SPCRhttp://www.silentpcreview.com/forums/ Alternatives to Corsair 200Rhttp://www.silentpcreview.com/forums/viewtopic.php?f=15&t=67678 Page 2 of 2

 Author: CA_Steve [ Fri Jun 27, 2014 11:28 am ] Post subject: Re: Alternatives to Corsair 200R CPU power is proportional to f*(V^2), where f is clock frequency and V is CPU core voltage. So, if you overclock with stock voltage, then a 20% overclock -> 20% more power. So, instead of ~84W max load, it's ~100W. If you overvolt, then it gets more exciting. Figure ~1.1V core voltage for stock. If you raise this to 1.2V, then your power use goes up (1.2^2)/(1.1^2), or 19%. So, if it takes a core voltage of 1.2V to get a 25% freq. bump, your max load power goes up 1.19*1.25 = 48.75% to 125W...and so on.

 Author: doveman [ Mon Jun 30, 2014 5:46 pm ] Post subject: Re: Alternatives to Corsair 200R CA_Steve wrote:CPU power is proportional to f*(V^2), where f is clock frequency and V is CPU core voltage. So, if you overclock with stock voltage, then a 20% overclock -> 20% more power. So, instead of ~84W max load, it's ~100W. If you overvolt, then it gets more exciting. Figure ~1.1V core voltage for stock. If you raise this to 1.2V, then your power use goes up (1.2^2)/(1.1^2), or 19%. So, if it takes a core voltage of 1.2V to get a 25% freq. bump, your max load power goes up 1.19*1.25 = 48.75% to 125W...and so on.Thanks, that makes sense. I'm not going for maximum overclock, something modest like 4.2Ghz (which might be all the 4670k can manage and still keep reasonable temps, without delidding it, which I don't want to risk), so I think allowing 150W for the CPU should be OK.In fact, this shows it only pulling 162W at 4.6Ghz even with the artificial load of Prime95. Nutty to see how much more power the older CPUs draw when OC'd (and in the case of the FX-8350, even when not) though http://www.bit-tech.net/hardware/2013/0 ... u-review/6

 Author: doveman [ Mon Jun 30, 2014 5:50 pm ] Post subject: Re: Alternatives to Corsair 200R quest_for_silence wrote:Did you check at how much LambaTek sells that EVGA G2? IIRC it's priced at more than £108 (excluding shipping, vs £81 shipping included @ Amazon).I just checked and it's £85.91 inc. VAT but plus shipping, which brings it to £91.85. I don't see what that has to do with whether it would be good value to buy the L8 from them though (assuming the L8 was worth buying at all of course).

 Author: quest_for_silence [ Tue Jul 01, 2014 3:26 pm ] Post subject: Re: Alternatives to Corsair 200R doveman wrote:It just annoys me a bit to have to buy a 750W+ when I might only be pulling 350-400W That's because you want to spare money (and you're lucky EVGA pricing is so aggressive): a premium 500-600W unit would be fine for a 400W power draw, but it would also cost you more money. Another reason is the room you want to grow: apparently you don't need more than 200-250W, so a cheaper Corsair RM450 (or maybe a BeQuiet E9) will be fine and quiet. Last but not least, either the EVGA or the Corsair are semi-fanless and more efficient units, while your current Antec (and Nexus) are mostly noisier: so with those high powered PSU you're upgrading, noise-wise and efficiency-wise, while not spending that much. doveman wrote:As you said about the reviews though 'obviously, they can't help you about the relevant noise signature, which is very important' and as we have no information about it, how can we possibly choose a PSU? As you know, at a given speed, to say, at 800rpm, two different fans can sound quite differently while emitting a not so different SPL: to say, one benign, unobtrusive, one annoying. Tone, bearing noise, chattering, clicking, and so on, are all "sound qualities" that SPL doesn't take into account. So TPU with those rpm figures can give an help in the current scenario, where no reviewer but SPCR owns a well made semi-anechoic chamber (and a well educated, focused attitude on sound quality), but that's not enough. doveman wrote:No, I wasn't aware of the different ages, warranty terms, etc. You weren't even aware of relevant performances and build quality, which equally affect end pricing. doveman wrote:I just checked and it's £85.91 inc. VAT Four days ago it was 108. doveman wrote:I don't see what that has to do with whether it would be good value Perhaps are you somehow short-sighted?

