Would Corsair tx650w work for HD4870 CrossFire?

Hey

Just wondering if you guys think a Corsair tx650w would be adequate to run this system?
Or would i need to up the PSU to a Corsair tx750w or similar?

Intel Core2 Due E8400 (3.00ghz, 1333mhz fsb)

Asus P5Q PRO motherboard. fsb:1600mhz

Ram: 4x 1GB Crucial Ballistix PC-8500

HDD: Seagate: 500GB, SATAII, 7200rpm, 16MB Cache (possibility of 2nd harddrive in the future)

Graphics: two ATI HD 4870 512mb (CrossFire)

disc drive: 1x DVD-RW

any help is much appreciated.

Regards,
Joe

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Better get 750TX.

Reply to shubham1401

As I see your system isn't overclocked and it's "Only" a dual core I say the 650 can handle 2 4870

Reply to erdinger

With the 750TX you have the scope to oevrclock.
But If you get 650TX you won't be able to overclock the cards(but you can overclock the CPU)

Reply to shubham1401

nah.... He can OC and run crossfire,
toms made a nice chart check it out

''http://www.tomshardware.com/reviews/geforce-radeon-power,2122-6.html''

It would probably top the 4870x2 by 10 %

Reply to ill b ben

Oh they actually have the 4870 in cf aswell..

Reply to ill b ben

birdtweezy wrote :

i dont think u can run two of em good.i have 1000watt for 2 9800gtx's

That is a complete waste of watts. Tom's made a tri-SLI GTX260 rig a while ago, the entire thing used only 800 watts.

You will be fine running 2xHD4870's with a Corsair 650TX.

Reply to brendano257

650 is easily enough. My 4870x2 crossfirex rig with an overclocked i7 and 3 hard drives only pulls something like 800W full load (I'm using a Corsair HX1000). With a pair of 4870s and a 45nm Wolfdale, you'd be hard pressed to exceed 500W no matter how much you overclock.

Oh, and to the poster above with a 1kw and a pair of 9800 GTXs, that's way, way overkill. You only ever need a 1kw PSU for highly overclocked tri/quad GPU setups.

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------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
Reply to cjl

cjl wrote :

650 is easily enough. My 4870x2 crossfirex rig with an overclocked i7 and 3 hard drives only pulls something like 800W full load (I'm using a Corsair HX1000). With a pair of 4870s and a 45nm Wolfdale, you'd be hard pressed to exceed 500W no matter how much you overclock.

Oh, and to the poster above with a 1kw and a pair of 9800 GTXs, that's way, way overkill. You only ever need a 1kw PSU for highly overclocked tri/quad GPU setups.

+1
I mean 350(at the wall) is about the tops for my single 4870 Q6600 6 hard drive system. Add another 190 at the wall(this is a guess based on a 78% efficiency) for a second 4870 and the total is still 540 at the wal. Assuming 78% efficiency(guessing its actually better then that) again you looking at about 422 watts, and that would be with a quad core system, I think you will be good.

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

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

I just checked some of my reference material. Two ATI Radeon HD 4870 video graphics cards operating in Crossfire mode use a combined total of about 295 watts and 25 amps at full load. All of the reference material I checked clearly indicated the two cards use a combined total of less than 300 watts. That's not much compared to some of the other video cards. In addition, the rest of your system does not use very much power either. The Corsair TX650 is rated at 650 watts and has a single large 12 volt rail rated at 52 amps. As other poster have already pointed out it can easily power your system.

Message edited by JohnnyLucky on 08-16-2009 at 04:04:55 PM

Reply to JohnnyLucky

Get the TX750 because it has the required PCIe connectors.

Unless you plan on upgrading to tri-SLI GTX 280s or the like, it's a waste. Your current rig would easily run on this PSU for $70 less than you paid:

http://www.newegg.com/Product/Prod [...] 6817139005

------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
Reply to cjl

If you're buying new with only a $20 difference, why get the 650w? It might be fine for your system now, but what if you add a few HDs, overclock both the CPU and GPUs, fans, lights, cooler? What if you upgrade in a year to 4890s,5870s or 5890s? Spend the extra $20 now and get some headroom for future increases. If you already have the tx650w then keep it.

