell me what should i look in a psu?

Message quoted 1 times
Reply to Nica Guy
dagger   09-25-2008 at 05:13:02 AM
- 0 +

Nica Guy wrote :

or tell me what should i look in a psu?



Good 12v rail ratings plus quality. Prices increase drastically when wattage moves above mainstream. You should really consider a setup like this instead:

Quote :


http://www.newegg.com/Product/Prod [...] 6817703009
The $30 off on promo code wasn't included in sticker price. This unit is considered the gold standard in psu. It's more than enough to support one x2 and rest of the system.
http://www.newegg.com/Product/Prod [...] 6817153069
This expansion is more than enough to power the second x2.

Message quoted 1 times
------------------------------ 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
dagger   09-25-2008 at 05:14:43 AM
- 0 +

Nica Guy wrote :

what about this one?

http://www.newegg.com/Product/Prod [...] 6817139006



Higher quality unit, although a single 750w unit just won't be enough to power a full system plus 2 4870x2s.

------------------------------ 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
Nica Guy   09-25-2008 at 05:27:57 AM
- 0 +

dagger wrote :

Good 12v rail ratings plus quality. Prices increase drastically when wattage moves above mainstream. You should really consider a setup like this instead:

Quote :


http://www.newegg.com/Product/Prod [...] 6817703009
The $30 off on promo code wasn't included in sticker price. This unit is considered the gold standard in psu. It's more than enough to support one x2 and rest of the system.
http://www.newegg.com/Product/Prod [...] 6817153069
This expansion is more than enough to power the second x2.






WOW it has a 20% off coupon i bought it...
thanks dagger...

Reply to Nica Guy
Nica Guy   09-25-2008 at 05:29:47 AM
- 0 +

hey, how do i claim the coupon? it asks for security code...

Reply to Nica Guy
Nica Guy   09-25-2008 at 05:35:22 AM
- 0 +

ok i was in the wrong place... i got it... for $116 THATS A GOOD DEAL...

Reply to Nica Guy
rdb   09-26-2008 at 02:40:24 PM
- 0 +

v rosewill ^ PcPower, Corsair

Reply to rdb
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