EPTI entered my build (based on an i5-750 overclocked to 3.5 ghz with 1.4 voltage [more than in reality] and a 5850), and it says that I only need a 350 watt power supply, some previous advice in this thread or elsewhere said that an i5-750 and a 5850 could use almost 400 W or more on its own, I guess my question is how accurate are these calculators?
Post your Rig [Will it run SC2? - Page 72
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KOFgokuon
United States14902 Posts
I entered my build (based on an i5-750 overclocked to 3.5 ghz with 1.4 voltage [more than in reality] and a 5850), and it says that I only need a 350 watt power supply, some previous advice in this thread or elsewhere said that an i5-750 and a 5850 could use almost 400 W or more on its own, I guess my question is how accurate are these calculators? | ||
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FragKrag
United States11554 Posts
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semantics
10040 Posts
You realize that the psu is most effectiveness at like 60% usage and so that where i'd aim for 90% of your usage because outside of a benchmark the gpu will never be under 100% actual draw all the way same as a cpu in games for the most part so you just have to worry about peak usage and you're solid. | ||
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FragKrag
United States11554 Posts
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ghermination
United States2851 Posts
On January 24 2010 16:17 FragKrag wrote: yeah but those spikes in power are what mess up the power supply usage Actually, not really. If a power supply under normal gaming runs at, say, 80% usage, (and i'll use a 4870 since i remember it's power draw off the top of my head) this would draw roughly 120 watts of power. When it moves up to 100% in synthetic benchmarks, getting up to around a peak power draw of 160 watts or so, this doesn't make much of a difference for the system power load, at least in wattage. You will only have problems with power overdraws and freezes etc if your power supply is severely under specifications. For example, when i first put together my 2x gtx295 system, i only had an 800 watt modular PSU, so it couldn't handle the draw along with an i7 920 and other stuff. | ||
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FragKrag
United States11554 Posts
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LxRogue
United States1415 Posts
On January 24 2010 15:20 KOFgokuon wrote: Does anyone have an opinion on power supply calculators? For example, http://extreme.outervision.com/psucalculatorlite.jsp I entered my build (based on an i5-750 overclocked to 3.5 ghz with 1.4 voltage [more than in reality] and a 5850), and it says that I only need a 350 watt power supply, some previous advice in this thread or elsewhere said that an i5-750 and a 5850 could use almost 400 W or more on its own, I guess my question is how accurate are these calculators? Did you include a hard drive? DVD drive? Other peripherals? These things can add up. I forget my exact PSU wattage, but my specs are a bit lower than yours, and I have around 500W. I wouldn't get less than that. Also wattage isn't everything. Some brands have much better reps for being efficient than others; read the reviews. You also have to be careful that the PSU comes with enough connectors. | ||
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KOFgokuon
United States14902 Posts
The build is this http://www.teamliquid.net/blogs/viewblog.php?topic_id=108310 And the wattage (with a 5850) came out to 350, so this seems a little borderline. | ||
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ghermination
United States2851 Posts
650w Diablotek PHD series power supply, $43.60. Proof that quality=/=expense http://www.newegg.com/Product/Product.aspx?Item=N82E16817822004&cm_re=diablotek_phd-_-17-822-004-_-Product | ||
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FragKrag
United States11554 Posts
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ghermination
United States2851 Posts
On January 25 2010 03:52 FragKrag wrote: Does it not have a 12V rail? The information isn't available on newegg. I have the box of one right here, the (single) +12v rail is at 48a. 140mm fan, the power supply itself just feels very well put together, it's very solid and painted with some polish so it feels very smooth. Looking inside, i can see a mix of Ferrite chokers and Iron resistors. | ||
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FragKrag
United States11554 Posts
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semantics
10040 Posts
On January 25 2010 16:42 FragKrag wrote: Heh I wish I could SLi PSUs T_T you can use more then 1 psu nothing is stopping you besides finding where to put it they used to seel those gpu psus only that fit into your 5" rom drives bays lol when the 8800 and the 7950GX2's etc came out | ||
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Ecael
United States6703 Posts
On January 24 2010 15:10 FragKrag wrote: http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=17216647 I think this build will stay relatively stable until April :D! Decided to go with a 750W psu so there are more options with xfire Are you content with the price as it is or are you counting on the savings that's bound to come with combo deals and such, heh. Like how 23" monitors will just randomly drop to $150 or so on newegg. | ||
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FragKrag
United States11554 Posts
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Undisputed-
United States379 Posts
Cpu: i5-750 Mobo: ASUS P7P55D-E Pro ATX Intel Motherboard Memory: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Graphics: SAPPHIRE 100282SR Radeon HD 5850 1GB Hard Drive: SAMSUNG Spinpoint F3 500GB 3.5" SATA 3.0Gb/s PSU: CORSAIR CMPSU-750TX 750W | ||
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FragKrag
United States11554 Posts
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Undisputed-
United States379 Posts
On January 26 2010 04:44 FragKrag wrote: Why the Samsung HDD? It's one of the fastest HDD available and can't beat the price. | ||
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FragKrag
United States11554 Posts
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Undisputed-
United States379 Posts
On January 26 2010 04:55 FragKrag wrote: Oh it's a 1 platter 500gb yep | ||
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