power supply

Message boards : Number crunching : power supply

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Author	Message
Paul D Harris Volunteer tester Send message Joined: 1 Dec 99 Posts: 1097 Credit: 25,290,102 RAC: 39,427	Message 1075818 - Posted: 10 Feb 2011, 15:43:30 UTC
	My 650 watt supply failed what should I replace it with. I have an i7 920 cpu with an gtx 460 video card 2 sata hard drives and 1 ide hard drive and 1 ide dvd burner and 1 sata dvd burner and floppy and 2 120mm one has led light fans and 1 90 mm fan with led light and case has an 2 led lights. ____________
	ID: 1075818 ·

arkayn Volunteer tester Send message Joined: 14 May 99 Posts: 3088 Credit: 40,292,670 RAC: 65,436	Message 1075829 - Posted: 10 Feb 2011, 16:24:45 UTC
	I think you were right in the sweet spot with the 650, unless you plan on adding another card. ____________
	ID: 1075829 ·

Mike Volunteer tester Send message Joined: 17 Feb 01 Posts: 19486 Credit: 21,133,279 RAC: 25,692	Message 1075833 - Posted: 10 Feb 2011, 16:41:27 UTC
	I would go with a 750 Watt to be safe for another upgrade. ____________
	ID: 1075833 ·

Robert Ribbeck Send message Joined: 7 Jun 02 Posts: 644 Credit: 5,236,782 RAC: 875	Message 1075834 - Posted: 10 Feb 2011, 16:46:46 UTC
	Just when you replace get a good one not chinese/tiawan Cr...p They are not known for long life or actually putting out what they are rated at ____________
	ID: 1075834 ·

Mike Volunteer tester Send message Joined: 17 Feb 01 Posts: 19486 Credit: 21,133,279 RAC: 25,692	Message 1075843 - Posted: 10 Feb 2011, 17:22:15 UTC
	You never know whats inside. You can buy a mercedes with renault engine soon. But who knows? Sorry for beeing off topic. ____________
	ID: 1075843 ·

Karsten Vinding Volunteer tester Send message Joined: 18 May 99 Posts: 135 Credit: 13,775,263 RAC: 16,109	Message 1075861 - Posted: 10 Feb 2011, 18:00:12 UTC - in response to Message 1075843. Last modified: 10 Feb 2011, 18:00:58 UTC
	Check rewiew sites. JonnyGURU.com, is probably one of the most thorough testers out there right now, and his articles are fun to read. If he recommends a PSU, its good. HardOCP.com are also very thorough in their testings, and have failed many respected PSU's in their testing. When they recommend a PSU its good. Read some of these sites reviews, and you will quickly get an idea of whats good and whats not. Quality is not allways reflected in a high price, and you can also pay a lot of money for something that is basically worthless. ____________
	ID: 1075861 ·

Chris S Volunteer tester Send message Joined: 19 Nov 00 Posts: 22721 Credit: 4,515,043 RAC: 5,688	Message 1075863 - Posted: 10 Feb 2011, 18:03:19 UTC
	Nvidia say your card needs a 450W PSU. Nvidia PSU I would think that an upmarket 650W PSU from the likes of Antec would suffice. ____________ Damsel Rescuer, Kitty Patron, Raccoon Friend, Uli Fan, Julie Supporter, ES99 Admirer, PETA Member, 1st Childhood
	ID: 1075863 ·

phud Send message Joined: 12 Oct 99 Posts: 1319 Credit: 34,994,639 RAC: 0	Message 1075866 - Posted: 10 Feb 2011, 18:09:29 UTC
	this is a handy tool... http://www.thermaltake.outervision.com/ always give yourself some leeway...ie. add another 50 or 100 watts.. better to have more than not enough. ____________
	ID: 1075866 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 18,019,284 RAC: 55,046	Message 1075875 - Posted: 10 Feb 2011, 18:41:47 UTC
	I've always preferred to use http://www.extreme.outervision.com/psucalculator.jsp, which seems like it's from the same domain as Phud's (outervision.com). Many people out there don't seem to realize just how little power they really need, and getting too much can actually be a bad thing. I plugged in the values you gave, and assumed 3 sticks of DDR3 memory. According to eXtreme Power Supply Calculator, you only need 410W of power, and they recommend a 460W power supply. 500W would be fine, 650W is probably overkill.
	ID: 1075875 ·

