Exhaust for Ryzen 1700 Wraith CPU cooler

[Morrowless]

I'm building a system with Fractal Design Define R5 case and Ryzen 1700. For CPU cooler I have the stock Wraith, or Coolermaster Hyper TX3 EVO.
My aim is to get positive pressure, so I have 3 140mm Noctua NFA14 fans, intake at front and bottom, and 1 for exhaust. I could also add 2 Define R5 stock fans but I've read 3 is sufficient.

I'd prefer to use the Wraith but it blows air to the side, not back. Would a back exhaust work here, or is it much better to use the TX3?

I'm planning to OC just a little, hoping to get ~55c max with 1700 at 3.4MHz or so.

 

[UsandThem]

I'm building a system with Fractal Design Define R5 case and Ryzen 1700. For CPU cooler I have the stock Wraith, or Coolermaster Hyper TX3 EVO.
My aim is to get positive pressure, so I have 3 140mm Noctua NFA14 fans, intake at front and bottom, and 1 for exhaust. I could also add 2 Define R5 stock fans but I've read 3 is sufficient.

I'd prefer to use the Wraith but it blows air to the side, not back. Would a back exhaust work here, or is it much better to use the TX3?

I'm planning to OC just a little, hoping to get ~55c max with 1700 at 3.4MHz or so.

Both would work fine. The 140mm exhaust will take care of the CPU heat regardless if you use the Wraith or TX3 EVO. Although the TX3 EVO isn't known for being a robust cooler. I don't think it will keep you under 55c.

In this review, at stock settings with a Noctua NH-U12S at idle they were 37c and 46c at load. That cooler performs better than your TX3 EVO. Unfortunately when they overclocked it, they moved to a Corsair AIO cooler. At load they hit 60c:

http://www.legitreviews.com/amd-ryzen-7-1700-overclocking-best-ryzen-processor_192191/10

 

[HerrKaLeu]

For my system I found also exhausting through the rear top lowers CPU by 1-2°C. But I doubt your 65W CPU will notice a difference.

 

[Morrowless]

Thanks. Decided to go with the stock cooler. Getting 35c idle, 60c load which sounds about right. Not happy with the load temp however...

 

[Valantar]

Thanks. Decided to go with the stock cooler. Getting 35c idle, 60c load which sounds about right. Not happy with the load temp however...

Why not? 60c under full load with a stock cooler is a very decent result, and nowhere near detrimental to anything in your system. If you want a cheap cooler that works better, Cryorig seems to be the go-to maker for those at the moment.