Topic: "EVGA SuperNOVA G3 , 80+ GOLD, 1000W" or "EVGA SuperNOVA 80+ PLATINUM 850W" (Read 368 times)

Thanks for the detailed explanation, really appreciate it! I won't cancel the order for these two G3 units, but I won't be ordering any more of them. There were P2 1200W units available as well, but they're ~ $150 more so I figured G3 were a better deal (which are still almost $300 per unit here.. the GPU and PSU prices are crazy high at the moment).

 "Hydro Dynamic Bearing" is a fancy name for a sleeve-type bearing that has one or more extra grooves in the bearing or the shaft to help lubricate it better.
 The original version of this was called a "rifle bearing" but the folks that created that version patented it, so alternatives have had to come up with different names and slightly different details in the implamentation to work around the patent.
 The ISSUE is that all such bearings require lubrication to work at all, and that when the SEALS wear enough to let the lubricant wear out, the fan very quickly fails.
 The "improved bearing" doesn't MATTER at that point.

 Ball bearing fans will keep running for YEARS in most cases even with no lubricant at all, some are designed to not use lubricant in the first place.
 They also tend to be designed to handle higher temperatures - many of those "hydro dynamic" bearing fan designs are lifetime rated at 40 C, which is on the COOL side for a lot of mining setups - ball bearing fan lifetimes are commonly tested at 50C which is quite warm.
 When those fluid hydrodynamic fans get tested at the higher temp, the lifespan gets a LOT shorter, as the extra heat is bad for the seals (which are usually a synthetic rubber of some sort).

 I have never had ANY sort of "sleeve bearing fan" design survive 2 years in 24/7 usage in a computer or power supply.
 More commonly they fail in less than ONE year - but to be fair, most of THOSE failures were on straight-up sleeve bearing fans not the "fancy name supposed to be better" ones.
 These "higher quality" fans might IN THEORY last longer, but I'd bet they don't make it anywhere near to the warrenttee timeframe in 24/7 high load on the power supply usage.

Besides the G2 using a larger 140mm double ball bearing fan compared to the 130mm Hydraulic Dynamic Bearing fan on the G3, I would think the smaller casing on the G3 would heat up faster, therefore requiring the smaller fan to run at a higher fan speed. I think the Hydraulic Dynamic Bearing fan on the G3 is designed to be quieter. The double ball bearing fans should be more durable.

On newer builds, I've been going with the G3's even though they are Gold rated -- I like them better overall.

Well, the warranty is still a hassle in many countries, where I live I'll have to return it to the store and then wait up to 2 months before they return my money (or the repaired PSU, though it's usually money). It's not always possible to get the same model fast when something fails, and in "gold rush" periods like this one it's nearly impossible to buy any high-wattage PSUs at all.. So I'd rather know what kind of components are used in hardware I choose for my rigs than simply rely on the warranty. And if the fans in these G3 units are no good I'd rather not buy any more of these. So if anyone has any experience with the fans in these EVGA G3 PSUs failing I'd like to hear about those.

Case closed.

Sorry for bumping the old thread. I've just ordered a couple of EVGA G3 1000W units and was researching them (had to order first cause they go out of stock very fast, and actually were sold out within an hour after I ordered), this thread is on one of the first pages on google when searching for "evga g3 1000w mining", so I thought it might be better to just post here instead of opening another thread. Could you please elaborate on "junk sleeve-bearing type fan that is NOT good for longevity" — are they really that bad? The reviews I've read said they're not typical sleeve-bearing fans, tom's hardware lists the fan as "EVGA H1282412H (12V, 0.35A, 2170 RPM, Hydro Dynamic Bearing". And then there's 10 year warranty.. Did you have bad experience with them? How long did they last?

The 1000 provides more power - but has a junk sleeve-bearing type fan that is NOT good for longevity at high temperature and load levels like a mining-used power supply will normally see.
 IMO if you can find one go for the EVGA G2 1000 or the P2 equivilent, or the 850 versions, depending on how much power your rig actually needs.

I highly recommend checking out every PSU you intend to buy on jonnyguru.com.

EVGA Supernova G3 1000W - http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=494
EVGA Supernova P2 850W - http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=444

TLDR; assuming a safe 0-24h limit of 80% capacity, the 1000W PSU has an efficiency of ~90.3% while the 850W platinum at 80% (680W) has ~90.8%.

So yeah, just go with Gold, it's plenty enough.

Hi,

Which of these PSUs provides more power?
1- EVGA SuperNOVA 80+ PLATINUM 850W
2- EVGA SuperNOVA G3 , 80+ GOLD, 1000W

GOLD or PLATINUM?