Robert Ribbeck Send message Joined: 7 Jun 02 Posts: 644 Credit: 5,236,782 RAC: 875	Message 1075892 - Posted: 10 Feb 2011, 19:40:10 UTC - in response to Message 1075875.
	I've always preferred to use http://www.extreme.outervision.com/psucalculator.jsp, which seems like it's from the same domain as Phud's (outervision.com). Many people out there don't seem to realize just how little power they really need, and getting too much can actually be a bad thing. I plugged in the values you gave, and assumed 3 sticks of DDR3 memory. According to eXtreme Power Supply Calculator, you only need 410W of power, and they recommend a 460W power supply. 500W would be fine, 650W is probably overkill. I agree most people don't realize how little their computer really uses but how or were is too much bad ____________
	ID: 1075892 ·

Mike Volunteer tester Send message Joined: 17 Feb 01 Posts: 19486 Credit: 21,133,279 RAC: 25,692	Message 1075916 - Posted: 10 Feb 2011, 20:59:12 UTC - in response to Message 1075875. Last modified: 10 Feb 2011, 21:02:50 UTC
	I've always preferred to use http://www.extreme.outervision.com/psucalculator.jsp, which seems like it's from the same domain as Phud's (outervision.com). Many people out there don't seem to realize just how little power they really need, and getting too much can actually be a bad thing. I plugged in the values you gave, and assumed 3 sticks of DDR3 memory. According to eXtreme Power Supply Calculator, you only need 410W of power, and they recommend a 460W power supply. 500W would be fine, 650W is probably overkill. Sorry but if the rig needs 410 Watts there is only 20 Watts room with a 500 PSU when the PSU is 85% efficiency. You only have to add another hard drive your PSU could fail. I dont talk about OC yet. ____________
	ID: 1075916 ·

skildude Send message Joined: 4 Oct 00 Posts: 8942 Credit: 36,623,234 RAC: 59,997	Message 1075917 - Posted: 10 Feb 2011, 21:02:39 UTC - in response to Message 1075892.
	heh my wimpy puter Recommended PSU Wattage: * 688... good thing I have a 700 watt psu ____________ Proud member of TSWB. End terrorism by building a school
	ID: 1075917 ·

[seti.international] Philip J. Fry Volunteer tester Send message Joined: 6 Apr 07 Posts: 6568 Credit: 50,765,828 RAC: 20,466	Message 1075921 - Posted: 10 Feb 2011, 21:10:52 UTC - in response to Message 1075818.
	My 650 watt supply failed what should I replace it with. I have an i7 920 cpu with an gtx 460 video card 2 sata hard drives and 1 ide hard drive and 1 ide dvd burner and 1 sata dvd burner and floppy and 2 120mm one has led light fans and 1 90 mm fan with led light and case has an 2 led lights. I would guess your i7 920 and all other stuff (except GPU) use ~ 200 to 250 W. Maybe someone could jump in here which have this CPU. http://www.nvidia.com/object/product-geforce-gtx-460-us.html The GTX460 use max ~ 160 W ('power gaming'). If S@h-CUDA ~ 3/4 (experiences @ my GTX260 OCs) = ~ 120 W The PSUs in my machines are used ~ 50 %. I would go with a ~ 750 W PSU. Some say not too big, not too small. Max ~ 85 % usage. And so on.. Corsair say e.g. the best efficiency @ ~ 50 % usage (all series). E.g. the graph of the Pro Series Gold AX750: http://www.corsair.com/media/ax750-efficiency.png. Also then the autom. fan is quietly: http://www.corsair.com/media/ax750-noise.png. Why should Corsair say this, if this isn't true? I guess this increase also the life. ____________ >Das Deutsche Cafe. The German Cafe.<
	ID: 1075921 ·

