Upgrade CX-750M?

[Schrodingers Kat]

Hey guys, system is in my sig but basically with my cpu at 4.6 @1.4v and my gpu overvolted my system draws about 700W at full load. The problem is its routinely over 30 degrees where i live (northern australia) and from the jonnyguru review of my psu it doesnt like going over 30. I have good cooling for the tower but not so much for the basement. It hasn't failed me yet although i haven't run the overclocks in summer yet and i want to keep the performance i get. Should i replace my still working cx750m with something like the evga g2 850w? Cheers for any advice

[Skiiwee29]

If your pushing near the limits of your power draw, then you may want to look even higher than 850w for the proper efficiency rating to work correctly. 

 

http://www.anandtech.com/show/2624/3

 

Here is a great article explaining how the PSU efficiency is actually calculated and where you need to be to actually achieve that proper rating per wattage. 

 

@STRMfrmXMN has a good PSU list in the thread linked in my signature. If your pushing 700w at peak usage, you may want to look into a 900+ watt to actually gain maximum efficiency based on my understanding from the article. 

[GirlFromYonder]

25 minutes ago, Schrodingers Kat said:

Hey guys, system is in my sig but basically with my cpu at 4.6 @1.4v and my gpu overvolted my system draws about 700W at full load. The problem is its routinely over 30 degrees where i live (northern australia) and from the jonnyguru review of my psu it doesnt like going over 30. I have good cooling for the tower but not so much for the basement. It hasn't failed me yet although i haven't run the overclocks in summer yet and i want to keep the performance i get. Should i replace my still working cx750m with something like the evga g2 850w? Cheers for any advice

yes a g2 850 would be fine

[TheRandomness]

What graphics card and CPU do you have..? And whilst I'm asking, what're your full specs?

[GirlFromYonder]

Just now, TheRandomness said:

What graphics card and CPU do you have..? And whilst I'm asking, what're your full specs?

in his sig

[Schrodingers Kat]

23 minutes ago, legacy99 said:

If your pushing near the limits of your power draw, then you may want to look even higher than 850w for the proper efficiency rating to work correctly. 

 

http://www.anandtech.com/show/2624/3

 

Here is a great article explaining how the PSU efficiency is actually calculated and where you need to be to actually achieve that proper rating per wattage. 

 

@STRMfrmXMN has a good PSU list in the thread linked in my signature. If your pushing 700w at peak usage, you may want to look into a 900+ watt to actually gain maximum efficiency based on my understanding from the article. 

 

3 minutes ago, DeezNoNos said:

yes a g2 850 would be fine

The g2 850 still has an efficiency of 88% even at 700W load, which is only down from 91 ish percent at peak efficiency so it should be ok. In the future nothing will need the power that these 250W gpus need when overclocked lol. Might get the evga psu it is a good one i hear. Just sucks because the cx750m is only a year old and working fine, noisy fan but fine 

[Skiiwee29]

the G2 is one of the best. i have the 750w version in my system. 

[TheRandomness]

7 minutes ago, DeezNoNos said:

in his sig

How the fuck is he drawing 700W with a 980Ti and a 6600k?

[GirlFromYonder]

Just now, TheRandomness said:

How the fuck is he drawing 700W with a 980Ti and a 6600k?

maybe overvolt or he measured from the wall or mistook the tdp

[TheRandomness]

Just now, DeezNoNos said:

maybe overvolt or he measured from the wall or mistook the tdp

Pretty sure he's reading the TDPs, because he should be drawing 600W MAX. Overvolting might work, if it was 1.46V on the GPU c;

[Schrodingers Kat]

5 minutes ago, TheRandomness said:

How the fuck is he drawing 700W with a 980Ti and a 6600k?

980ti overvolted AND maxed power limit (110%) giving me over 1500mhz boost takes up way more than it should, pretty sure its going overspec on the psu (hopefully not the pcie slot like some red cards recently...) in addition to cpu overvolted to 1.4 - 1.45v gets me pretty close. the 697W load was a peak figure i got when civ 5 was running at 1900fps but actually in a use case scenario, not under synthetic shit. Im not sure how its so high, but it does give out a ton of heat so figuring its not too inaccurate 

[TheRandomness]

Just now, Schrodingers Kat said:

980ti overvolted with maxed power limit (110%) giving me over 1500mhz boost takes up way more than it should, pretty sure its going overspec on the psu (hopefully not the pcie slot like some red cards recently...) in addition to cpu overvolted to 1.4 - 1.45v gets me pretty close. the 697W load was a peak figure i got when civ 5 was running at 1900fps but actually in a use case scenario, not under synthetic shit. Im not sure how its so high, but it does out out a ton of heat so figuring its not too inaccurate 

With my 290 at +400% power limit and with 1.46V at 1190/1632 it pulls almost 450W so I guess that'd make sense..

