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MAJOR QUESTION ! x2 5870's with a 850w ?

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July 17, 2010 12:10:31 AM

Hey guys I need a answer for this ASAP .

I'm getting this power supply, http://www.newegg.com/Product/Product.aspx?Item=N82E168...
It's a 850w
and I'm planning to buy this 5870 , http://www.newegg.com/Product/Product.aspx?Item=N82E168...
I might crossfire it soon and maybe even OC
Does anyone know if I have enough power for my video cards or no ?

This is my build btw ,

Antec Nine Hundred Two Black Steel ATX Mid Tower Computer Case
http://www.newegg.com/Product/Prod [...] 6811129058

Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Prod [...] 6822136533

ASUS M4A89TD PRO/USB3 AM3 AMD 890FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
http://www.newegg.com/Product/Prod [...] 6813131655

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 2000 (PC3 16000) Desktop Memory Model F3-16000CL9D-4GBRH
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz Socket AM3 125W Six-Core Desktop Processor HDT90ZFBGRBOX
http://www.newegg.com/Product/Prod [...] 6819103849

Someone please help me
July 17, 2010 12:33:06 AM

850watts MAY be okay but if you want to be very very safe a 900-950W would be good for any major overclocking :) 
July 17, 2010 12:37:16 AM

Same PSU I have. Though i got mine at Fry's for $80 when it was on sale. I Have a 1055t and 5850.

http://www.tomshardware.com/reviews/radeon-hd-5870,2422...

5870 Crossfired uses 561 watts, Just to be safe round that up to 600 plus 100 watts for overclocking = 700 watts USED AT PEAK. So a 800 watt PSU becomes recommended.

Heh after i made that recommendation i checked a psu calculator and it comes to a recommendation of 789 watts. So your good with that PSU.

As long as you dont water cool or add anything power demanding to your system that psu is perfect. Since it will be running at 75% of peak power when crossfired and OC'D though i wouldnt use this PSU for longer than 3 years.
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July 17, 2010 12:57:41 AM

chaosgs said:
Same PSU I have. Though i got mine at Fry's for $80 when it was on sale. I Have a 1055t and 5850.

http://www.tomshardware.com/reviews/radeon-hd-5870,2422...

5870 Crossfired uses 561 watts, Just to be safe round that up to 600 plus 100 watts for overclocking = 700 watts USED AT PEAK. So a 800 watt PSU becomes recommended.

Heh after i made that recommendation i checked a psu calculator and it comes to a recommendation of 789 watts. So your good with that PSU.

As long as you dont water cool or add anything power demanding to your system that psu is perfect. Since it will be running at 75% of peak power when crossfired and OC'D though i wouldnt use this PSU for longer than 3 years.

So if i dont oc my two 5870's then my PC is safe with the 850w ?
July 17, 2010 3:15:24 AM

You should still be good to OC with the Antec.
I like this 1 a little better for less money. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
It's has a Silver rating, bigger fan and only 1 rail. the only draw-back is that it's "not" modular so you would need to do some wire management to have a clean look inside.

PS: compare the reviews
July 17, 2010 3:25:39 AM

Yeah, the Corsair unit is both cheaper and better. Either will be fine for crossfired HD5870s even OCed to the max.
July 17, 2010 3:58:58 AM

yep you'll be be fine, even with pretty decent overclocks, the 5870's use alittle over 200 watts, and the 1090 uses 125, so that's maybe 575 at stock, plus 100 watts for mobo ram hard drives and optical drives, so you've still got quite a bit of wattage head room to overclock
July 17, 2010 4:10:45 AM

easily. not sure where some people are getting their numbers from, you could heavily overclock two 5870s on a decent 750w PSU (like a corsair hx750, and i knwo from experience)

you will have no problems with an 850w, as long as its a good brand.
July 17, 2010 4:26:50 AM

+1^^

TX850>TPQ-850

It's cheaper/better, single rail vs 4 rails, better track record, made by Corsair, etc..
July 17, 2010 5:37:44 AM

OvrClkr said:
+1^^

TX850>TPQ-850

It's cheaper/better, single rail vs 4 rails, better track record, made by Corsair, etc..

Anteec is a better brand in my opinion . Isnt the more rails the better ? . The Antec also has over current protection and modular.
July 17, 2010 5:59:24 AM

this isn't really a case of opinion, the corsair PSU is better. more rails is not better, it can supply a lower total wattage and is less efficient.

July 17, 2010 6:10:21 AM

ipenguins said:
Anteec is a better brand in my opinion . Isnt the more rails the better ? . The Antec also has over current protection and modular.