Cosmic_Ocean Send message Joined: 23 Dec 00 Posts: 2079 Credit: 6,721,707 RAC: 4,646	Message 1075923 - Posted: 10 Feb 2011, 21:26:06 UTC
	Oh wow.. 549w on my 600, supposedly. Was probably a good thing my original 550 died before I added the second CPU and I upgraded to the 600. Now I know for sure that I can't add anything else without an upgrade. I could tell that I was pretty close to the limit, because if I hot-plug a notebook drive.. half the HDDs cycle due to voltage drop on the 5v rail and RAID-5's don't like it when half the disks drop. External hotswap enclosure with its own 300w PSU ftw. ____________ Linux laptop uptime: 1484d 22h 42m Ended due to UPS failure, found 14 hours after the fact
	ID: 1075923 ·

archae86 Send message Joined: 31 Aug 99 Posts: 871 Credit: 1,565,978 RAC: 50	Message 1075935 - Posted: 10 Feb 2011, 22:20:10 UTC - in response to Message 1075875.
	I've always preferred to use http://www.extreme.outervision.com/psucalculator.jsp, which seems like it's from the same domain as Phud's (outervision.com). Many people out there don't seem to realize just how little power they really need, and getting too much can actually be a bad thing. I plugged in the components of my latest system, built around a moderately overclocked Xeon E5620 Westmere with a pretty low-end ATI HD 4550 graphics card and rather light on peripherals, including the actual CPU overclock frequency and voltage. And I dialed up the "system load parameter" from the 90% that site suggests to 100% (BOINC will do that to you on CPU). That calculator suggested my system "minimum PSU wattage" to be 253 watts, and "recommended" to be 303 watts. My kill-a-watt says that when I stop typing for a minute, so the GPU resumes running Raistmer's AP for ATI ap, that I am burning right about 250 watts. So if the interpretation of "minimum PSU wattage" is "actual power burned" it does pretty well. But even though I think a lot of people are advising excessively rated supplies, I think 303 would be skimpier for this system that I'd wish. My actual supply is a Nexus Value 430 rated at 430 watts. I think that is more than generous for my system, and would be pretty happy with anything over about 350 that fit my needs for available plugs, suitable configuration, quite operation, quality capacitors, and a plausible reputation for quality product. I agree that many people buy more supply than they need, and way to many press this on others, but on the single sample of my system, this particular calculator appears to err in the opposite direction. ____________
	ID: 1075935 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 18,019,284 RAC: 55,046	Message 1075947 - Posted: 10 Feb 2011, 22:56:21 UTC - in response to Message 1075892.
	but how or were is too much bad I don't have the time right now to provide you a detailed breakdown, but look up power supply efficiency ratings. You'll see that going under the PSU's half-way mark can actually be a bad thing.
	ID: 1075947 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 18,019,284 RAC: 55,046	Message 1075949 - Posted: 10 Feb 2011, 22:57:45 UTC - in response to Message 1075916. Last modified: 10 Feb 2011, 23:10:19 UTC
	I've always preferred to use http://www.extreme.outervision.com/psucalculator.jsp, which seems like it's from the same domain as Phud's (outervision.com). Many people out there don't seem to realize just how little power they really need, and getting too much can actually be a bad thing. I plugged in the values you gave, and assumed 3 sticks of DDR3 memory. According to eXtreme Power Supply Calculator, you only need 410W of power, and they recommend a 460W power supply. 500W would be fine, 650W is probably overkill. Sorry but if the rig needs 410 Watts there is only 20 Watts room with a 500 PSU when the PSU is 85% efficiency. You only have to add another hard drive your PSU could fail. I dont talk about OC yet. If you wanted to add another hard drive, then you should have plugged that value into the calculator. Same goes for the OC. And I would disagree that adding one hard drive would cause the system to fail. Hard drives don't use up as much power as people think. Go ahead, plug in the values for your system, then change the hard drives to 5 and see how much difference there is. If you want to buy a little headway for a couple upgrades in the future, fine. But you don't need a 750W PSU for a system that is only going to need 500W.
	ID: 1075949 ·

