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Why buy a 1000w power supply?

haunebu
By haunebu
in Power Supplies
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I am building my new system and i have planned on buying a 1000w power supply for it. My question is: "Is a 1000W power supply really necessary or am I just wasting my money?" Is there any use for having a 1000w power supply? What could it do that a normal 600w or 750w power supply can't do?

I was buying a 1000w power supply because I want my new PC to last for awhile and not have any problems. There is really no specific reason i am getting one other than to have a more powerful computer. So i am buying top end products. But i am thinking spending $200 on a 1000w power supply might be over kill. What do you think? 

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what are your specs?. For gaming rig you are usually fine with 450w/550w unit. 

QUOTE ME  FOR ANSWER.

 

Main PC:

Spoiler

|Ryzen 7 3700x, OC to 4.2ghz @1.3V, 67C, or 4.4ghz @1.456V, 87C || Asus strix 5700 XT, +50 core, +50 memory, +50 power (not a great overclocker) || Asus Strix b550-A || G.skill trident Z Neo rgb 32gb 3600mhz cl16-19-19-19-39, oc to 3733mhz with the same timings || Cooler Master ml360 RGB AIO || Phanteks P500A Digital || Thermaltake ToughPower grand RGB750w 80+gold || Samsung 850 250gb and Adata SX 6000 Lite 500gb || Toshiba 5400rpm 1tb || Asus Rog Theta 7.1 || Asus Rog claymore || Asus Gladius 2 origin gaming mouse || Monitor 1 Asus 1080p 144hz || Monitor 2 AOC 1080p 75hz || 

Test Rig.

Spoiler

| Ryzen 5 3400G || Gigabyte b450 S2H || Hyper X fury 2x4gb 2666mhz cl 16 ||Stock cooler || Antec NX100 || Silverstone essential 400w || Transgend SSD 220s 480gb ||

Just Sold

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| i3 9100F || Msi Gaming X gtx 1050 TI || MSI Z390 A-Pro || Kingston 1x16gb 2400mhz cl17 || Stock cooler || Kolink Horizon RGB || Corsair CV 550w || Pny CS900 120gb ||

 

Tier lists for building a PC.

 

Motherboard tier list. Tier A for overclocking 5950x. Tier B for overclocking 5900x, Tier C for overclocking 5800X. Tier D for overclocking 5600X. Tier F for 4/6 core Cpus at stock. Tier E avoid.

(Also case airflow matter or if you are using Downcraft air cooler)

Spoiler

 

Gpu tier list. Rtx 3000 and RX 6000 not included since not so many reviews. Tier S for Water cooling. Tier A and B for overcloking. Tier C stock and Tier D avoid.

( You can overclock Tier C just fine, but it can get very loud, that is why it is not recommended for overclocking, same with tier D)

Spoiler

 

Psu tier List. Tier A for Rtx 3000, Vega and RX 6000. Tier B For anything else. Tier C cheap/IGPU. Tier D and E avoid.

(RTX 3000/ RX 6000 Might run just fine with higher wattage tier B unit, Rtx 3070 runs fine with tier B units)

Spoiler

 

Cpu cooler tier list. Tier 1&2 for power hungry Cpus with Overclock. Tier 3&4 for overclocking Ryzen 3,5,7 or lower power Intel Cpus. Tier 5 for overclocking low end Cpus or 4/6 core Ryzen. Tier 6&7 for stock. Tier 8&9 Ryzen stock cooler performance. Do not waste your money!

Spoiler

 

Storage tier List. Tier A for Moving files/  OS. Tier B for OS/Games. Tier C for games. Tier D budget Pcs. Tier E if on sale not the worst but not good.

(With a grain of salt, I use tier C for OS myself)

Spoiler

 

Case Tier List. Work In Progress. Most Phanteks airflow series cases already done!

Ask me anything :)

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1 minute ago, haunebu said:

I am building my new system and i have planned on buying a 1000w power supply for it. My question is: "Is a 1000W power supply really necessary or am I just wasting my money?" Is there any use for having a 1000w power supply? What could it do that a normal 600w or 750w power supply can't do?

I was buying a 1000w power supply because I want my new PC to last for awhile and not have any problems. There is really no specific reason i am getting one other than to have a more powerful computer. So i am buying top end products. But i am thinking spending $200 on a 1000w power supply might be over kill. What do you think? 

usually people choose power supplies after theyve chosen their components, if youre planning to use a threadripper, watercooled and overclocked with 2 or more power hungry graphics cards then i could see a 1000w psu being a good option

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1. Render machines with multiple GPUs

2. Those aiming for best efficiency (on top of the highest 80+ rating)

3. HEDT platform users ($200 a PSU doesnt differ to them as a $100 one) along with multiple GPUs

4. Extreme overclockers (tho they usually aim for more, just in case there's a multiGPU competition going on)

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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7 minutes ago, haunebu said:

I am building my new system and i have planned on buying a 1000w power supply for it. My question is: "Is a 1000W power supply really necessary or am I just wasting my money?" Is there any use for having a 1000w power supply? What could it do that a normal 600w or 750w power supply can't do?

I was buying a 1000w power supply because I want my new PC to last for awhile and not have any problems. There is really no specific reason i am getting one other than to have a more powerful computer. So i am buying top end products. But i am thinking spending $200 on a 1000w power supply might be over kill. What do you think? 

Anyone that needs a 1000W PSU, should buy a 1000W PSU. Anyone that does not need a 1000W PSU, should not get a PSU.

Usually it's only needed to get 1000W+ if you are using HEDT with a high end GPU (and overclocking a LOT) or if you are running HEDT + multiple GPU's.

 

For most people, a good 750W PSU will do the same as a good 1000W PSU.

 

P.S. keep in mind, higher wattage PSU's are usually physically larger. So do check if you case will fit the PSU you're thinking of getting!

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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At one time, multi-gpu had noticeable benefits and 300-400 watt gpu were a thing.  Back then it wasn't that hard to need 1000 watts.  Now you would need to be building a very special purpose rig to hit that.  Many accelerator(gpu/compute/fpga/ect) cards and or cpu would do it.  Anyone buying i9-9900k and dual 2080 ti for example, or folding at home rig with quad gpu, would need around that wattage.  Single gpu and gpu won't, without hard mods and LN2 at least.

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A power supply rated at 1000w means it can deliver if needed up to 1000w, but less if the load demands less.

If had say 12V 1000w supply then the current capability, max of what can be drawn, is 1000/12=83Amps, but it will be putting out this power and amps only if the load is such to demand it. In this case a load of 12V/83A=0.14 Ohms. If the load is higher resistance then less current will be needed and the supply will be supplying less power.

The 1000w or whatever the rating means the max wattage the supply can deliver.

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