I have purchased both brands for many years and if anything the Antec has given me more problems vs. the Corsair. Out of 3 Antec PSU's that I have purchased the most reliable one was the EA500 and the EA650 (still going strong), purchased a TPQ-1000 for a dual 4870x2 setup and it went poof! The first time a PSU has blown up n front of me, literally.

I have been purchasing Corsair PSU's from the get go and to this date I have yet to have one fail on me, heck the only reason I do not have one for my self is because I traded my TX650 for a more powerful PSU and i wanted modular so it was a no-brainer.

More rails is not better, I would rather have one big fat rail as opposed to 4 or 6 dinky rails and not have to do the math when its fully loaded, not really saying that a multiple rail PSU will perform less than a single rail but since I have yet to see a single rail PSU fail on me I will put my money on it ;) 

Current protection?

I think you are talking about UVP (Under Current Protection) SCP (Short Circuit Protection) and OPP (Over Power Protection) which is basically found in all high end PSU's :) 






July 17, 2010 6:25:21 AM

yea i agree with psycho, the only reason the dual 460's are uber fast is due in part of AMD's poor scalability vs. NV's awesome scalability. Get the dual 460's and a few screens with that extra cash for a nice surround setup.
July 17, 2010 6:42:00 AM

Sorry, I couldn't find any reviews of either PS at the 2 sites I go to for information on Power Supplies , Johnny Guru or Hardwaresecrets.

Over-volt protection comes with any top tier PS. Multiple Rails and Single Rail is a debate that has gone on for a few years now and to me is just a matter of personal preference. Modular is easier to work with, again personal preference.

I'm not saying that the Antec is a bad choice. But just looking at the review numbers at the Egg ~Corsair 605 reviews with 91% at 4 or 5 eggs ~ Antec 375 reviews 81% 4 or 5 Eggs (you may need to weed through a few of them to find ones of relevance).

I don't think you can go wrong either way and it's your money , but if you have any doubts, start a Thread in the Power Supply section. We have people here at Tom's who are far more knowledgeable the I am.

Anyway, enjoy your new toy.
UF
July 17, 2010 7:51:59 AM

unclefester said:
Sorry, I couldn't find any reviews of either PS at the 2 sites I go to for information on Power Supplies , Johnny Guru or Hardwaresecrets.

Over-volt protection comes with any top tier PS. Multiple Rails and Single Rail is a debate that has gone on for a few years now and to me is just a matter of personal preference. Modular is easier to work with, again personal preference.

I'm not saying that the Antec is a bad choice. But just looking at the review numbers at the Egg ~Corsair 605 reviews with 91% at 4 or 5 eggs ~ Antec 375 reviews 81% 4 or 5 Eggs (you may need to weed through a few of them to find ones of relevance).

I don't think you can go wrong either way and it's your money , but if you have any doubts, start a Thread in the Power Supply section. We have people here at Tom's who are far more knowledgeable the I am.

Anyway, enjoy your new toy.
UF

I'm planning to get the corshair because of the many bad reviews about it blowing up. Is this a god one ?
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
July 17, 2010 7:55:30 AM

^

one of the best PSUs on the market. very high quality, efficient and modular. and you could probably power 3 5870's off of it.
July 17, 2010 8:02:34 AM

welshmousepk said:
^

one of the best PSUs on the market. very high quality, efficient and modular. and you could probably power 3 5870's off of it.

does it have over current protection and all that protection stuff ?
July 17, 2010 1:12:08 PM

Take a look at the 1200 and the CP-850. With the Newegg sale on the case and the PS price you can get a roomier case with better airflow and a superior PS at about the same cost.
July 17, 2010 5:46:49 PM

i'd also say the corsair would be the better option have that exact model and it's been wonderful, never had enough hardware to really stress it, but it runs cool and quieter and single rails takes alot of the guess work out of.

i would agree if the 460, even though each is less powerful then a 5850 they simply scale so much better combined they are right there with 5870's CF, so money saving less heat and power, and cheaper (it's really weird saying that for a fermi)
July 17, 2010 7:51:14 PM

jonnyboyC said:
i'd also say the corsair would be the better option have that exact model and it's been wonderful, never had enough hardware to really stress it, but it runs cool and quieter and single rails takes alot of the guess work out of.

i would agree if the 460, even though each is less powerful then a 5850 they simply scale so much better combined they are right there with 5870's CF, so money saving less heat and power, and cheaper (it's really weird saying that for a fermi)

Yes but i kinda want a AMD VISION .I been with ATI for a long time and ATI is beating them really. Its like intel vs AMD
July 17, 2010 8:07:43 PM

Quote:
You're just another retarded fanboi then. :lol:  Don't worry.. You fit in very well here. :whistle: 

