evga 650W question

peterhc · 1 Sep 2019 at 14:35

Hi

Is 650w PSU enough for 9900k @5Ghz plus 1080ti 3 SSD and 2hdd, and like 5 fans?

thanks

EsaT · 1 Sep 2019 at 20:36

That CPU is capable to hogging 250W and non-reference 1080 Tis are 300W power draw cards.
So would start from 750W PSU.

peterhc · 1 Sep 2019 at 20:52

I thought cpu was like 95W? hm..

EsaT · 1 Sep 2019 at 21:12

peterhc said:
I thought cpu was like 95W? hm..

Intel "misleads".
If BIOS chases Intel's hyped high clocks, instead of strictly following PR BS TDP and cooling can keep temps under control, 9900K reaches toward 200W power consumption when fully loaded without any manual overclocking.
And overclocked to 5GHz it's max 250W space heater.

It's quad core Skylakes which max around 100W when fully loaded.
Skylake's second rebranding alias Coffee Lake with six cores already pushed fully loaded max power draw to 150W.
Another two cores more naturally rises that further.
Which is the only thing what can be expected when neither architecture or manufacturing node has moved forward.

the Core i9-9900K gets super hot faced with Prime95 and AVX instructions (205W stock, 250W overclocked), exceeding the specified TDP. We measured 137W (232W) during the Cinebench test, and we topped 145W (241W overclocked) under the larger Blender workload. We even pushed past 120W (198W overclocked) with various CAD plug-ins for Creo and SolidWorks.
https://www.tomshardware.com/reviews/intel-core-i9-9900k-9th-gen-cpu,5847-11.html

peterhc · 1 Sep 2019 at 22:02

EsaT said:
Intel "misleads".
If BIOS chases Intel's hyped high clocks, instead of strictly following PR BS TDP and cooling can keep temps under control, 9900K reaches toward 200W power consumption when fully loaded without any manual overclocking.
And overclocked to 5GHz it's max 250W space heater.

It's quad core Skylakes which max around 100W when fully loaded.
Skylake's second rebranding alias Coffee Lake with six cores already pushed fully loaded max power draw to 150W.
Another two cores more naturally rises that further.
Which is the only thing what can be expected when neither architecture or manufacturing node has moved forward.

the Core i9-9900K gets super hot faced with Prime95 and AVX instructions (205W stock, 250W overclocked), exceeding the specified TDP. We measured 137W (232W) during the Cinebench test, and we topped 145W (241W overclocked) under the larger Blender workload. We even pushed past 120W (198W overclocked) with various CAD plug-ins for Creo and SolidWorks.
https://www.tomshardware.com/reviews/intel-core-i9-9900k-9th-gen-cpu,5847-11.html

that's bad news maybe I should look at ryzen9? |But I only want CPU for gaming and a small portion of lightroom/photoshop. Or I will wait... dunno

lee32uk · 1 Sep 2019 at 22:10

peterhc said:
that's bad news maybe I should look at ryzen9? |But I only want CPU for gaming and a small portion of lightroom/photoshop. Or I will wait... dunno

Those power consumption figures are worst case scenario. If you are just gaming and doing lightroom/photoshop then 650W should be more than fine. Nothing to lose by trying it anyway. Worse case scenario is the system shuts down if the psu can't provide enough power.

peterhc · 3 Sep 2019 at 10:11

W

lee32uk said:
Those power consumption figures are worst case scenario. If you are just gaming and doing lightroom/photoshop then 650W should be more than fine. Nothing to lose by trying it anyway. Worse case scenario is the system shuts down if the psu can't provide enough power.

so should I go with r9 3900x instead of 9900k, and keep it stock with that psu?

lee32uk · 3 Sep 2019 at 12:49

peterhc said:
W

so should I go with r9 3900x instead of 9900k, and keep it stock with that psu?

You would probably be fine with the R7 3700X if you are only doing gaming and occasional lightroom/photoshop. It is still an 8 core cpu same as the 9900K but for a lot less money.

peterhc · 4 Sep 2019 at 20:58

lee32uk said:
You would probably be fine with the R7 3700X if you are only doing gaming and occasional lightroom/photoshop. It is still an 8 core cpu same as the 9900K but for a lot less money.

thanks