EPTThe 5770 is now 6770 I think. Same card different name.
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Sablar
Sweden880 Posts
The 5770 is now 6770 I think. Same card different name. | ||
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Ovi
164 Posts
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skyR
Canada13817 Posts
On January 05 2012 13:06 Ovi wrote:+ Show Spoiler + An i5 2500K overlocked at 4.8 GHz, an overclocked HD 6950, a 120 gb Intel SSD and 6 120/140 mm fans. What minimum amount of W psu do you recommend me getting? Minimum is a quality ~400w. Recommended is a quality ~500w unit such as the Rosewill Capstone 450. | ||
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Ovi
164 Posts
On January 05 2012 13:09 skyR wrote: Minimum is a quality ~400w. Recommended is a quality ~500w unit such as the Rosewill Capstone 450. Thanks. I forgot to mention the 212 EVO cooler btw, shouldnt change anything though i assume. I should say though, the 500 W psu for my build seems to go against a lot of peoples believes, or atleast against their actions. Some very knowlegeble people from Overclockers.se told me basicly the same though, that 500 W is enough for most high end (non SLI/crossfire) gaming computers today. | ||
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jacosajh
2919 Posts
On January 05 2012 13:10 Ovi wrote: Thanks. I forgot to mention the 212 EVO cooler btw, shouldnt change anything though i assume. I should say though, the 500 W psu for my build seems to go against a lot of peoples believes, or atleast against their actions. Some very knowlegeble people from Overclockers.se told me basicly the same though, that 500 W is enough for most high end (non SLI/crossfire) gaming computers today. No, the 212 EVO shouldn't change anything. Except it's allowing you to overclock higher. But skyR already took that into consideration. | ||
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skyR
Canada13817 Posts
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Womwomwom
5930 Posts
If you're not a mongoloid who pumps so much voltage into your hardware that the transistors literally break apart, you won't suffer from power problems. | ||
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Sablar
Sweden880 Posts
A 400W quality PSU I'm not even sure it could take it. 4.75GHz is like +70W (at wallsocket so in effect even more for the PSU, see below) and adding GPU OC must be another +30W(idk probably more?). I wouldn't want to run a stock 2500 + 6950 on a below 300W quality PSU. http://www.sweclockers.com/recension/13224-intel-sandy-bridge-core-i7-2600k-core-i5-2500k/20#pagehead (GPU not under load). | ||
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jacosajh
2919 Posts
On January 05 2012 14:59 Sablar wrote: I would recommend a bit more though. 4.8GHz is a pretty heavy OC and also GPU OC is added to that. It will probably work with the Rosewill but some leeway can be nice I think. Compared to a normal 2500 + 6950 this will draw a LOT more power and even with a great +12V rail there will be load on the other lines as well that limits it to less than what it can do on the Rosewill. A 400W quality PSU I'm not even sure it could take it. 4.75GHz is like +70W (at wallsocket so in effect even more for the PSU, see below) and adding GPU OC must be another +30W(idk probably more?). I wouldn't want to run a stock 2500 + 6950 on a below 300W quality PSU. http://www.sweclockers.com/recension/13224-intel-sandy-bridge-core-i7-2600k-core-i5-2500k/20#pagehead (GPU not under load). Stock HD 6950 + i7 965 consumption @ load: http://www.bit-tech.net/hardware/2010/12/16/ati-radeon-hd-6950-review/10 (Also: http://www.anandtech.com/bench/Product/293) Since i5 2500k uses less than the i7 965: http://www.bit-tech.net/hardware/2010/12/16/ati-radeon-hd-6950-review/10 I don't know how a 400W quality PSU wouldn't be sufficient. | ||
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Womwomwom
5930 Posts
So just get the 450W Capstone and be happy with your purchase. Its not very expensive, is very good, and comes with two PCIe plugs. | ||
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Myrmidon
United States9452 Posts
Anyway, we're talking about 400W continuous-rated power supplies of reasonable quality. They're not going to blow up the second you load them to 400W, and you'll struggle to ever pull that much anyway. The suggestion was around 500W, and that's plenty reasonable. | ||
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jacosajh
2919 Posts
Btw where do you guys get specific information on psu units like oem and component quality? | ||
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Womwomwom
5930 Posts
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Myrmidon
United States9452 Posts
On January 05 2012 16:25 jacosajh wrote: Ah right I wasn't even thinking about the 12v the pcie plugs on most lower wattage psus etc Btw where do you guys get specific information on psu units like oem and component quality? Reviews. Though as Womwomwom said, you can check the sticker and look up the UL number, which sometimes will identify the OEM. Sometimes companies pay for their own UL number even if the unit is actually manufactured by somebody else, so it doesn't always work. edit: sometimes based on the physical appearance (location of power plug, presence of voltage selector switch, general layout of components as seen through the back grille or fan opening) or electrical information on the labels, you can see that something looks like another known unit. i.e. if you see something with what looks like the same layout as Seasonic S12II Bronze 520W and it also has the same wattage listed on all the rails...it's probably Seasonic S12II. RealHardTechX keeps track of OEMs, reviews, +12V ratings, warranty length, and cable modularity for most power supplies and is generally accurate. http://www.realhardtechx.com/index_archivos/Page541.htm TechPowerUp, Hardwaresecrets, and JonnyGuru are typically the most thorough about teardown and components used. | ||