I am not . I like nvidia but both cards are nice and stuff. Like the evga, I like that brand . But since im getting amd why dont i just get a ATI to get amd vision ?
July 17, 2010 8:32:37 PM

amd vision is just a generic walmart style performance guideline for people who don't know the basic about computer tech but i didn't look at your system till just now, and if your going amd it might be better to get ati simply because i don't think nvidia's chipsets especially on amd boards aren't very good at least to my knowledge. so CF 5870 might be better unless someone know a good amd board with nvidia chipsets.

but back to your original question 850 is fine
July 17, 2010 8:41:50 PM

jonnyboyC said:
amd vision is just a generic walmart style performance guideline for people who don't know the basic about computer tech but i didn't look at your system till just now, and if your going amd it might be better to get ati simply because i don't think nvidia's chipsets especially on amd boards aren't very good at least to my knowledge. so CF 5870 might be better unless someone know a good amd board with nvidia chipsets.

but back to your original question 850 is fine

Man now its down to antec or corsair
http://www.newegg.com/ProductSort/VendorArticleDetail.a...

I need major help ..

Best solution

July 17, 2010 9:08:56 PM
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Yes, Antec is a very good brand but Corsair is arguably the best. Considering it is cheaper as well the decision shouldn't be that hard unless you really want a modular PSU and are willing to trade off the extra money and slightly lower quality to get it.
July 17, 2010 9:15:30 PM

jyjjy said:
Yes, Antec is a very good brand but Corsair is arguably the best. Considering it is cheaper as well the decision shouldn't be that hard unless you really want a modular PSU and are willing to trade off the extra money and slightly lower quality to get it.

The power supply im getting from corsair has a modular
July 17, 2010 9:30:18 PM

Oh, didn't see that you switch to the HX. Yeah, go for it, it is a bit pricey but that is the best you can buy pretty much.
July 17, 2010 9:57:00 PM

jyjjy said:
Oh, didn't see that you switch to the HX. Yeah, go for it, it is a bit pricey but that is the best you can buy pretty much.

nope 149$ with rebate :D 
July 17, 2010 11:48:11 PM

Have you decided on your video card(s) for certain yet? If you are sticking with the HD5870 then I highly recommend you grab this while it is on sale this weekend;
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
It is exactly the same as the card you linked except that is a full $56 dollars cheaper(including the shipping) and doesn't have the factory OC. The factory OC on the XXX card is tiny, only 25mhz. In general it isn't smart to pay someone else to overclock your video card as you can always easily do it yourself with better results. In this case with the price difference that huge and the OC that tiny it wouldn't make sense at all.
July 18, 2010 1:18:37 AM

The one he linked doesn't have voltage control either. I don't think it is that big of a deal on the HD5870 actually. The stock voltage is set higher than the other cards and they can usually OC up to around 950mhz anyway. So a voltage bump will gain you 50-100mhz. That's nice but not exactly a deal breaker imo and the ASUS card with voltage control is $60 more expensive.
July 18, 2010 1:30:30 AM

jyjjy said:
Have you decided on your video card(s) for certain yet? If you are sticking with the HD5870 then I highly recommend you grab this while it is on sale this weekend;
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
It is exactly the same as the card you linked except that is a full $56 dollars cheaper(including the shipping) and doesn't have the factory OC. The factory OC on the XXX card is tiny, only 25mhz. In general it isn't smart to pay someone else to overclock your video card as you can always easily do it yourself with better results. In this case with the price difference that huge and the OC that tiny it wouldn't make sense at all.

I'm actually planning to get this one
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
I'm not buying my build till 2 weeks
July 18, 2010 1:34:01 AM

Well if you have the money for the card now grab the one for $370. That is a pretty rare price for an HD5870 and I'm not seeing any difference in the specs between that one and the card you linked.
July 18, 2010 1:41:40 AM

ipenguins said:
yes but i only need 850w


actually, that was for pyscho as he said he would replace his antec 1200w with a corsair if they had a 1200w

and yes, 850 is plenty, though there is an 850 of that series when it comes out Corsair AX850, though i would imagine the HX850 will be cheaper and be just fine as well
July 18, 2010 4:03:42 AM

Why "ESPECIALLY" an HD5870 when it's stock clocks and voltage are already quite high?
July 18, 2010 4:50:27 AM

IMO any card that lacks voltage control is not worth the cash unless you get it for cheap. You normally get a nice 25/30% increase in performance as opposed to most cards that give you a 10/15% max OC at stock volts.
July 18, 2010 5:57:16 AM

OvrClkr said:
IMO any card that lacks voltage control is not worth the cash unless you get it for cheap. You normally get a nice 25/30% increase in performance as opposed to most cards that give you a 10/15% max OC at stock volts.