Message edited by dirtmountain on 08-16-2009 at 11:40:09 PM

Reply to dirtmountain

From what i read here it appears that it would be best for me to go for the tx750w to give me extra room for:

- OC (most likely processor only)

- extra harddrive

- Intel quad core processor update

- and the tx650 doesn't have the required 4x 6-pin connectors.

Before i go ahead and buy tx750 i have one final question:
is 750w over kill for this and is the a lower wattage, lower price option from some like PC power and cooling or antec that any one knows of?

Thanks for all the help and advice from everyone so far and thank you also for any still to come.

regards,
joe

Message quoted 1 times

Reply to thepigeon

thepigeon wrote :

From what i read here it appears that it would be best for me to go for the tx750w to give me extra room for:

- OC (most likely processor only)

Pushing a Q6600 from 3.0 to 3.6 bumps power use by almost 100 watts(load, at the wall, not worth it to me).

thepigeon wrote :

- extra harddrive

Minimal power increse, but there is not such thing as too much, I was just saying your old psu should work if needed

thepigeon wrote :

- Intel quad core processor update

Yeah, get it

thepigeon wrote :

- and the tx650 doesn't have the required 4x 6-pin connectors.

Adapters can allow the cards to work still.

thepigeon wrote :

Before i go ahead and buy tx750 i have one final question:
is 750w over kill for this and is the a lower wattage, lower price option from some like PC power and cooling or antec that any one knows of?

Overkill does not exist, almost all PSU's are at peek efficiency at about 50-55% load(thats 100+ % if it was fanless)

Depending on the sales, you can find many power supplies cheaper, its your call, both the psu you have now and that are very well made and quiet.

Message edited by nukemaster on 08-17-2009 at 01:07:40 AM

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

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

there seems to be some confusion here.... i dont as yet have psu for my system and the graphics card are being shipped today and needs to be ordered etc..... this is a new system, im not upgrading.

(the 2nd graphic card i will order in few month wen i have bit more cash to throw around.)

thxs nukemaster some very helpful advice.

taking onboard what everyone has said i think i will go ahead and get the corsair tx750w as it will give me scope to upgrade and/or overclock parts.

thanks very much to everyone who posted

cheers guys,
joe

Message quoted 1 times

Reply to thepigeon

thepigeon wrote :

there seems to be some confusion here.... i dont as yet have psu for my system and the graphics card are being shipped today and needs to be ordered etc..... this is a new system, im not upgrading.

(the 2nd graphic card i will order in few month wen i have bit more cash to throw around.)

thxs nukemaster some very helpful advice.

taking onboard what everyone has said i think i will go ahead and get the corsair tx750w as it will give me scope to upgrade and/or overclock parts.

thanks very much to everyone who posted

cheers guys,
joe

my bad, thought you had the 650 already. Thats why i said to just keep it on my first post.

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

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

thepigeon wrote :

Hey

Just wondering if you guys think a Corsair tx650w would be adequate to run this system?
Or would i need to up the PSU to a Corsair tx750w or similar?

Intel Core2 Due E8400 (3.00ghz, 1333mhz fsb)

Asus P5Q PRO motherboard. fsb:1600mhz

Ram: 4x 1GB Crucial Ballistix PC-8500

HDD: Seagate: 500GB, SATAII, 7200rpm, 16MB Cache (possibility of 2nd harddrive in the future)

Graphics: two ATI HD 4870 512mb (CrossFire)

disc drive: 1x DVD-RW

any help is much appreciated.

Regards,
Joe

My system has the exact same hardware his does except I overclock. I went with with the tx750 because later on i plan to try out cs with another 4870 and it does have plenty of cables to many..lol go with corsairs modular 750 if you can swing it http://www.newegg.com/Product/Prod [...] 6817139010 but for the price difference I didn't mind the extra cabling...lol

Reply to 0ptic0n

Here is a link to the official AMD 4870 psu requirements:
http://www.amd.com/us/products/des [...] ments.aspx
a 600 watt psu with (4) 6 pin pci-e connectors.

The corsair 650 is a very good unit, and qualifies on the wattage, but fails on the connector issue, having only two.
The 4870 cards will come with molex to pcie adapters, but I don't like to have to use them.
I suggest that you look at one of the quality 750 watt units that are designed to be used with 4 connectors.
It is not a negative to have some extra power available. A psu will operate most efficiently at less than it's maximum capability.

Reply to geofelt

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