Power supply

[cookiebun]

Hi I am upgrading my daughters system and have been looking at this Power Supply has anybody any info on it and will it run her new system, she might be getting an AMD Phenom II X4 965 Black Edition, Deneb Core, S AM3, 3.4GHz   

http://www.scan.co.uk/products/750w-coolermaster-rs750-acaae3-uk-gx-80-plus-85-eff-sli-crossfire-eps-12v-120mm-fan

 NZXT Lexa S
Gigabyte GA-MA790X-UD4P (rev 1.0) mobo
AMD Athlon 64 x2 6000+, 3000mhz
4gb ddr2 6400 800mhz ram
XFX HD 4870 X2, PCI-E 2.0, 3600MHz GDDR5, GPU
Seagate Baracuda 500gb,16mb cache
Stock cooler
DVD Writer
19” LCD Monitor
Creative Stereo Speakers
Windows Vista Home Premium    
 

[Christoph]

that one is just perfect

[absic]

Hi Cookiebun

you might want to check out this review at JohnnyGuru: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=188 (thanks to Soar for original link)

If it was my money and based on the specs for your daughter's PC I would probably go for this PSU: http://www.scan.co.uk/products/650w-corsair-cmpsu-650txuk-tx-86-eff-sli-crossfire-37db-eps-12v-120mm-quiet-fan-single-rail even though it is only 650 Watts.

[bytheway_r]

If you're willing to wait till Tuesday I'll be checking a 4870x2 with the PSU absic linked. Now, I can't guarantee I'll be able to give any worthwhile info as the card I bought may be damaged ( it was sold as unchecked ).

650W is a little on the low side for this card but it'll work. It'd be best to not overclock to the extreme with it, though. By that I mean 1.5v+ on the CPU and high clocks on RAM and GPU, too.

[absic]

I'm actually using a 625Watt Corsair modular PSU with a Sapphire 4850X2 and I have O/C'd my 1090T CPU to 4GHz + without a problem.

My full system specs are:
Chassis: NZXT Tempest Evo
PSU: Corsair 625 Watt Modular
Mobo: GA-890FXA-UD5 (F6 BIOS)
CPU: AMD Phenom II x6 1090T BE 125W
Cooler: Noctua NH-D14 Air cooler
RAM: Corsair Dominator 2 x CMD4GX3M2B1600C8 (8 Gig) running at 1333MHz
GPU: Sapphire Radeon ATI 4850x2 (1 Gig)
Monitors: 1 x LG L1715S & 2 x LG L194WT
Sound Card: M-Audio Delta 1010
HDD's: 1 x Hitachi Deskstar 1TB, 2 X WD 640 Gig Caviar Black SATA3, 1 x Seagate 1TB
DVD/CD: Liteon
Mouse: Microsoft Intellimouse Optical USB
Keyboard: Microsoft Digital Media Pro
OS: Windows 7 Ultimate 64 bit (Retail)

Main Use of system: Audio Recording & Mixing and Graphics Design & Editing

[bytheway_r]

Yeah, but from what I remember you didn't have to go all that far with voltages . Isn't your PSU the HX620? Couldn't find one rated at 625W. Lastly, the 4850x2 is a little less power hungry . Though, I suppose with all these HDDs you may reach similar total consumption.

Put it another way, this PSU will be enough no matter what with this card but with heavy overclocks on everything it may end up drawing close to 500W under benchmark load. With gaming, ~400W.

On the other hand, this got me thinking. How exactly reviewers measure power consumption? Is it draw on the socket or PSU output? If it's on the socket then PSU strain would be noticeably lower, actually.

Now I'm confused - absic this is all your fault!

edit:

Ok, I think they measure at the socket, so a 650W PSU is almost twice the power required here. In other words, all you have to worry about is your electricity bill. Even with heavy overclocks the PSU should have at least 200W left over.

[cookiebun]

Hi thanks for all the help, I am using a Corsair 750 PSU in my new system and i used it to run the system my daughter is getting so I know Corsair 750 is able to run it and would be my first  choice but the 750 is a bit out of thier reach price wise but if the 650 is able to run her system with no problems I think I will am edging towards the Corsair.

[absic]

The 650 Watt Corsair should handle your daughter's system without a problem. That's why I went for that one.

Isn't your PSU the HX620?

Yep, my bad should double check the specs it is the HX620: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=21

You might also like to check out this thread: http://forum.giga-byte.co.uk/index.php/topic,4028.0.html and follow the link that Jolphil posted there. It makes interesting reading.

[cookiebun]

Hi your confused, yes they will be using it for games and I also think that they might plug it into thier 37"sony bravia HD tv would that put more of a strain on the 650 I know the 750 will cope as I have done it with ours and yes the graphics are sweet but I was told by the wife tvs are for tv programs.
 

[bytheway_r]

I don't really see how a screen can put any strain on a PC's PSU. I mean, all screens that I've seen had their own power cable. In other words, a PC monitor or TV isn't powered by your PSU.

That's a good thing, too cosidering how much power a 37" TV can consume.

[cookiebun]

no the graphics card should have to work harder because of the higher resolution

[Wonderwrench]

Not that the eXtreme Power Supply Calculator is the final word but entering the system spec's you supplied I get a recommended PSU size of 616 watts
556 watts minimum. I had to do some guessing as detailed info on the build is lacking in some areas so I figured, CPU at stock speed, 4 DDR2 modules, 2 120mm fans, 1 led 120mm fan and 1 140 mm fan, as the NZXT Lexa S comes stock. 90% CPU TDP, 90% system load, 30% capacitor aging. So I agree with absic. A quality 620-650 watt PSU such as the HX620 would be perfect. I then figured adding two more hard drives and a Blu-ray burner and a HX620 will still handle it. http://www.extreme.outervision.com/psucalculator.jsp

Bill

[bytheway_r]

no the graphics card should have to work harder because of the higher resolution

I'm not too sure about this but even if it's like that you're still fine.

The way I understand it, GPU load at lower resolutions may drop because of the CPU not being able to keep up with the GPU. Thus throttling the GPU down ( keep in mind that this depends on the number of frames generated rather than resolution ). At 37" the GPU should run 100% load as the situation will be reversed ( GPU limiting performance ). All in all, the TX650W will still handle that with ease.

[cookiebun]

so really what you are all saying is go for the Corsair 650w ?

[absic]

Well, I can't say what the others are recommending but that is the one I would go for.