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Zalman ZM1000-HP Plus 1000 W

crmaris

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#1
It's a common truth that high wattage PSUs and low noise levels do not get along very well, so many users are forced to buy lower wattage PSUs that cannot support a powerful system with two or three hi-end VGAs. To address this, Zalman's ZM1000-HP Plus 1000 W uses heatpipes to lower the fan's RPMs and minimize noise.

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#2
I also expected all PCIe connectors to have eight pins. On a model like the ZM850-HP a mix of 6 and 8 pin connectors could be acceptable due to the lower wattage, but not for a 1000 W model like this.
Why? The only cards I know that have only eight pin connectors are the HD 6990 and GTX 590. This would lead to a problem with this PSU power 2 of those titans at once, but the spectrum of people with 2 of these is a very, very, very, small market.

While I can't say this unit is not directly targeted at that market, I can see people run just one of those cards, or 2 or 3 lesser cards buy a 1000 watt unit. I will even venture to say the latter is far more likely being a much broader market.
 

crmaris

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#3
6990 peaks (max is lower) at 301W and 590 at 356W according to TPU reviews, so with two VGA configuration power consumtion (on the VGAs) would be 602W and 712W. I think there is plenty of room till 1000W that this PSU outputs.

In the past I have tested 6pin and 6+2pin PCIe connectors and got the same results on all of them, meaning that 6pin could draw as much power as 6+2 without any extra voltage drops. You see the two extra pins are just grounds. However some cards in order to unlock overclocking features (at least in an ancient 3870X2 I had this was the case) 6+2pin connectors were essential.
 
Joined
May 7, 2009
Messages
5,265 (1.65/day)
Likes
1,452
Location
Marietta, GA USA
System Name ODIN
Processor AMD Ryzen 7 1800X @ 3.9 GHz (all cores)
Motherboard ASRock TaiChi X370
Cooling Cryorig Universal R1
Memory 16 GB G.Skill FlareX @ 2933 MHz 14-14-14-34
Video Card(s) Nvidia EVGA GeForce GTX 1070 SC 8 GB
Storage WD M.2 1TB SSD :: 4 TB RAID 1 Array of 2 drives
Display(s) Dell S2716DG 27" 144 Hz G-SYNC
Case NZXT H630
Audio Device(s) Onboard Audio
Power Supply Antec HCP 850 80+ Gold
Mouse Corsair M65
Keyboard Corsair K70 RGB Lux
Software Windows 10 Pro 64-bit
Benchmark Scores I don't benchmark.
#4
6990 peaks (max is lower) at 301W and 590 at 356W according to TPU reviews, so with two VGA configuration power consumtion (on the VGAs) would be 602W and 712W. I think there is plenty of room till 1000W that this PSU outputs.

In the past I have tested 6pin and 6+2pin PCIe connectors and got the same results on all of them, meaning that 6pin could draw as much power as 6+2 without any extra voltage drops. You see the two extra pins are just grounds. However some cards in order to unlock overclocking features (at least in an ancient 3870X2 I had this was the case) 6+2pin connectors were essential.
Ok. Makes sense. I agree. There seems to be no valid argument to not include those extra 2 wires on the 6-pin to make them 6+2 pin connectors. Especially at a $250 price point.
 

crmaris

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#5
they just wanted to cut cost down and did not bother to use different cabling set up on the two PSUs.