 Author: Rockfella [ Tue Jul 01, 2014 4:51 pm ] Post subject: Re: Alternatives to Corsair 200R 750W PSU for a non gaming PC sounds weird. Lower wattage PSUs work better for non gaming PCs as the PSU has to be substantially loaded to get optimum efficiency. I think you should use it for yourself and get a low wattage one for your dad along with a fractal design entry level cabinet.

 Author: doveman [ Tue Jul 01, 2014 5:41 pm ] Post subject: Re: Alternatives to Corsair 200R The Thermalright Macho 120 http://www.scan.co.uk/products/thermalr ... d-am2-am2p might be a slight more expensive alternative to the Hyper 212 EVO http://www.scan.co.uk/products/cooler-m ... 156-1366-aI do want whatever I get to have the fan facing the rear of the case though.

 Author: doveman [ Wed Jul 02, 2014 2:42 am ] Post subject: Re: Alternatives to Corsair 200R Rockfella wrote:750W PSU for a non gaming PC sounds weird. Lower wattage PSUs work better for non gaming PCs as the PSU has to be substantially loaded to get optimum efficiency. I think you should use it for yourself and get a low wattage one for your dad along with a fractal design entry level cabinet.My Dad's PC is a gaming one, albeit only X-Plane and he might only be pulling 350W unless he adds a second GPU but at least he has the option. I mainly got the CX750M as it was on offer at a decent price for a 750W, modular supply. It won't be quiet enough for me, so I've bought myself the eVGA G2. My Dad's case (NZXT Source 530) is bought and isn't going to change either.

 Author: Rockfella [ Wed Jul 02, 2014 8:41 pm ] Post subject: Re: Alternatives to Corsair 200R doveman wrote:Rockfella wrote:750W PSU for a non gaming PC sounds weird. Lower wattage PSUs work better for non gaming PCs as the PSU has to be substantially loaded to get optimum efficiency. I think you should use it for yourself and get a low wattage one for your dad along with a fractal design entry level cabinet.My Dad's PC is a gaming one, albeit only X-Plane and he might only be pulling 350W unless he adds a second GPU but at least he has the option. I mainly got the CX750M as it was on offer at a decent price for a 750W, modular supply. It won't be quiet enough for me, so I've bought myself the eVGA G2. My Dad's case (NZXT Source 530) is bought and isn't going to change either.Woah! Nice

 Author: doveman [ Tue Jul 08, 2014 9:39 pm ] Post subject: Re: Alternatives to Corsair 200R Can't say I'm very impressed with the eVGA G2 so far I'm afraid. Whilst it's essentially silent in Quiet mode, it randomly ramps up for no apparent reason (browsing, CPU at 5%) and it's very intrusive like that and stays there for a few minutes before going off again. It's does the same when running a game (X-Plane) which is only using 25% of the CPU (one core of my Phenom II X4 955) and 60% of my HD6950, so I wouldn't have thought it was drawing enough to get hot enough to need to run the fan so loud but I could accept it when gaming but not when essentially idle.Switching to Normal mode, it's quieter than when it ramps up in Quiet mode but still quite intrusive and of course, it may still ramp up faster, although maybe having the fan running constantly will keep it cool enough to avoid needing to spin up the fan faster/noisier.Certainly a big disappointment after my Antec CP850

 Author: quest_for_silence [ Tue Jul 08, 2014 11:21 pm ] Post subject: Re: Alternatives to Corsair 200R doveman wrote:Can't say I'm very impressed with the eVGA G2 I'm very sad to know that, doveman: return it to Amazon, as soon as possible (since that's their major selling point). To be fair, I am very puzzled because both no review makes mention of this odd behavior, and on monday I've received the original SuperFlower Leadex platform, even if it's a Platinum 650W (and not a Gold 750 like your eVGA), and it's really silent, I've not experienced so far any similar issue. As I said, return it to Amazon (and give a call to eVGA Customer Support to complain about), and also please accept my apologies for my advice.

