Okay... Lets start off. My opinions now after putting it through several days of what I would normally do plus some tests. I post some of my results now. My premise is... "what kind of performance I would have if I did the bare minimum in updating. Just replacing the CPU and a bios update. The reason for this is I know in my career that many of people have just done that... Plug and play without updates.
First of all the 5900OEM is the real deal. What I used as paste was the Artic MX5. My CPU cooler is a modified Hyper T2 with a dual fan setup. The fans are the Artic 92mm version and is rated @135TDP with the standard 1 fan setup. This setup worked great on my 1800X as well as my 3600 and it should work well with the 5900OEM. I really like the engineering of having a 2 tube setup acting like a 4 copper tube setup.
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With the Dual fan setup and using Artic 92mm fans it is essentially has the same or slightly better performance than a 1 - 120mm fan setup. Why do this? To be as compact as possible as well as the cooler doing double duty. The fans are pointing top to bottom instead of left to right as normally seen. This helps pull air into the case from the top and pushes the air downwards into the back of the video card which gets deflected/pulled into the 140mm fans on the side panel.
My computer case is a Corsair 500r with a 400r side panel. Again a hybrid for my rig. My cases as well as all that I build are made for function over style. I only run 2 - 140 mm Artic case fans on the side panel and the Corsair 120mm Case fan on the top back end and that's it. It's nothing fancy. It just works and works well.
IMHO... The 5900OEM is incredibly snappy and there was some good overall increases of frame rates while playing Overwatch. My go to game. I would play for 2 hours take a break and play for another 2 hours. Total time on the computer averaged 10 hours per day for this test.
On day 3, I decided to update all of my drivers and bios fan set up to see if there was any additional increase in performance.
Here are some of the results.
I took a screen shot and the best of the 3 days in the morning at 8AM@24c and at 5PM when the room reached 30c. No driver updates with these pictures. To be honest all of the data points were only off a few points here and there between each other. Nothing really showing out and going... "hmmmm". So to keep the pictures down I'll choose what I think was the best overall from the tests.
Morning 8AM @24c
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Around 5PM when the room hit's 30c on the average. The room where the computer is in the south wall sees the sun. Great during the winter. Not so great in the summer when the room temps can reach to 44-46c. Yes its a hot room... with the fans on....
5PM @30
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As you can see the Temp Numbers are pretty good just plopping in the CPU without any driver fixes. Pretty much at the end of the 3rd day I decided to update all of my drivers and play a few more games while testing my wattage from the wall.
10PM @26c
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With the updated Drivers and managing my fans IMHO made a difference in in cooling which meant better performance all around. I am extremely happy with the data that I gathered about this CPU and my major worries about overheating has been put to rest.
The hottest the CPU reached after continual for the AMD 5900OEM use was at 79c @30c for the testing was great as the highest I ever reached with the AMD 3600 was 78c @30c.
I have a August 20th snap shot of the AMD 3600 @ 12:54 AM for a comparison.
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Twice the core and thread count with pretty much same temp levels. With the updated drivers my MOS and my Chipset is overall the same or of less temps than my AMD 3600 setup. The temps on the CPU were overall higher (average 3 to 5c range) than the AMD 3600 but again still far below the safety levels of running the CPU and plenty of room to make some more modifications later down the road.
More data on the way but for now I need to get some sleep