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Sablar
Sweden880 Posts
On January 05 2012 15:19 jacosajh wrote: Stock HD 6950 + i7 965 consumption @ load: http://www.bit-tech.net/hardware/2010/12/16/ati-radeon-hd-6950-review/10 (Also: http://www.anandtech.com/bench/Product/293) Since i5 2500k uses less than the i7 965: http://www.bit-tech.net/hardware/2010/12/16/ati-radeon-hd-6950-review/10 I don't know how a 400W quality PSU wouldn't be sufficient. You're missing the point, which is that an OC system requires significantly more power than a stock system, and that recommendations should follow the same thought process as they do with stock. So basically for an OC like this +150W or so should be considered. The 2500k OCd would use around the same as a i7 965 looking at the swec article, and running 3dmark at 1024 definitely isn't enough to max that system out and peak W in the bit-tech article. http://www.overclockersclub.com/reviews/asus_hd_6950_review/16.htm Above is only thing I could find about power consumption for OC but +60W for their OCd 6950 is interesting even though it doesn't say how it was measured. The overall high numbers seem to be greatly influenced by the OCd CPU they use. SB pretty efficient overclocker compared to that at least. Anyway, the bit-tech article was interesting, but personally I would prefer to be on the safe side and have some leeway from possible peaks that are higher than that, and also allows for some deterioration of the PSU. Also noteworthy that a 450W power supply is never going to be able to draw as much as 450W at the socket. As I said it would probably work especially with the Rosewill that is more "quality" than comparable units, but I would want to allow for some leeway and 400W minimum is really cutting it I think. I would prefer something like 500W with really good quality or ~550W with good quality when OCing. I personally have the same system with 6950 (->6970) and 2500k but I kept my old corsair HX 620 that has been with me for a long time now. It was honestly too much when I bought it but I did end up with an SLI config and it has lasted well over the years. | ||
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skyR
Canada13817 Posts
If you're asking for help on selecting a power supply than you obviously don't have the money to just throw away and probably not the knowledge or intention of doing absurd overclocks. If you're doing something other than gaming that puts both components at full load for hours on end than I certainly hope you would specify that if you are asking or just waste money on a high-end unit. An reasonably overclocked 2500k uses around 80w maybe in normal tasks such as gaming and maybe a little over 120w when it comes to absurd overclocks and stressing it at 100%. A stock Radeon HD6950 uses around 170w, a reasonable overclock is probably going to add less than 50w. And uh ya... a 450w power supply should draw more than 450w at the socket. | ||
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Shikyo
Finland33997 Posts
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Sablar
Sweden880 Posts
As I said I see reasons for keeping a margin, and also keeping the same margin for recommendations to this kind of OC compared to builds where the user will run at stock. This isn't really done here. I don't know how I ended up with getting that PSU efficiency backwards. Of course you are right about it so one less reason but still the other points stand about consistent margins, leeway, deterioration and simply the fact that the OC is quite demanding. | ||
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Medrea
10003 Posts
My Antec PSU is rated 550W. And runs a 5830 and a 5770 overclocked to the max and mining. And in i5-2500k that is also overclocked. While being 7 years old. And a 5830 + 5770 maxed out and mining pulls a lot more than a 6950 for video gaming. Way more. And my 550W Neo Power probably has about the same amperage available on the 12V as that 400W model. Also because the supply was made high quality, it also keeps its efficiency at high levels as well. | ||
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skyR
Canada13817 Posts
So I don't see why you think a quality ~500w unit such as the Rosewill Capstone 450 is not a reasonable recommendation for such a configuration. If there were quality ~300w units that were reasonably priced than that would be what's recommended for the majority of non-overclocked single GPU configurations since the majority never exceed 200w. Even for someone who can't do simple conversion, all the configurations except a GTX 590 and 6990 draw less than 500w under gaming and this is with an overclocked Sandybridge-E: ![[image loading]](http://images.anandtech.com/graphs/graph5261/43137.png) | ||
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