 Author: doveman [ Wed Jul 09, 2014 2:15 am ] Post subject: Re: Alternatives to Corsair 200R quest_for_silence wrote:As I said, return it to Amazon (and give a call to eVGA Customer Support to complain about), and also please accept my apologies for my advice.Thanks Luca but I don't blame you at all. You can only go by the available information and either I've got a faulty unit or the reviews were wrong and without your advice I would have probably bought something much worse, electrically if not acoustically I will return it as you suggest. I can put the CX750M back in to keep me running whilst I wait for a replacement but if I'm going to get a refund and buy something else, rather than just swap out the G2 for another, hopefully better, one, it would be better to buy the replacement to put it before returning the G2, as I really should get on with my Dad's build, which the CX750M is for.

 Author: doveman [ Sat Jul 12, 2014 4:32 pm ] Post subject: Re: Alternatives to Corsair 200R So I dug through my boxes and found I have:1*Nexus 120mm D12SL-121*Scythe 120mm SY1225SL12M2*Scythe 120mm SY1225SL12LM-P (PWM)1*Yate Loon 140mm D14SL-121*NB BlackSilentPro 140mmSo I'm wondering how best to divide these between my HAF XB EVO and my Dad's NZXT Source 530 (both running overclocked i5 4670k systems).The NZXT case accepts 2*140mm/120mm at the front, 1*140mm/120mm at the rear, 2*120mm at the bottom and 1*140mm/120mm on the internal bracket behind the upper HDD cage. It also takes 2*140mm or 3*120mm at the top but I'm not going to use that and will block it off, as my Dad will have his document tray on top of the case.The HAF XB EVO takes 2*140mm/120mm at the front and one 120mm at the rear.I've also got to use something on both CPU heatsinks. Currently my Dad's NZXT build has the stock fan on the Hyper 212 Evo HSF, which appears to be detachable from the clip and it comes with an extra clip for mounting a secondary fan at the back, so I could mount 2*120mm to that if it's worth it. I imagine a Scythe PWM might be the best to use on there.I'm not sure what heatsink I'll be getting for my own build yet but it'll probably be best to use the second Scythe PWM on that.Then I can put a 140mm at the front of each case. I'm not sure which is the quieter of the two but I'm far more sensitive to noise than my Dad is, so I need to use the quieter fans for my own build. I'd guess that the NB BlackSilentPro is quieter than the Yate Loon.That will leave the Nexus 120mm and the Scythe 120mm, so I could use those for the rear exhausts, with the Scythe probably having the edge over the Nexus.I guess the front intake is more for providing airflow over the HDD/chipset as the CPU fan will draw in the air it needs without needing it blown towards it. With the HAF case, the front fan will be right next to the motherboard, so will blow directly onto it, whereas with the NZXT case it'll be in front of the HDD cage, unless I mount it in the upper position and remove the HDD cage behind that (which I can do, as my Dad only has two HDDs and that will leave three slots), or else I could mount the fan on the internal mount, behind the HDD cage, although perhaps then it will blow mostly around the RAM/CPU area, whereas on the front it will distribute the air over the lower half of the board a bit as well. I'm not sure it's really necessary to have a fan blowing over the HDDs but I guess it might help to keep the temps down a bit. I can always get another fan (140mm or 120mm) to add to my Dad's case (at the front or internal) if that will be useful.I won't be doing my own build for a while yet, so I just need to decide what to do with my Dad's build for now, as it's only a couple of weeks until his birthday. So if you've got any suggestions on what would be the best approach, please do share them.