850W PSU good enough?

bailojustin · Mar 7, 2015

Hi im looking for some help, right now im experiencing a few issues with my current setup
My PSU is a 850W Silent Pro
I am using the 790i Ultra 3 Way Sli
QX6700 Kentsfield Quad-Core 2.66GHz
I have 2x4 hyperx kingstone 1600 MHZ

and I have 2 SLI TwinFrozr OC GeForce GTX 275 896MB GDDR3 SLI Support Video Card

I cant turn on my sli my computer starts to artifact and tear, I have no idea whats going on, maybe the power supply? I am not sure, its occasional blue screen and whenever I play games it crashes during the games.

I checked out all the TEMPS for the for the (MCP(North Bridge) and SSP(South Bridge) nForce 790I Ultra chipset) as expected they IDLE at 80+C and under load I have seen them reach 102C. I'm not sure if my PSU cant supply the cards with enough power so its pulling the extra required power through the Mobo.

ALSO I have cleaned every single fan very well, I took off the heat sink covering the north/south bridge and reapplied thermal paste, as well as to the CPU. It lowered it to idling at 75-85.

Temperatures are extremely high and I know the setup i have cant be too bad, I just need help finding out whats wrong with it.

laviniuc · Mar 7, 2015

do you have good airflow in the case? those temps do sound too high.

i7Baby · Mar 7, 2015

For 2 SLI TwinFrozr OC GeForce GTX 275 you need 750W from a good quality power supply - from tiers 1 or 2 of http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html#xtor=EPR-8886

What tier is " 850W Silent Pro"? What make is it?

bailojustin · Mar 7, 2015

The power supply exactly is Cooler Master Silent Pro M2 850W ATX 850 Power Supply RS850-SPM2D3-US

And yes I have a closed case with positive air pressure and custom , I have 4 SilverStone Air Penetrator Air Channeling Case Fan 140mm/1500rpm as well as the exauhst from the PSU is vented through the bottom.

Edit: and also I have read places that if the psu is not working as intended the graphics cards will pull the rest of required energy melting all my components, possibly why my mcp and ssp are so high, aside from all the problems with the 790i

laviniuc · Mar 7, 2015

it's easy to test if the psu is the issue, run the system with only one card. see if that makes any difference. how old is the psu? it's not a very bad psu so that shouldn't be the problem

i7Baby · Mar 7, 2015

It's tier 3. Not great. But OK. With the 100W overhead. It should be fine for your SLI.

bailojustin · Mar 7, 2015

The SLI is so terrible, I cant even activate it, and the graphics themselves, for 1 I should be able to play World of Warcraft maxed fine,considering a year ago I could and I cant even play it on ultra without lag, Or H1z1 without tremendous lag.
I have them well spaced apart, both in the 2.0 pci, and the cards run on avg from 40-70C but I dont know if that is accurate because I am not sure why one is even functioning if I do not have SLI enabled.

bailojustin · Mar 7, 2015

The PSU is only maybe 3 years old since I have gotten it, and its been extremely well taken care of. Along with all the other components in the computer.

Honestly please anyone, I have been searhing for answers to this mystery for months, I just want to know why my MCP and SSP are cooking my computer alive, and ill state again, its ALWAYS 70-85 Idle, 85+ when under load.

i7Baby · Mar 7, 2015

"MCP and SSP"?

Your CPU should idle at 40C max and get to 60C max gaming. Blow out the case with compressed air to get rid of dust. Boost the CPU fan speed to 1500rpm. Get rid of any overclcok.

If that doesn't help then re-seat the cooler - apply new thermal paste. If that still doesn't work then time to look at a better cpu cooler.

bailojustin · Mar 7, 2015

i7Baby :

Edit: I Have an extremely efficient CPU cooler already attatchedd to it. "DeepCool Dual Fan CPU Cooler Heatsink"

I have already Reseated the entire North(mcp) and South(ssp) Bridges, with high quality thermal paste, aswell as the CPU itself. The CPU temps are fine sometimes they get up to 50-60.

I clean my case regularly and I also make sure that I keep a Positive Air Case pressure with the correct fan filters to ensure there is no dust or particulate build up. My fans are at at max when I am Gaming, the MCP dedicated fan is always running full blast/

laviniuc · Mar 7, 2015

bailojustin :

it will work with just one of them, why wouldn't it? point is to see if the reduced power requirement fixes the temps, if it's the psu at fault it should.

i7Baby · Mar 7, 2015

bailojustin :

i7Baby :

Edit: I Have an extremely efficient CPU cooler already attatchedd to it. "DeepCool Dual Fan CPU Cooler Heatsink"

I have already Reseated the entire North(mcp) and South(ssp) Bridges, with high quality thermal paste, aswell as the CPU itself. The CPU temps are fine sometimes they get up to 50-60.

