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The thread which sometimes talks about RDNA2

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PSU ratings will be taking into account that most PSU's are really REALLY bad.

A good 650W - 700W should be fine for most non OCed systems (R5 3600 / 5600X or i5 10600k)
 
The 850w recommended is just to allow for people running bargain basement PSU's that will **** themselves if they run anywhere near their rated output. You'll be fine with a good quality lower wattage PSU.
 
There must be an error in Sapphire specs.
RTX 3080 320-watt + Core i9-10900K requires a 750-watt PSU.

Why does Sapphire want 850W PSUs for cards which are supposed to be more power efficient than RTX 3080? :confused:

Generous assumptions that the customers may be pimping their rigs with overclocks, fans and RGB.

Then add a generous margin above the maximum realistic power draw because the more overspec the PSU is the quieter it will run.
 
Recommended PSU is irrelevant, the only thing that matters is the power consumption of the GPU, a 300 Watt GPU will not require anything more than a high quality 600 Watt PSU, if you buy a £40 no name none efficiency rated PSU it will need to be "850 Watts" but who in here is daft enough to do that?

The recommendations are over the top because they have to assume you're an idiot and are going to power your £1000+ PC with a junk PSU. Don't do that.
 
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To power a 300 Watt GPU and something like a Ryzen 3000 or 5000 CPU this is the lower limit. This is acceptable. https://www.overclockers.co.uk/be-quiet-pure-power-11-600w-80-plus-gold-power-supply-ca-12y-bq.html

Don't get something like this.... https://www.overclockers.co.uk/kolink-core-series-700w-80-plus-certified-power-supply-ca-02q-kk.html
What if you have a Threadripper, a 3 m.2 drives, a 4 ssd and one mechanical hdd plus like 7 case fans? If 140mm ones
 
To power a 300 Watt GPU and something like a Ryzen 3000 or 5000 CPU this is the lower limit. This is acceptable. https://www.overclockers.co.uk/be-quiet-pure-power-11-600w-80-plus-gold-power-supply-ca-12y-bq.html

Don't get something like this.... https://www.overclockers.co.uk/kolink-core-series-700w-80-plus-certified-power-supply-ca-02q-kk.html

i have a EVGA SuperNOVA 650 G2, 80+ GOLD 650W

i think im going to try and get a 6800xt, are you saying my PSU is enough for it?


 
PSU ratings will be taking into account that most PSU's are really REALLY bad.

A good 650W - 700W should be fine for most non OCed systems (R5 3600 / 5600X or i5 10600k)

Agree with you they do over compensate for the rubbish PSU's out there ..a 2 x 8 pin card should not be using more than 375 watt
 
i have a EVGA SuperNOVA 650 G2, 80+ GOLD 650W

i think im going to try and get a 6800xt, are you saying my PSU is enough for it?

Yes, that's more than enough. Very high quality PSU.

I have an EVGA Supernova 650 GS.

Ryzen 3600
2070 Super (overclocked)
1 mechanical drive
1 M.2
2X SSD
AIO
1 120mm Fan
3X 140mm Fans

The PSU rarely gets warm enough to spin up its fan.
 
damn almost want to buy the LIAN-LI PC-O11DX Dynamic Mid-Tower so I can vertically mount these but I hear the temps are worse :confused::(
 
But the effective bandwidth of 6800 depends on the assumption that the Infinity Cache will still maintain a 58% hit rate in mining like it does in 4k gaming currently.
For perspective, if cache hit falls to 0% the effective bandwidth of navi drops to 512 GBps.

Some interesting read here:
https://www.vijaypradeep.com/blog/2017-04-28-ethereums-memory-hardness-explained

ethash_algorithm.png


Currently the DAG size is 3.49 GB, so a random cache of 128 MB can achieve a steady state hit rate of 3.7% on infinity cache compared to 58% in gaming workloads
 
ok thanks for this

No problem, your PSU is one of the best 650 Watt PSU's you can get, you don't need to worry about it unless you're going stupid with an overclocked 10900K and high end SLI / Crossfire.

You pay for what you get and you got one of the best on the market.
 
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