Question Which gpu with a 7800x3d. Thinking either 7900xt or maybe nvidia.

[Chris1978cdb]

I currently have a 7800x3d and a msi mag b650 tomahawk.wifi motherboard I will.be buying some g skill flare x5 series 6000mhz ddr5 ram soon. Question is I will.be using onboard gpu until I save for a new gpu. Which one should I go for I was thinking 7900xt or maybe should I go for nvidia not really sure I want to mainly game at 4k as I have a 48 inch lg oled as the display and want to use 4k 120hz hdmi. If you could recommend a good gpu that would be good as so many choices at the moment

 

[Aeacus]

and want to use 4k 120hz hdmi.

In this case; there is only one option: RTX 4090.

And even then, RTX 4090 won't quite do 120 FPS on 4K;

Enable Ray Tracing and you'll get even less FPS;

Source: https://www.tomshardware.com/pc-components/gpus/nvidia-geforce-rtx-4080-super-review/2

So, either fork out money for RTX 4090 + at least 1200W PSU (while 1600W PSU is preferred) which will cost easy 2000 USD (GPU and PSU combined), OR lower your expectations.

 

[Chris1978cdb]

In this case; there is only one option: RTX 4090.

And even then, RTX 4090 won't quite do 120 FPS on 4K;

Enable Ray Tracing and you'll get even less FPS;

Source: https://www.tomshardware.com/pc-components/gpus/nvidia-geforce-rtx-4080-super-review/2

So, either fork out money for RTX 4090 + at least 1200W PSU (while 1600W PSU is preferred) which will cost easy 2000 USD (GPU and PSU combined), OR lower your expectations.

Thanks for the quick reply was thinking of 7900xtx as its cheaper to be honest. Would a 850watt psu be enough and if so what one would you recommend ?

 

[mc_spaceman]

currently there are only 2 gpu's capable of running ultra settings at 4k~120hz. Obviously both will have their own individual pros and cons. price point; well theres a huge step between the 2.. the 7900xtx at about $1400usd, and the 4090 at about $2400. at the end of the day it is really your own personal choice and preference.

https://gpu.userbenchmark.com/Compare/Nvidia-RTX-4090-vs-AMD-RX-7900-XTX/4136vs4142

Radeon 7900xtx - Only probem i have read about is that "raytracing" seems to occasionally get a touch choppy at 4k~120hz settings.
Rtx 4090 - the only problem i have read about is due to nvidia's lack of end user support for drivers that are consistently crashing

myself i prefer only 2 lines/manufacturers. MSI GamingX, and Asus TUF/ROG. we all have our personal preferences as to our go to hardware.

e/

7900xtx would require a minimum of 800-850w psu (3x 8 pin connectors) and would maintain an idle usage of approximately 350-400w. , and the 4090 would require a 850-1000w psu, (1x16pin connector) and would maintain an idle usage of approximately 450w.

 

[Aeacus]

Would a 850watt psu be enough and if so what one would you recommend ?

850W unit will do.

As of which, any of these good quality units will do;
pcpp: https://pcpartpicker.com/products/compare/jWFXsY,26rRsY,mW4Ycf,9RfnTW/

and the 4090 at about $2400.

You're 500 bucks off the mark. RTX 4090 starts at ~1900 USD,
amazon: https://www.amazon.com/ASUS-GeForce-Graphics-DisplayPort-TUF-RTX4090-O24G-GAMING/dp/B0BGV6LQYR

 

[Chris1978cdb]

currently there are only 2 gpu's capable of running ultra settings at 4k~120hz. Obviously both will have their own individual pros and cons. price point; well theres a huge step between the 2.. the 7900xtx at about $1400usd, and the 4090 at about $2400. at the end of the day it is really your own personal choice and preference.

https://gpu.userbenchmark.com/Compare/Nvidia-RTX-4090-vs-AMD-RX-7900-XTX/4136vs4142

Radeon 7900xtx - Only probem i have read about is that "raytracing" seems to occasionally get a touch choppy at 4k~120hz settings.
Rtx 4090 - the only problem i have read about is due to nvidia's lack of end user support for drivers that are consistently crashing

myself i prefer only 2 lines/manufacturers. MSI GamingX, and Asus TUF/ROG. we all have our personal preferences as to our go to hardware.