I clean my case regularly and I also make sure that I keep a Positive Air Case pressure with the correct fan filters to ensure there is no dust or particulate build up. My fans are at at max when I am Gaming, the MCP dedicated fan is always running full blast/

You said "as expected they IDLE at 80+C and under load I have seen them reach 102C"

bailojustin · Mar 7, 2015

i7Baby :

Yes, from the moment my computer is on the MCP and SSP which is NForce 790I Ultra Chipset for the north and south bridge that overheats, It is the one constantly in the danger zone and above 80C when it goes up towards the 100C range the CPU temp does tend to follow increasing in a few degrees Celcius but not enough to worry about.

i7Baby · Mar 7, 2015

Then your temps are OK. And your power supply.

Howe are you measuring the temps?

bailojustin · Mar 7, 2015

i7Baby :

To measure and confirm the tempatures of my motherboard I have tried various programs from Speccy, to aida64 and many more including my BIOS, I also have a Digital infrared temperature gun which i can aim directly at the heatsinks and areas of causes to confirm that they are indeed 85C-105C

I wish i had more information I could give you, I know quite a bit myself but this is something I cant figure out and I need the help of all you experts. Thanks

i7Baby · Mar 7, 2015

"I cant turn on my sli my computer starts to artifact and tear" - what applications? What monitor?

bailojustin · Mar 7, 2015

Okay so my computer runs terrible without sli, but when I turn it on the second I go into a game I get cross colors, looks like a quilt of glitches, and it's when I try to sli with wow, dragon ag3, skyrim, league of legends constantly crashes due to unexpected drive errors, all my drives are 100% up to date.

And as far as the monitors go, I have multi support, I have 2 extended displays, all of them are 60hz, 5 ms refresh and 1600x900

laviniuc · Mar 7, 2015

without sli it should be slower but not by much. something else must be amiss.

i7Baby · Mar 7, 2015

Not all games support SLI.

bailojustin · Mar 7, 2015

i7Baby :

I love gaming so I have a mass collection, even the games that support SLI cant handle it. It is so bad that I end up getting constant blue screen and crashed with sli enabled even at the aero desktop. My CPU, I feel like it is good enough but I dont know what it is thats causing it, the power supply, the cpu, the ram sticks, and the worst part is its not overclocked.

bailojustin · Mar 7, 2015

Since my Motherboard idles at 80c-100c is anyone aware of any problems, permanent damage that could have been a result from that, Like possibly crippling my computer so it performs but nowhere near as good as it should.

ps this is off topic, what are the the 2 pins connected to each graphics card for, they are randomly somewhere on it, is this for lab testing or diagnostics?

i7Baby · Mar 8, 2015

VRM's can get that hot. Have you got good heat sinks on the mobo? Most these days also have a built in fan.

2pins? Can't see anything on the spec - http://au.msi.com/product/vga/N275GTX_Twin_Frozr_OC.html#hero-overview

bailojustin · Mar 8, 2015

i7Baby :

Ok yea I have a picture of the 2 pins, and I also have a picture of the exact heatsink that covers the north and south bridge.
Is there any place i can buy a new bigger and better heatsink. It just has to be minimal size so the gpu does not get in the way.

http://archive.benchmarkreviews.com/images/reviews/video_cards/msi_geforce_gtx_275/MSI_N275GTX_PCIe_1.jpg
2 pins located next to 6-pin

http://www.ixbt.com/mainboard/xfx/nforce-790i-ultra-3-way-sli/chipset-cooling.jpg

Heatsink on Mobo with the fan that comes with it
http://www.iamxtreme.net/andre/EVGA-790iU/1.JPG

Is there any exact way to tell where the issue is in the motherboard, testing voltages between connections, something, anything. 80C+ im pretty much guessing my mobo is already fried, just a crippled motherboard now, and if I get another MB will the same issue possibly happen again meaning it was not the MB.
the Heatsink does have a small fan located on it next to the fan powersupply. from what i can tell, I think i need about 15 more.

i7Baby · Mar 8, 2015

Looks like a sensor port. Didn't come up in the card overview.

And I can't find any mention in a review - http://hexus.net/tech/reviews/graphics/19126-msi-n275gtx-twin-frozr-oc-raising-bar-nvidias-geforce-gtx-275/?page=11

Weird looking heatsink. Huge!. Maybe check if the thermal paste has dried out and needs replacing.

bailojustin · Mar 8, 2015

i7Baby :

I did completely remove the heatsink, cleaned it very well, primed both the chips and sinks with the paste before reattaching to assure good heat transfer.

It is very large but am almost to the point where i am going to completely remove it and replace it with custom North and south bridge chipset coolers.

850W PSU good enough?

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