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Windows 7: What PSU Do You Recommend and Use for Sli?

27 Oct 2018   #1
logo897

Windows 7
 
 
What PSU Do You Recommend and Use for Sli?

Hi all, just got a Dell Optiplex 790 computer, put it in a custom case and now have a gtx 1080 along with it. I notice my motherboard has 2 GPU slots, so that catches my attention. However, I have a 600 watt psu. Will this be enough for 2 1080's?

My PSU is a corsair cx 600m

pc specs are:

i3 2120
4gb ddr3 (want to go to 8 soon)
1tb HDD western digital blue
cx 600m PSU (600 watts)
1 gtx 1080

And 2 case fans connected through my PSU Molex connector.

Thanks!


My System SpecsSystem Spec
.
27 Oct 2018   #2
logo897

Windows 7
 
 

Also what psu do you use for your sli setup?
My System SpecsSystem Spec
27 Oct 2018   #3
logo897

Windows 7
 
 

I should also note that I do not plan on upgrading my cpu soon, as I am using this PC as a GPU cruncher for BOINC. I do not game that much at all.
My System SpecsSystem Spec
.

28 Oct 2018   #4
F22 Simpilot

Windows 7 Ultimate x64
 
 

It doesn't look like the Optiplex 790 is SLI or Crossfire capable. And even if it was, your CPU would be a bottleneck I'm sure.

If you need to figure out watt requirements use a good online PSU calculator like this one: Power Supply Calculator - PSU Calculator | OuterVision

Make sure you select SLI.

Name brand PSUs like Cooler Master, Corsair, Thermaltake, or Antec make a decent PSU. I prefer Antec myself. I've owned two and none have failed me yet. You might want to go modular so that you only use the power cables you need to keep the inside of the case clean and neat. But it's not a requirement. You'll often see PSUs rated with a metallic rating like gold or platinum, etc. I've read there's very little difference between those ratings and their so-called efficiency status. Just like EnergyStar, but that's a whole other subject. And I'm sure anything that advertises "green this or that" crap is just another marketing ploy.

Replace your PSU at least every 7 years. Good quality models would probably last at least 10 years and that's what a lot of good PSU manufacturers are offering as a warranty period. A PSU is the heart of the system and if it goes out it could take the whole computer with it. I'd also invest in a good UPS so that a power failure doesn't mess with the Comp. I own this particular model, and I chose that one after asking the company if it would be compatible with an active PSU. Which it is. Many UPSs aren't active PSU compatible. So don't make that mistake and shoot the company an email to be sure.

Don't make the mistake of getting a 1000 watt beast for something that only needs about 500 watts. Many people do this. Newegg.com usually lists the watt requirement of a GPU, so you can plug that into the PSU calculator.

If you really want to go SLI, I'd build a cheap Comp. that allows it. Check out pcpartmaker.com and focus on a micro motherboard for cost savings. For your crunching I'm sure you could get by with LGA 1151 and Windows 7. Like an i5 6600k or i7 6700k. I bought my i5 on eBay for around $190 if you can believe it. Since it's rare that there are issues with CPUs, an eBay CPU purchases shouldn't be all that risky. But read the seller feedback, and the auction description well. YMMV. Motherboards on the other hand can be iffy and I would be hesitant on buying an used MOBO on eBay. Unless it's brand new in the box.
My System SpecsSystem Spec
28 Oct 2018   #5
logo897

Windows 7
 
 

Quote   Quote: Originally Posted by F22 Simpilot View Post
It doesn't look like the Optiplex 790 is SLI or Crossfire capable. And even if it was, your CPU would be a bottleneck I'm sure.

If you need to figure out watt requirements use a good online PSU calculator like this one: Power Supply Calculator - PSU Calculator | OuterVision

Make sure you select SLI.

Name brand PSUs like Cooler Master, Corsair, Thermaltake, or Antec make a decent PSU. I prefer Antec myself. I've owned two and none have failed me yet. You might want to go modular so that you only use the power cables you need to keep the inside of the case clean and neat. But it's not a requirement. You'll often see PSUs rated with a metallic rating like gold or platinum, etc. I've read there's very little difference between those ratings and their so-called efficiency status. Just like EnergyStar, but that's a whole other subject. And I'm sure anything that advertises "green this or that" crap is just another marketing ploy.

Replace your PSU at least every 7 years. Good quality models would probably last at least 10 years and that's what a lot of good PSU manufacturers are offering as a warranty period. A PSU is the heart of the system and if it goes out it could take the whole computer with it. I'd also invest in a good UPS so that a power failure doesn't mess with the Comp. I own this particular model, and I chose that one after asking the company if it would be compatible with an active PSU. Which it is. Many UPSs aren't active PSU compatible. So don't make that mistake and shoot the company an email to be sure.

Don't make the mistake of getting a 1000 watt beast for something that only needs about 500 watts. Many people do this. Newegg.com usually lists the watt requirement of a GPU, so you can plug that into the PSU calculator.

If you really want to go SLI, I'd build a cheap Comp. that allows it. Check out pcpartmaker.com and focus on a micro motherboard for cost savings. For your crunching I'm sure you could get by with LGA 1151 and Windows 7. Like an i5 6600k or i7 6700k. I bought my i5 on eBay for around $190 if you can believe it. Since it's rare that there are issues with CPUs, an eBay CPU purchases shouldn't be all that risky. But read the seller feedback, and the auction description well. YMMV. Motherboards on the other hand can be iffy and I would be hesitant on buying an used MOBO on eBay. Unless it's brand new in the box.
I might be better off just getting this

Dell Optiplex 7010 Mid-Tower PC: i7-3770@3.4GHz - 8GB - 500GB HDD Windows 7 Pro | eBay

It's a bit older but it's less than the price of these single, newer cpu's. All I'd have to do would be get a new psu and a mini gtx 1070 most likely. Not sure if I'd be comfortable building a whole PC. I've done so before and broken it...

Given the price of these dells I'm pretty impressed. But I'm curious as to what your thoughts are on this?

Guess I just won't do sli since I just found out my project doesn't support it anyways.
My System SpecsSystem Spec
28 Oct 2018   #6
F22 Simpilot

Windows 7 Ultimate x64
 
 

You don't need a mini 1070. That computer looks like it take your current 1080. Use the top blue slot.

You can reuse your Corsair PSU.
My System SpecsSystem Spec
29 Oct 2018   #7
logo897

Windows 7
 
 

Quote   Quote: Originally Posted by F22 Simpilot View Post
You don't need a mini 1070. That computer looks like it take your current 1080. Use the top blue slot.

You can reuse your Corsair PSU.

Okay, I will ask the seller just in case because I thought the gpu would fit into my optiplex 790, but it didn't.
My System SpecsSystem Spec
30 Oct 2018   #8
F22 Simpilot

Windows 7 Ultimate x64
 
 

Well there are many versions of the optiplex 790. If it's not the tower version then of course it won't fit.
My System SpecsSystem Spec
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 What PSU Do You Recommend and Use for Sli?




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