Yeah amd is the way I wanna go as I can't justify the high cost of 4080 or 4090, I still not built the pc yet as I am buying a new item every month. I guess I will use onboard until I have made the right choice regarding the gpu I might have to go with a 1440p due to money thanks for the info

850W unit will do.

As of which, any of these good quality units will do;
pcpp: https://pcpartpicker.com/products/compare/jWFXsY,26rRsY,mW4Ycf,9RfnTW/


You're 500 bucks off the mark. RTX 4090 starts at ~1900 USD,
amazon: https://www.amazon.com/ASUS-GeForce-Graphics-DisplayPort-TUF-RTX4090-O24G-GAMING/dp/B0BGV6LQYR

What about this psu

https://www.amazon.co.uk/Corsair-Le...su&qid=1707660720&sprefix=850+,aps,271&sr=8-3

 

[Aeacus]

What about this psu

https://www.amazon.co.uk/Corsair-Le...su&qid=1707660720&sprefix=850+,aps,271&sr=8-3

It's one of the 4 i linked; Corsair RMx 850W. Good quality unit.

 

[mc_spaceman]

Yeah amd is the way I wanna go as I can't justify the high cost of 4080 or 4090, I still not built the pc yet as I am buying a new item every month. I guess I will use onboard until I have made the right choice regarding the gpu I might have to go with a 1440p due to money thanks for the info

What about this psu

https://www.amazon.co.uk/Corsair-Levitation-Compatibility-Reliabile-Capacitors/dp/B0913FLJDT/ref=mp_s_a_1_3?crid=4UZ7P0FR0HPL&keywords=850+watt+psu&qid=1707660720&sprefix=850+,aps,271&sr=8-3

I wouldnt settle with the bare bones wattage rating.. i would future proof the build and go with a 1000w psu that will not have to work as hard.
as an example.. it is about $30 difference in price to go up to the 1000w psu over the 850..
https://www.amazon.ca/CORSAIR-Serie...id=1707661258&sprefix=1000,aps,79&sr=8-5&th=1

 

[Chris1978cdb]

I wouldnt settle with the bare bones wattage rating.. i would future proof the build and go with a 1000w psu that will not have to work as hard.
as an example.. it is about $30 difference in price to go up to the 1000w psu over the 850..
https://www.amazon.ca/CORSAIR-SeriesTM-RM1000x-Modular-Supply/dp/B0BP8B6M7Y/ref=sr_1_5?crid=BWHQF938OM7T&keywords=1000w+psu&qid=1707661258&sprefix=1000,aps,79&sr=8-5&th=

Yeah thinking of this one

https://www.amazon.co.uk/MSI-MPG-A1...u&qid=1707661664&sprefix=1000w,aps,276&sr=8-5 or

https://www.amazon.co.uk/Corsair-RM...u&qid=1707661664&sprefix=1000w,aps,276&sr=8-4

 

[mc_spaceman]

Yeah thinking of this one

https://www.amazon.co.uk/MSI-MPG-A1000G-PCIE5-Supply/dp/B0BTQY6F9Q/ref=mp_s_a_1_5?crid=2TUWVI2U0T7X6&keywords=1000w+psu&qid=1707661664&sprefix=1000w,aps,276&sr=8-5 or

https://www.amazon.co.uk/Corsair-RM1000e-Modular-Low-Noise-Supply/dp/B0BYL3MPDC/ref=mp_s_a_1_4?crid=2TUWVI2U0T7X6&keywords=1000w+psu&qid=1707661664&sprefix=1000w,aps,276&sr=8-4

if you are opting for corsair; i would advise to go with their RMX line.. for better overall performance and cooling

RMe ~ Taiwan built capacitors, 120mm cooling fan, smaller housing
RMx ~ Japan built capacitors, 140mm cooling fan. slightly larger housing

