Corsair HX620 - 620W is it enough for me?

[maxms]

Hi all,

i am going to buy this components:

* ASUS M3N-HT DELUXE - mother board with nVidia 780a chipset
* 8GB (KIT 4x2GB) DDR2 800MHz PC6400 CL5-4-4-18 OCZ Platinium Edition XTC
* AMD Phenom 9850 X4 Quad-Core
* two times (SLI) nVidida 980GTX
* two times (RAID) WESTERN DIGITAL Caviar RE2-GP 500GB
* SONY NEC Optiarc AD-5200S SATA - this is CD/DVD reader/writer


My question is that the PSU CORSAIR HX 620W is or isn't enough for these components.

Looking forward for any answears. Thank's.

[angelkiller]

Yes the Corsiar 620HX is enough.

About your component selection though, I have some suggestions.

Why Phenom? Intel's 45nm quads run cooler and outperform Phenoms. I'd recommend the Q9300. I'd also pair a 780i motherboard with that quad for SLI.

9800GTX is only an overclocked 8800GTS. They use the same chip. Save yourself the money and go 8800GTS SLI. This setup is only a tad slower than 9800GTX SLI but saves over 200 dollars. The performance difference can also be made up my overclocking.

[maxms]

Thank you angelkiller.

I find this:

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 http://www.corsairmemory.com/psufinder/default.aspx

this configurator advised corsair HX1000W

Why Phenom? Intel's 45nm quads run cooler and outperform Phenoms. I'd recommend the Q9300. I'd also pair a 780i motherboard with that quad for SLI.

-very good idea, there isn't any reason to buy Phenom, thank you. But Hybrid SLI is a priority for me and only chipsets for AMD support HybridSLI (780a, 750a, 730a, 720a). So probably I will buy dual-core AMD, and mayby in future upgrade. Phenom's aren't good CPU's.

9800GTX is only an overclocked 8800GTS. They use the same chip. Save yourself the money and go 8800GTS SLI. This setup is only a tad slower than 9800GTX SLI but saves over 200 dollars. The performance difference can also be made up my overclocking.

-I know that 9800GTX has the same core as 8800GTS/GT/GTX - the G92, but i want to have a HybridSLI function, so I will buy one 9800GTX and another one later when the prices fall down

For configuration Intel Q9300 + ASUS 780i + 2x nVidia 9800GTX + 2xHDD
configurator advised corsair TX750W - but I read that this PSU isn't so quiet as HX620 or HX1000

What do you thing guys about this?

[angelkiller]

Most power supply calculators overestimate. Here's my calculations:

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CPU=95W, GPU 1=160W, GPU 2=160W, Motherboard=30W, RAM=30W, HDD=20W, Optical=20W

Total is 515W. But note that this is overestimated. So your actual power draw will be less. The 650HX give ample headroom for this system.

but i want to have a HybridSLI function

As far as I know, Hybrid SLI is only supported on AMD motherboards, which (could) explain why you started with a Phenom setup. So pick out a phenom and a 780a motherboard and you'll be set.

[Erssa]

Don't get HX620. Your rig is going to be close to 400-600W range loaded. HX620 is going to be screaming at 40 dBA at that load. You have 2 decent choices for such a rig. Zalman ZM1000-HP and Zalman ZM850-HP (my recommendation).

[Erssa]

Motherboard=30W

I believe that is a gross underestimation. 780a is one of the most power hungry chipsets. Ever.