[GirlFromYonder]

4 minutes ago, TheRandomness said:

With my 290 at +400% power limit and with 1.46V at 1190/1632 it pulls almost 450W so I guess that'd make sense..

who did u get that +400 limit.

[Schrodingers Kat]

4 minutes ago, TheRandomness said:

With my 290 at +400% power limit and with 1.46V at 1190/1632 it pulls almost 450W so I guess that'd make sense..

Even if its +-50W its still over what my current psu apparently can handle at high temps (jonnyguru says its pretty much a 650w psu with a different sticker smh :/) so the psu upgrade is probably worth it anyway. Not to mention the fans getting louder than it used to be after only a year (gotta love the heat over here) so the eco mode of the evga g2 would be a nice addition. Also should see me through for when i get a 6700k and push that even further than the 6600k and it needs more power

 

Also +400%? fuck that

[TheRandomness]

1 minute ago, DeezNoNos said:

who did u get that +400 limit.

Where*

HIS iTurbo. 

[GirlFromYonder]

1 minute ago, TheRandomness said:

Where*

HIS iTurbo. 

thx and can a r9 380 handle that without blowing up

[manikyath]

guessing that's a green label cx? yeah.. probably wanna replace that.

 

in terms of what to get:

- as said before, evga's G2 should be a pretty solid choice

- there's some other evga models as well to consider (i dont follow evga enough to remember them all)

- corsair's RMi, RMx, AX, AXi, HX, and HXi series are pretty solid choices as well, but vary widely in price between regions.

- especially the more fancy models of seasonic are way up there as well

[TheRandomness]

5 minutes ago, DeezNoNos said:

thx and can a r9 380 handle that without blowing up

+400% power limit just means it can draw 400% more than it normally would. 

[GirlFromYonder]

Just now, TheRandomness said:

+400% power limit just means it can draw 400% more than it normally would. 

which means more overclocks

[TheRandomness]

4 minutes ago, DeezNoNos said:

which means more overclocks

Kindof. You'd still need to add voltage, which is why I modded the BIOS of my 290 to give it 1.46V at full load. 

[GirlFromYonder]

1 minute ago, TheRandomness said:

Kindof. You'd still need to add voltage, which is why I modded the BIOS of my 290 to give it 1.46V at full load. 

wont it blow up. I would do that to my r9 380 but....

[Schrodingers Kat]

6 minutes ago, manikyath said:

guessing that's a green label cx? yeah.. probably wanna replace that.

 

in terms of what to get:

- as said before, evga's G2 should be a pretty solid choice

- there's some other evga models as well to consider (i dont follow evga enough to remember them all)

- corsair's RMi, RMx, AX, AXi, HX, and HXi series are pretty solid choices as well, but vary widely in price between regions.

- especially the more fancy models of seasonic are way up there as well

The corsair line up looks good, but here in aus its just not competitive in pricing compared to the evga g2 line, talking a $50+ difference at most retailers. Seasonic's good models aren't available from major retailers here either lol so it was corsair cx or cs series (which i didnt read enough about and bought a year ago) or the evga bronze and g2 line. Its going to be such a pain to change a psu with my giant noctua d15 cpu cooler not to mention having the spare cx unit just sitting in a box collecting dust, but its probably worth it as the g2 has a 10 year warranty and i wont need to change it for probably that entire time, or until i get a new case.

[TheRandomness]

4 minutes ago, DeezNoNos said:

wont it blow up. I would do that to my r9 380 but....

I did watercool my 290 and essentially melt apart the cooler to keep it cool.. The VRMs stay sub 90 degrees which is fine and the GPU stays at sub 70 at stock..

[GirlFromYonder]

13 minutes ago, TheRandomness said:

I did watercool my 290 and essentially melt apart the cooler to keep it cool.. The VRMs stay sub 90 degrees which is fine and the GPU stays at sub 70 at stock..

ok

[STRMfrmXMN]

7 hours ago, Schrodingers Kat said:

980ti overvolted AND maxed power limit (110%) giving me over 1500mhz boost takes up way more than it should, pretty sure its going overspec on the psu (hopefully not the pcie slot like some red cards recently...) in addition to cpu overvolted to 1.4 - 1.45v gets me pretty close. the 697W load was a peak figure i got when civ 5 was running at 1900fps but actually in a use case scenario, not under synthetic shit. Im not sure how its so high, but it does give out a ton of heat so figuring its not too inaccurate 

There's literally no bounds of science that will get an i5 and 980ti to 600W, while two 980tis in SLI with a 4790k use around 550W, whatever you were using to measure power draw had an issue somewhere, likely being that you either measured through a multi socket surge protector with other things like monitors plugged in or that, with a roughly 83% efficiency PSU you're wasting around 150W at the wall which is far more plausible. Nonetheless, an EVGA 650G2 is enough for your single 980ti and 850W is enough for two.