I wouldn't be so sure that an 850w PSU is enough for two GTX 295's. The only certified SLI PSU's for that card are all 1200w. I'm not saying you need that much, 850w might be cutting it close.
Need Help: SLI GTX 295's crashing...
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I agree with this, although it's not the cheapest route to replace. I would test some other things before I went that route. Good luck, and I hope it's not the PSU.
Originally Posted by losttsol  I wouldn't be so sure that an 850w PSU is enough for two GTX 295's. The only certified SLI PSU's for that card are all 1200w. I'm not saying you need that much, 850w might be cutting it close. |
Oneluvballer21, I'm also putting in my vote for a new PSU. Wattage wise...well it's hard to say. EVGA advertises the 295 GTX at 289W full load. Put two of those together and you still should have some room but you also have two hard drives and a quad core. Also the Turbo Cool 850 has a 12volt amperage rating of 54amps. EVGA recommends that your PSU have a 12volt amperage rating of 46amps. This is with total system power. I'm sure with one card you are within those specifications but when you add that second card in all of that goes up.
Good luck buddy
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Good luck buddy
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Couldn't have said it better.
Originally Posted by ShaveWithALightsaber DEFINITELY the PSU. if u can afford 2 295s u should get a 1000W PSU. |
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I wouldn't call these people "noobs"
And yes it could still be his PSU, He is cutting it close on the 12v rails.
Originally Posted by DeadSkull Its not the psu, noobs. Full load two gtx 295s only pull 300W by themselves. See this as well for gtx 295 system load. Im betting OPs problem is with leftover older drivers. Do a complete OS reinstall, install one card then install nv drivers then plug in second card. |
And yes it could still be his PSU, He is cutting it close on the 12v rails.
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I don't know where you get those figures but they're wrong, 1 x GTX295 pulls around 280W on it's own. Even with one card Nvidia recommend a 680W PSU.
Originally Posted by DeadSkull Its not the psu, noobs. Full load two gtx 295s only pull 300W by themselves. See this as well for gtx 295 system load. Im betting OPs problem is with leftover older drivers. Do a complete OS reinstall, install one card then install nv drivers then plug in second card. |
I don't know where you get those figures but they're wrong, 1 x GTX295 pulls around 280W on it's own. Even with one card Nvidia recommend a 680W PSU.
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1 GTX 295 + system pulls that much on its own lol.
Heres power consumption numbers for 4870x2 crossfirex which should consume more power then gtx 295 quad sli.
I'm pretty sure OPs problem is not psu, since hes got a quality PC P&C 860W.
/edit wait a minute, op is trying to run 2 x gtx 295 on a 2 year old psu? Apoligies to whoever I insulted, should've looked at ops rig more carefully, I assumed he had a different psu.
Originally Posted by iampoor I wouldn't call these people "noobs" And yes it could still be his PSU, He is cutting it close on the 12v rails. |
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Originally Posted by orbiter I don't know where you get those figures but they're wrong, 1 x GTX295 pulls around 280W on it's own. Even with one card Nvidia recommend a 680W PSU. |
Heres power consumption numbers for 4870x2 crossfirex which should consume more power then gtx 295 quad sli.
I'm pretty sure OPs problem is not psu, since hes got a quality PC P&C 860W.
/edit wait a minute, op is trying to run 2 x gtx 295 on a 2 year old psu? Apoligies to whoever I insulted, should've looked at ops rig more carefully, I assumed he had a different psu.
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DeadSkull, that is interesting. I wonder why Evga advertises the card using close to 300 watts (289w to be exact)
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The total system power results from your first link look extremely low. At full load, total system power is only 169 watts. That just doesn't seem right. Bit-tech has some different numbers here.
All though I still don't believe 54amps is enough for two cards, two hard drives and a quad core.
Oneluvballer21, you wouldn't happen to have a device that allows you to monitor power draw (wattage/amperage) during idle and load would you?
Good luck
Originally Posted by DeadSkull Its not the psu. At full load two gtx 295s only pull 300W by themselves. See this as well for gtx 295 system load. |
The total system power results from your first link look extremely low. At full load, total system power is only 169 watts. That just doesn't seem right. Bit-tech has some different numbers here.
All though I still don't believe 54amps is enough for two cards, two hard drives and a quad core.
Oneluvballer21, you wouldn't happen to have a device that allows you to monitor power draw (wattage/amperage) during idle and load would you?
Good luck
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I'm not sure how but [H] is using a new testing methodology in which they completely isolate gpu power consumption. Thats why I provided other two links for comparison of gpu to system+gpu power consumption.
As to why Evga and Nvidia recommend high wattage psus I don't know, but my guess would be to make sure that even people trying to save money by buying low quality psus still get ones that are sufficient.
In ops case thought I'm doubting the ability of his 2-3 year old 850W PC P&C ability to handle two GTX 295s.
Originally Posted by thlnk3r DeadSkull, that is interesting. I wonder why Evga advertises the card using close to 300 watts (289w to be exact)
The total system power results from your first link look extremely low. At full load, total system power is only 169 watts. That just doesn't seem right. Bit-tech has some different numbers here. All though I still don't believe 54amps is enough for two cards, two hard drives and a quad core. Oneluvballer21, you wouldn't happen to have a device that allows you to monitor power draw (wattage/amperage) during idle and load would you? Good luck |
As to why Evga and Nvidia recommend high wattage psus I don't know, but my guess would be to make sure that even people trying to save money by buying low quality psus still get ones that are sufficient.
In ops case thought I'm doubting the ability of his 2-3 year old 850W PC P&C ability to handle two GTX 295s.
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DeadSkull why you lol? System power consumption Load (second chart) on the Page YOU quoted...Shows a 394w load with 1x GTX295. Also note that the test system has only 1 HDD, and a minimal overcock.
Edit :- Fully loaded, My system uses around 580W max.
Originally Posted by DeadSkull 1 GTX 295 + system pulls that much on its own lol. |
Edit :- Fully loaded, My system uses around 580W max.
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Sorry about that, I guess I shouldn't jump to conclusions when Im tired and sleep deprived.
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Originally Posted by orbiter DeadSkull why you lol? System power consumption Load (second chart) on the Page YOU quoted...Shows a 394w load with 1x GTX295. Also note that the test system has only 1 HDD, and a minimal overcock. Edit :- Fully loaded, My system uses around 580W max. |
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