[SebRad]

Hi, Anandtech report 500w under load for a system with 9800GTX SLI and QX9775 (3.2GHz quad core "penryn"). That is probably an AC power figure and 80% PSU efficiency would give 400w DC.
SPCRs review of the HX620 put it at 29dB(A) at 407w DC output (487w input), admittedly the SPL went up a lot by 500w output but you may exhaust more of the heat through case fans etc in a real system than SPCR test rig.
The Enermax Modu82+ 625w (presumably the Pro82+ also) is rated at a quieter 26dB(A) at 400 and 36dB(A) at 500w vs the HX620 at 43dB(A).
[TX650 is 38/43dB(A) and ZM1000 20/26dB(A) – definitely see table of power vs noise low down on this page.]
I had a quick look at a UK retailer and the HX620 is £85, the Pro82+ 625w was £88 and the Modu82+ £98. The HX1000 was a pricy £159 while the 1000w Zalman was £139. The Zalman 850w was £107 and, interestingly, there appears to be a 750w version (same description of dual heatpipes, 80% efficiency etc) for £100
Summary: the Corsair HX620 will power your system but it may not be quiet under load. A case like the P180 would help as the system heat doesn't go through the PSU.
Some Zalman and Enermax offerings maybe quieter under load but more expensive. (and you have to keep the rest of the system quiet under load too to benefit)
Seb

[Erssa]

Hi, Anandtech report 500w under load for a system with 9800GTX SLI and QX9775 (3.2GHz quad core "penryn"). That is probably an AC power figure and 80% PSU efficiency would give 400w DC.
SPCRs review of the HX620 put it at 29dB(A) at 407w DC output (487w input), admittedly the SPL went up a lot by 500w output but you may exhaust more of the heat through case fans etc in a real system than SPCR test rig. The Enermax Modu82+ 625w (presumably the Pro82+ also) is rated at a quieter 26dB(A) at 400 and 36dB(A) at 500w vs the HX620 at 43dB(A).

Zalman is still alot quieter then either Enermax or Corsair. Plus, Phenom would draw ~50W more then Intel. If he decides to get Phenom...

I had a quick look at a UK retailer and the HX620 is £85, the Pro82+ 625w was £88 and the Modu82+ £98. The HX1000 was a pricy £159 while the 1000w Zalman was £139. The Zalman 850w was £107 and, interestingly, there appears to be a 750w version (same description of dual heatpipes, 80% efficiency etc) for £100

Supposedly the 750W doesn't have the same fan controller as the 850W or 1000W models. It's better to play it safe and get the 850W model.

Some Zalman and Enermax offerings maybe quieter under load but more expensive. (and you have to keep the rest of the system quiet under load too to benefit)
Seb

I don't think £20 price difference between HX620 and Zalman 850W is an issue, if you are going with 9800 GTX SLI...

[maxms]

Thank you Erssa and SebRad

I decided not tu buy a Phenom, but "only" AMD Dual-Core Athlon A64 X2 5000+ EE Black Edition - this will be enough - most of software is optimized only for 2 core CPUs.
And my question was hypothetic, now I am only going to buy one 9800GTX - and that configuration I posted was planed to the future when another one 9800GTX won't cost so much. But also interesting choice in future will be NVIDIA GeForce GTX 280 45nm - but this GPU is only planed .

So question of money is important for me. Here in SLOVAKIA is difference in price between CORSAIR HX620 (cost £88 ) and ZALMAN ZM850-HP (cost £157) £69. That's a lot I thing.

Probably I will buy that CORSAIR HX620. It will be enough and also it will run more quiet for that "new" configuration (AMD AthlonX2 5000+, 9800GTX, 8GB RAM, 2x HDD, 1x CD/DVD).
(cpu 65w + gpu 160w + hdd1 7w + hdd2 7w + cd/dvd 20w + motherboard 60 or 100w ??? total 319 - 359W - CORSAIR HX 620w will make 22 - 29dBa and when I decide to buy another one 9800GTX than it will be 40 dBA . But don't forget HybridSLI

Thank you guys.

[smilingcrow]

nVIDIA have new mid range cards coming out very soon apparently that will also support Hybrid Power – the 9800 GT is one being a rebadged and possibly lightly tweaked 8800 GT 512MB.

But don't forget HybridSLI

Hybrid SLI is aimed at mixing entry level cards with an IGP and don’t think it will work well if at all with the sort of cards you are interested in. Hybrid Power will be a useful feature though and nVIDIA have a chipset for Intel CPUs that supports Hybrid SLI and Hybrid Power but not proper SLI.