If we were talking about the HD5850/HD5830/GTX 470 or any of a number of other cards I would agree but he is specifically looking at the HD5870 and voltage control simply isn't a big deal for that card specifically.
July 18, 2010 6:19:58 AM

i would agree, on the lower clocked cards, like the 5830 5850 and the 47o voltage control, is a pretty big deal, but 5xxx can only get around 1ghz max on core, and starting at 850, the voltage is already there to get to 920-50, so why spend alot extra cash to bump the voltage up just to get that 1ghz which equates to like 1 maybe 2 fps
July 18, 2010 7:41:41 AM

jonnyboyC said:
i would agree, on the lower clocked cards, like the 5830 5850 and the 47o voltage control, is a pretty big deal, but 5xxx can only get around 1ghz max on core, and starting at 850, the voltage is already there to get to 920-50, so why spend alot extra cash to bump the voltage up just to get that 1ghz which equates to like 1 maybe 2 fps


true, and the fact that if he is going to CF later on he wont need to do any OC'ing. But I would change the motherboard to a MSI 890FXA-GD70 and buy dual 460's. This way he will have way more GPU power than a single 5870 and not have to worry about adding more cards down the road unless needed which I doubt since most review put the 460 SLI (stock) at 5-7% slower than a 5970. Just trying to get him the most bang for buck option.


July 18, 2010 5:40:51 PM

OvrClkr said:
true, and the fact that if he is going to CF later on he wont need to do any OC'ing. But I would change the motherboard to a MSI 890FXA-GD70 and buy dual 460's. This way he will have way more GPU power than a single 5870 and not have to worry about adding more cards down the road unless needed which I doubt since most review put the 460 SLI (stock) at 5-7% slower than a 5970. Just trying to get him the most bang for buck option.

You can go buy me a 5970 and put that 480 with the 5970 hmm (: IM with ATI. Nvidia is cheap just like amd . AMD and Nvidia do not fit well. I use to be a nvidia fan but my card was just crapp as hell .
July 18, 2010 8:03:21 PM

ipenguins said:
You can go buy me a 5970 and put that 480 with the 5970 hmm (: IM with ATI. Nvidia is cheap just like amd . AMD and Nvidia do not fit well. I use to be a nvidia fan but my card was just crapp as hell .


on of my previous builds had an AMD CPU with dual gts250's and I never had an issue, if anything it was the a great budget gaming pc. Intel/nvidia is great but it's also expensive and some people like to keep their socket going for more than 3 years, makes upgrading so much easier ;) 
July 18, 2010 10:05:11 PM

OvrClkr said:
on of my previous builds had an AMD CPU with dual gts250's and I never had an issue, if anything it was the a great budget gaming pc. Intel/nvidia is great but it's also expensive and some people like to keep their socket going for more than 3 years, makes upgrading so much easier ;) 

Why do you think i'm going AMD :D  I dont have money for a new mobo when the 12 cores come out .I would get the 480 but the full load temperature is so high . Reached about 80 C' . I do not know how to watercool either , so thats why im going with the 5870. Whats so bad about high voltage ?
July 18, 2010 10:16:11 PM

ipenguins said:
Whats so bad about high voltage ?
Actually were were discussing whether or not you can raise the voltage on the card. Doing so allows you to overclock the card to a higher degree.
July 18, 2010 11:16:22 PM

jyjjy said:
Actually were were discussing whether or not you can raise the voltage on the card. Doing so allows you to overclock the card to a higher degree.

i'm not overclocking so it dosnt matter ;D
July 18, 2010 11:53:19 PM

You should IMO. No reason not to. You should be able to gain 10-15% even on the stock voltage.
July 19, 2010 12:10:13 AM

jyjjy said:
You should IMO. No reason not to. You should be able to gain 10-15% even on the stock voltage.

Yeah your rite , i mite go fro a evga 480
July 19, 2010 12:38:32 AM

The GTX 480 needs a ton of power/gives off a lot of heat. If you are going to SLI 480s you'll need a better PSU and make sure you have very good case airflow.
July 19, 2010 12:44:20 AM

jyjjy said:
The GTX 480 needs a ton of power/gives off a lot of heat. If you are going to SLI 480s you'll need a better PSU and make sure you have very good case airflow.

Heard its hot so 460 then .
July 19, 2010 1:33:56 AM

SLIed GTX 460s are a very good deal for the money. They give performance quite close to an HD5970(about 10% slower) at stock and can usually OC a ton(30%+) Make sure to get the 1gb version if you are SLIing.
!