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upgrading to 770 do I need a new PSU

agodin

agodin

agodin

Associate
Joined
5 Feb 2009
Posts
7
Hey all,

Looking at upgrading my GTX 560 to the GTX 770 although I am a little worried about the PSU I currently have the Galaxy DXX 1000w (http://www.guru3d.com/articles_pages/enermax_galaxy_1000_watt_dxx_psu,1.html) I think is the one. reading the review he mentioned it was between 81-85% effecencey if this makes any diffirence

I know it has enough watts but after looking into my case i noticed it only had 2x 6pin PCI-E connectors where as 770 requires x1 8pin + x1 6pin

So question is do i just use a 6-8pin adapter (sure the GPU comes with one anyway) or invest in a new PSU?

Thanks in advance!
 
hehe thanks for the input ben, my concern is with the 8pin connector that the amount of juice it can put out :P
Cost a small fortune when I got the PSU a few years ago so would prefer it not going to waste.
 
Thanks for the info all much apprecated, will any adaptor do or are some better then others?
maybe you could link some from the store here would be great

Thanks again!
 
agodin said:
Thanks for the info all much apprecated, will any adaptor do or are some better then others?
maybe you could link some from the store here would be great

Thanks again!
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I just looked at your psu on newegg and it says that your psu comes with '8-Pin PCI-E 2.0', so couldn't you plug that into your psu and use that? or am i missing something?
 
I too read it came with an 8pin but I belive there is an older version of the same PSU which did not have 8pins back then...anyway after diggin out the box I can confirm it had no 8 pins with it just x4 6pins.

Ill just order the card and try the cables provided and hope for the best :)

Thanks all
 
setter said:
Wouldnt even need as much as 500w for a single 770. My previous 3770k at 4.5ghz and sli 670's pulled 430w at the wall in games.
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Not wanting to hijack this thread but i've been getting a lot of differing advice about powering my GTX 770 with a HX520. Plenty of people have said it'll be okay but plenty of others have suggested it won't be. I'd just like consistent advice tbh, for that reason i've ordered a 750w Corsair just-in-case.
 
riskyfrisky said:
Not wanting to hijack this thread but i've been getting a lot of differing advice about powering my GTX 770 with a HX520. Plenty of people have said it'll be okay but plenty of others have suggested it won't be. I'd just like consistent advice tbh, for that reason i've ordered a 750w Corsair just-in-case.
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I recall reading that a stock GTX770 only consume up to around 240-250W, so overclocked may be hitting 270-280W range? Even if your Phenom II X4 was heavily overclocked to 4.00GHz+ using higher vcore of 1.5v and bump the CPU power consumption to say...120W, 280W+120W=400W, and still leave plenty of headroom for other hardware motherboard, ram, fans etc :confused:

Anyway, you really need to look into overclocking your Phenom II X4 3.60GHz higher...as it is, it will bottleneck even a 7850 in lots of games (which ain't well-optimised to use all the 4 cores fully), let alone a GTX770.
 
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You will always see people on these forums suggesting you need uber watt rated PSUs but generally it is rubbish for 99% of us , what you need is a quality PSU.

A GTX 770 is a fairly power hungry card and it will only pull 200w at pretty much maximum the rest of your system will maybe pull another 100 or so making a decent 520 PSU more than enough.

You wasted your money on the 750.
 
Marine-RX179 said:
I recall reading that a stock GTX770 only consume up to around 240-250W, so overclocked may be hitting 270-280W range? Even if your Phenom II X4 was heavily overclocked to 4.00GHz+ using higher vcore of 1.5v and bump the CPU power consumption to say...120W, 280W+120W=400W, and still leave plenty of headroom for other hardware motherboard, ram, fans etc :confused:

Anyway, you really need to look into overclocking your Phenom II X4 3.60GHz higher...as it is, it will bottleneck even a 7850 in lots of games (which ain't well-optimised to use all the 4 cores fully), let alone a GTX770.
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Domi said:
You will always see people on these forums suggesting you need uber watt rated PSUs but generally it is rubbish for 99% of us , what you need is a quality PSU.

A GTX 770 is a fairly power hungry card and it will only pull 200w at pretty much maximum the rest of your system will maybe pull another 100 or so making a decent 520 PSU more than enough.

You wasted your money on the 750.
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Great.

According to EVGA, my version of the GTX 770 consumes a maximum of 250w. Add to that 125w specified by AMD for the CPU and that's 375w. So yes, it does appear as though I wasted money on the 750 PSU.

I will give overclocking a try with the new PSU, see if I can squeeze some extra performance out the CPU. I'd love SLI GTX 770's and the new PSU would allow that too.
 
riskyfrisky said:
I will give overclocking a try with the new PSU, see if I can squeeze some extra performance out the CPU. I'd love SLI GTX 770's and the new PSU would allow that too.
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You best forget about going SLI GTX770 altogether, until you upgrade to a much faster CPU and platform.

You would get far better performance with a overclocked i5 with a single 770 than SLI 770 with your current CPU.
 
Marine-RX179 said:
You best forget about going SLI GTX770 altogether, until you upgrade to a much faster CPU and platform.

You would get far better performance with a overclocked i5 with a single 770 than SLI 770 with your current CPU.
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Oh if I do go SLI then it'll be once I upgrade CPU and mobo for sure. I know there's not long left in my current build.
 
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