j tramer Send message Joined: 6 Oct 03 Posts: 217 Credit: 4,510,176 RAC: 4,101	Message 1075952 - Posted: 10 Feb 2011, 23:01:36 UTC
	If money is no object? 1000 watts or a nice 750 watts http://www.hardwaresecrets.com/page/power :) weight has alot to do with power supplies...heavier is better....real metal, not air core tramsformers good luck, good reading
	ID: 1075952 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 18,019,284 RAC: 55,046	Message 1075953 - Posted: 10 Feb 2011, 23:03:39 UTC - in response to Message 1075935.
	And I dialed up the "system load parameter" from the 90% that site suggests to 100% (BOINC will do that to you on CPU). Agreed. I did the same for the values I posted earlier for PaulDHarris, and for any system I spec that I know will be running distributed computing. So if the interpretation of "minimum PSU wattage" is "actual power burned" it does pretty well. But even though I think a lot of people are advising excessively rated supplies, I think 303 would be skimpier for this system that I'd wish. My actual supply is a Nexus Value 430 rated at 430 watts. I think that is more than generous for my system, and would be pretty happy with anything over about 350 that fit my needs for available plugs, suitable configuration, quite operation, quality capacitors, and a plausible reputation for quality product. Agreed. I think the values given are only meant as a realistic display so you can buy a PSU that fits your needs with whatever headroom you desire - but hopefully it makes you more conscientious of your purchse without going crazy about it. I agree that many people buy more supply than they need, and way to many press this on others, but on the single sample of my system, this particular calculator appears to err in the opposite direction. Interesting observation, and perhaps it does. I'll have to keep that in mind. Still, I hate seeing people buy 1500W PSUs because of marketing and numbers when they probably only need half that.
	ID: 1075953 ·

VBobier Send message Joined: 30 Nov 03 Posts: 40805 Credit: 32,101,534 RAC: 19,303	Message 1076000 - Posted: 11 Feb 2011, 2:40:46 UTC
	I have an Enermax Revolution85+ 1050w psu in My PC, I have two GTX295 cards in there at present, a WD Black 7200rpm 500GB 2.5" hdd, a WD 10,000rpm 300GB Velociraptor, a DVD/CD ROM drive, an Asus P5K Deluxe P35 Motherboard, 4GB DDR2 1066MHz ram, an Intel QX6700 B1 2.66GHz Quad core cpu(older than any production quad core cpu here), I can install a 3rd hdd with no problem and when I go to the P55 platform(Asus P7P55D Pro, 6GB G.Skill 1600 ram and an i7 860) I may see if I can power 3 GTX295 cards with the 1050w psu in an Antec Fusion Max HTPC case(I'm looking for a part at present that I've lost track of currently), At least until I get My fully water cooled PC built, Then the motherboard will be an EVGA P55 Classified 200 w/the i7 860 cpu with 6GB of G.Skill 2000 ram with 6 GTX295 cards and two psus(Silverstone ST1500 1500w for 4 GTX295 cards and a Thermaltake Toughpower 650w drivebay psu for 2 GTX295 cards) in a modified HAF-932 case with 3-120x360 Radiators(2-swiftech and 1-Coolgate) using either 6 Koolance water blocks for the GTX295 v2 cards(single pcb type[vid-nx295s], Not the older dual type[vid-nx295]) or 4-Koolance and 2-Bitspower blocks for the GTX295 v2 cards, The Koolance blocks are very hard to find and I still need 2 of them of course. The P7P55D will then just be an HTPC/DVR of course. ____________ BSG Anthem My Facebook page
	ID: 1076000 ·

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Message boards : Number crunching : power supply