 

[Chris1978cdb]

if you are opting for corsair; i would advise to go with their RMX line.. for better overall performance and cooling

RMe ~ Taiwan built capacitors, 120mm cooling fan, smaller housing
RMx ~ Japan built capacitors, 140mm cooling fan. slightly larger housing

Thanks will go with this one then
https://www.amazon.co.uk/Corsair-Le...u&qid=1707662184&sprefix=1000w,aps,276&sr=8-3

 

[Aeacus]

I wouldnt settle with the bare bones wattage rating.. i would future proof the build and go with a 1000w psu that will not have to work as hard.

RX 7900 XTX is 355W GPU, ~410W at peak.
R7 7800X3D is 120W CPU, with PPT at 162W.

Add the rest of the system to it at ~100W and total would be ~672W, making 850W unit more than enough, with good OC headroom.

So... where comes this "bare bones wattage rating" you're talking about? 🙄

 

[1LiquidPC]

Though different spec wise, my AMD build in signature run fine with a Corsair SF750 PSU, 7950X and 7900XT. 850W in your case would be plenty as others have mentioned.

 

[mc_spaceman]

RX 7900 XTX is 355W GPU, ~410W at peak.
R7 7800X3D is 120W CPU, with PPT at 162W.

Add the rest of the system to it at ~100W and total would be ~672W, making 850W unit more than enough, with good OC headroom.

So... where comes this "bare bones wattage rating" you're talking about? 🙄

I was merely meaning that in the terms that i personally never push any of my power supplies over the 3/4 power capacity threshold of the psu. once everything is added yes it sits around 675w. the less the power supply has to work, theoretically the longer it will last. i never said an 850 wouldnt work. just my personal opinion that i never recommend a psu with a power draw within 150w of its capacity.

 

[Aeacus]

just my personal opinion that i never recommend a psu with a power draw within 150w of its capacity.

In my opinion, 100W extra is good enough, 150W extra even more so. But if you go with the route of 200+W extra, you may run into PSU efficiency issues.

PSU's are most efficient when load on them is kept between 50% to 80% of their total wattage capacity. So, for 850W unit, that means load between 425W to 680W, which OP's planned build will fall nicely into.
Also, power consumption calculations are peak power draw, which can only happen if OP utilized CPU and GPU 100%. Normal build rarely, if ever, utilize CPU and GPU on 100% load, whereby realistic power consumption for the build during gaming would be ~550W.

 

[Chris1978cdb]

In my opinion, 100W extra is good enough, 150W extra even more so. But if you go with the route of 200+W extra, you may run into PSU efficiency issues.

PSU's are most efficient when load on them is kept between 50% to 80% of their total wattage capacity. So, for 850W unit, that means load between 425W to 680W, which OP's planned build will fall nicely into.
Also, power consumption calculations are peak power draw, which can only happen if OP utilized CPU and GPU 100%. Normal build rarely, if ever, utilize CPU and GPU on 100% load, whereby realistic power consumption for the build during gaming would be ~550W.

So an 850watt unit is enough for a 7800x3d and 7900xtx

 

[Aeacus]

So an 850watt unit is enough for a 7800x3d and 7900xtx

Yes. You'd even have OC headroom.

 

[Chris1978cdb]

Yes. You'd even have OC headroom.

Okay that is good to know as a lot of people have advised me to have a 1000watt psu

 

[Aeacus]

Okay that is good to know as a lot of people have advised me to have a 1000watt psu

Well, none of those people are paying for the cost difference between 850W and 1000W PSU, so, it's easy to suggest more expensive hardware. I, on the other hand, doesn't suggest more expensive hardware "just because". I suggest what is needed. If you want to go with beefier PSU than what build needs - that's on your own accord.

Another thing is, if those "other people" even make a wattage calculation in the first place. 🤔 Sure, it takes a bit of effort to look up component power draws (including peak draws), but end result would be more accurate than just cookie cutter reply: "if you have RX 7900XTX, buy 1000W PSU".