Help with a new PSU

[Kenton82]

Hi guys, could do with replacing my power supply being that it is 8-9 years old now. The current one is an Fortron Epsilon 1010W. This one has started making a slight whine from the fan - i think, and i dont wanna risk it much longer. I have cruised through the PSU tier list, but need extra help with the power requirements. In two minds at the mo. I really dont know why the one i have is such a high wattage, but i do know its a nasty one! I had been recommended a 650w But i am swaying towards more like a 750W?... Current specs are: Asus Rampage ii Extreme, i7 950 (not O/C'd - BUT may do very soon!) Asus 97 GTX 4GB GPU (O/C potential), 1TB WD HDD, 16GB Ballistix sport RAM, 3x 200mm fans, 1x 120mm fan. Original sound card.
Any advice, greatly appreciated!
Cheers.

 

[Dynomite54]

EVGA SuperNOVA 650 (if its a ATX case) its 80+ Gold and if you want 750 watts there is a 750 model of the SuperNOVA thats 20$ more.

 

[Kenton82]

EVGA SuperNOVA 650 (if its a ATX case) its 80+ Gold and if you want 750 watts there is a 750 model of the SuperNOVA thats 20$ more.

Thanks man, Yeah its an old Coolermaster Haff 922 case. Very good with space and cooling. I will have a look at the EVGA 750w PSU's. Just so it gives me some head room. Any idea why such a large wattage psu was put in this originally??
Cheers for your help mate.

 

[Dynomite54]

EVGA SuperNOVA 650 (if its a ATX case) its 80+ Gold and if you want 750 watts there is a 750 model of the SuperNOVA thats 20$ more.

Thanks man, Yeah its an old Coolermaster Haff 922 case. Very good with space and cooling. I will have a look at the EVGA 750w PSU's. Just so it gives me some head room. Any idea why such a large wattage psu was put in this originally??
Cheers for your help mate.

I have no idea why it has so much wattage. On the old amazon page it said it was for servers.

 

[raisonjohn]

Your i7-950, having a TDP of 130W, would consume *roughly* 130W, non-OC'd (for the CPU only). Tests made by bit-tech shows that total system power (entire rig) when the i7-950 is stressed is at 233W (non-OC, 3.06GHz) up to a high of 383W (OC'd to 4.3GHz). https://www.bit-tech.net/hardware/cpus/2010/11/10/intel-core-i7-950-review/7

For your Asus GTX 970 OC 4GB, test made by techpowerup shows that the power draw (GPU only and not including other components) is at 161W (average) to 179W (peak). https://www.techpowerup.com/reviews/ASUS/GTX_970_STRIX_OC/23.html

So, theoretically, you may be looking at a maximum (worst-case scenario) total system power draw of 233W + 179W = 412W (when non-OC'd) up to 383W + 179W = 562W (when OC'd).

Getting a ~650W continuous power on a +12V rail puts your rig on a 60% to 86% power draw from the PSU (at those worst-case scenarios). Getting a ~750W continuous power, puts it on a 55% to 75% power draw (at those worst-case scenarios). Typical/average non-stress use of the rig, of course, puts the draw lower than the above values.

If you want EVGA, I'd suggest getting the SuperNOVA G3 or G2 series (not the G1).

 

[Kenton82]

Your i7-950, having a TDP of 130W, would consume *roughly* 130W, non-OC'd (for the CPU only). Tests made by bit-tech shows that total system power (entire rig) when the i7-950 is stressed is at 233W (non-OC, 3.06GHz) up to a high of 383W (OC'd to 4.3GHz). https://www.bit-tech.net/hardware/cpus/2010/11/10/intel-core-i7-950-review/7

For your Asus GTX 970 OC 4GB, test made by techpowerup shows that the power draw (GPU only and not including other components) is at 161W (average) to 179W (peak). https://www.techpowerup.com/reviews/ASUS/GTX_970_STRIX_OC/23.html

So, theoretically, you may be looking at a maximum (worst-case scenario) total system power draw of 233W + 179W = 412W (when non-OC'd) up to 383W + 179W = 562W (when OC'd).

Getting a ~650W continuous power on a +12V rail puts your rig on a 60% to 86% power draw from the PSU (at those worst-case scenarios). Getting a ~750W continuous power, puts it on a 55% to 75% power draw (at those worst-case scenarios). Typical/average non-stress use of the rig, of course, puts the draw lower than the above values.

If you want EVGA, I'd suggest getting the SuperNOVA G3 or G2 series (not the G1).

Hi john, Many thanks for the in-depth technical response to my question! That puts things in real perspective. To see it all broken down like that really makes sense, and is gonna save me some money too.
I am not a noob with pc's by any means, but some of the technicalities have me stumped sometimes. Since i have been on this forum (maybe a couple of months now) I have had some fantastic help from people, and it never ceases to amaze me what lengths people will go to, not just with answers, but with their explanations.
Many thanks for your time - (all of you),
Kenton