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Is 650w enough to power 2xhd7850 and a overclocked fx8320?

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March 7, 2013 2:29:10 PM

the cpu if overclocked, it will be only by a bit, as i'll use the stock fan;

if it ins't enough, i'll get a cx750, instead of tx650 from corsair
March 7, 2013 2:33:20 PM

Enderegg said:
the cpu if overclocked, it will be only by a bit, as i'll use the stock fan;

if it ins't enough, i'll get a cx750, instead of tx650 from corsair


In my opinion, No. Would also need to know a bit more of your specs.
A good way to guestimate PSU needs, I use http://images10.newegg.com/BizIntell/tool/psucalc/index..., usually buying at least 100watts above what it gives me.

I would go for the 750 or even an 800 to keep you proofed.
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March 7, 2013 3:00:05 PM

Enderegg said:
the cpu if overclocked, it will be only by a bit, as i'll use the stock fan;

if it ins't enough, i'll get a cx750, instead of tx650 from corsair



Hi - stay with the TX - it's a step in quality from CX, and is more
than enough watss/amps need to CF 2 - 7850's even OC.

Tom

AMD suggests 600w, realhardtech suggests 575w, and those have headroom
built in, so a Quality 650w is more than enough.
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March 7, 2013 3:04:30 PM

650 is right on the edge of not being enough, but since you've got a quality unit I think you'll be fine.

I run a pair of 7970s and an overclocked 3770k on a 650W PSU, but it's the SeaSonic X650 Gold, so it's not really comparable to other 650W units.
March 7, 2013 3:09:08 PM

i run 2x5850s and an overclocked i5 with no issue, youll be fine
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March 7, 2013 3:15:17 PM

TX series PSU's are great. I have an original one that I bought 5yrs ago and still running strong. :)  I only went with 750w because, @ the time, it was one of the few with 4 pci-e connectors. Good thing I did as my 5850's needed them. GPU's have become much more power efficient than they were when I bought my TX 750 also.
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March 7, 2013 3:37:37 PM

Enderegg said:
the cpu if overclocked, it will be only by a bit, as i'll use the stock fan;

if it ins't enough, i'll get a cx750, instead of tx650 from corsair



BTW, which 7850's are you getting or have? Almost all 7850's use
only 1 6pin connector, but there are a few non ref models that
use 2 connectors. If you have one of those, you'll need to use
molex to pci-e adapters or choose a psu with 4 pci-e connectors,
all current Corsair 650's have two.
March 7, 2013 5:02:19 PM

I think that I'll push my budget. Or go gaming only. How about fx6300 and hd7870?
March 7, 2013 5:04:08 PM

I like the 7870
I'll get the fx6300.
Why so you think, and please tell me what's that of te molex adaptor?
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March 7, 2013 5:41:59 PM

Enderegg said:
I like the 7870
I'll get the fx6300.
Why so you think, and please tell me what's that of te molex adaptor?


If I'm correct, the 7870 (2GB) mostly require 2 x 6pin.
Some are only 1 x 6pin.
The TX650 has 2 x 6pin connectors I believe, in either case there's no need for anything extra.
March 7, 2013 6:00:41 PM

But I'll crossfire / sli them in one or two years. Now I think I might push my budget and get a gtx660 / hd7870. What brand should I get? Is the gigabyte gtx660 good or should I get the evga or asus?
March 7, 2013 6:04:48 PM

Forgot to say that I'll downgrade the cpu to the fx6300
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March 7, 2013 6:20:55 PM

biopolar said:
If I'm correct, the 7870 (2GB) mostly require 2 x 6pin.
Some are only 1 x 6pin.
The TX650 has 2 x 6pin connectors I believe, in either case there's no need for anything extra.


Yes, there will be a need for molex to pci-e adapters if he CF's 2 7870's
with a tx650 (which comes with 2 connectors, but CF 7870 needs 4),
not a significant issue tho as the tx650 has ample power, also many
gpu's include a molex to pci-e adapter in the box eliminating the
need to purch separately.
March 7, 2013 6:25:25 PM

Enderegg said:
I think that I'll push my budget. Or go gaming only. How about fx6300 and hd7870?


toyftw said:
Yes, there will be a need for molex to pci-e adapters if he CF's 2 7870's
with a tx650 (which comes with 2 connectors, but CF 7870 needs 4),
not a significant issue tho as the tx650 has ample power, also many
gpu's include a molex to pci-e adapter in the box eliminating the
need to purch separately.



You can't SLI gtx650?
I'm talking about the gtx660
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March 7, 2013 6:26:55 PM

toyftw said:
Yes, there will be a need for molex to pci-e adapters if he CF's 2 7870's
with a tx650 (which comes with 2 connectors, but CF 7870 needs 4),
not a significant issue tho as the tx650 has ample power, also many
gpu's include a molex to pci-e adapter in the box eliminating the
need to purch separately.



Ah, sorry, didn't see that. If you're going to crossfire or sli, then you will most likely need two extra molex to pci-e connectors for the 7870 or the 660. As I said an individual GPU of those models usually need 2x6pins alone.
Just make sure that with all you peripherals in your case that you will have enough molex to connect to your PSU and GPU.

Yes, many GPUs now include the extra two m-p.



Enderegg said:
You can't SLI gtx650?
I'm talking about the gtx660



He's referring to the TX650 Corsair PSU, not the GTX660.
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March 7, 2013 6:30:09 PM

Enderegg said:
You can't SLI gtx650?
I'm talking about the gtx660


I wasn't referring to gtx 660, I was referring to the tx650 psu
as having 2 pci-e plugs when 4 pci-e plugs will be needed to
CF 2 7870's.
March 7, 2013 6:38:38 PM

Stupid me
Thx. You are really helpful. I love this community :-D
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March 7, 2013 6:55:14 PM

Enderegg said:
Stupid me
Thx. You are really helpful. I love this community :-D


Not stupid, just didn't notic when you read the reply.

As long as you end up getting sufficiently sound advice from
we forum members to make informed decisions, then we
are all better off.

Let me throw another twist at you:
two 7870's are gonna run $440-$480, you can get 1 7970
for less than $400, the $$ saved would allow you to
avoid trading down on your cpu.

You could also save some
$$ by getting a 550w psu vs 650w, but the tx650's are
on excellent deals right now, so sticking with them prob
wouldn't cost any xtra.

!