Mosfet coolers for a sabertooth 990fx, questions, decisions, what fits, what's optimal.. whats cheap?

Toggle sidebar Toggle sidebar
D

DavidM012

Distinguished
Feb 4, 2016
1,032
172
19,540
Decisions, decisions.

What would be best? The Enzotech copper mosfets + thermal epoxy

Or

Thermalright Hr-09s or u type 1, 2 or 3? There's a type 3 going on ebay for a fiver which is discontinued on scan.co.uk where the type 2 is a tenner with free postage

I've read that it has some sort of adjustable mounting system but some people have problems getting this to fit.

Plus another question next to that, if I take the stock asus vrm/mosfet cooler off it has a heatpipe going to another chip

would I then also need to buy another cooler for that chip as well? Since the stock mosfet/chipset cooler are attached via a heatpipe on the stock asus cooler. It looks like on the diagrams it's the chipset heatsink that is connected to the mosfet cooler by a heatpipe.

Also wondering if there is any other alternative to the enzotech .

Could I apply some sort of large long flat heat spreader and stick my 125w arctic a11 heatsink on top of that? Guess it would be tricky to stick down a heat spreader without getting any epoxy down the sides of the mosfets chips & contacting the circuit pins.

Or anything else?

Questions questions, details, details. Enzotech claims to be the best. I kind of got it into my head that I want a flat surface to stick the a11 to on top of a mosfet cooler but the thermalright is aluminium where I would probably prefer a copper cooler.

Still wondering if I should scrape off the adhesive and use thermal epoxy instead?

What's best?
 
Last edited:
Solution
CountMike
Package temp is a bit misleading because it's measured in the back of the processor and could be lowered by placing a fan at the back of MB where the socket is located but that may not help any.

Now when you got it stable you can try for a bit more. I think that 4.7GHz should be easily attainable on that setup. Max voltage for those processors is 1.5v so you have spare V to play with as long as you control temps.
Sort by date Sort by votes
D

DavidM012

Distinguished
Feb 4, 2016
1,032
172
19,540
Well no but a cooler system might get rid of the spike on the package temp? I am getting lock ups at higher clocks...

and if I push the vcore any more then the package is going to spike to 80c

so.. before I raise the vCore maybe I should cool it more first?

The other thing I could try is just a lower memory clock base, 1333mhz, and multiply that. There is a sticky thread warning against the perils of an fsb overclock that is greater than the cpu rating.

That I just re-read.

I guess another way of looking at the question is -

Would I be able to get a higher overclock more stable with better cooling? Supposing Vcore is at the best level it can be and other conditions are near-optimal I guess the question is, 'is more cooling always better'?
 
Upvote 0 Downvote
D

DavidM012

Distinguished
Feb 4, 2016
1,032
172
19,540
This time I reset everything back to auto and then hit the oc tuner. It set the fsb to 216/ddr3 1748 yielding 4.5ghz. I then just added 0.5 to the cpu multiplier to hit 4.687ghz & the package temp. has stabilized to 43c in the stress test.

vcore is only... 1.308 so I am going to try sort of 1.36-138 manually as I increment the cpu clock multiplier. 1.4 starts to get quite warm and 1.45vcore is definitely spiking the package temp.

1.368 vcore @ 4.768ghz gets the package up to 61c but takes longer to get there. The llc is all on auto/optimized.

I think some more cooling somewhere on this board might be called for to get better thermals at higher frequencies. 4.6-7@43c is good I thought. But it then spikes when you have to raise the vcore even just a touch to 1.35 to get past 4.75ghz.

Less than 1.35 vcore keeps the package temp on my system to stabilize in the mid 40's on 100% stress test in cpu-z. If it is manually set to 1.35 vcore can spike up to 1.38/58c. It stabilizes at 58c at 4.690ghz if the vcore is 1.356. The system idles down to 1.332vcore and the package min is merely 19c. So activity on the cpu can gain more than 42c on the package temp.

I guess what was happening in the games were that cpu was runnng maybe sort of 50-75% ish but on heavy scenes spiked to over 75% and that was where I was locking up at the higher frequencies.

I just turned up the FSB to 1866mhz which oc'd is ddr3 2015mhz, switched on the turbo core and HPC in advanced->cpu config
stressed it again, set the vcore to auto now 1.308 determines the system bios and the cpu-z 100% stress test only went to 44c. Bench was 4520ish multi, creeping up on the 8150 and the single core was 1362.

Seems like this is the point where things are stable.

Anything else I can do to get the package temp down?

I was thinking well maybe I could get one more notch up to 4.75 if I vcore to 1.34 but 1.35 is where the spiking begins.
 
Upvote 0 Downvote
CountMike

CountMike

Titan
Oct 31, 2015
33,782
3,152
147,990
Package temp is a bit misleading because it's measured in the back of the processor and could be lowered by placing a fan at the back of MB where the socket is located but that may not help any.

Now when you got it stable you can try for a bit more. I think that 4.7GHz should be easily attainable on that setup. Max voltage for those processors is 1.5v so you have spare V to play with as long as you control temps.
 
Upvote 0 Downvote
Solution
D

DavidM012

Distinguished
Feb 4, 2016
1,032
172
19,540
I've found another 40mm fan and rested it above the top ram clips and if I can add an image here it shows the package at 35c max now and I've found another 40mm fan that I could place behind the socket & I've just soldered it on to a molex header. That gives me a total of 3 40mm fans 4 80mm fans 2 12inch fans and the arctic xTreme 12 inch fan and the fan off the amd stock cooler and the fan off the old a11 cooler. 12 fans in total.

vcore is 1.332v @ 4.689ghz. Now I think I can push the vcore a bit more again and it if gets past my confort zone I've still got a fan to stick down the back. More simple than taking off the cpu heatsink & vrm/chipset cooler to try and get the mosfet cooler on, might be too short anyway.
 
Upvote 0 Downvote
grimsin

grimsin

Reputable
Dec 7, 2014
192
0
4,710
if you buy a new gpu a 4 core amd will be bottlenecking it drastically, even a oc'd 8 core will bottleneck a gtx 970 if the game is cpu intensive. at 1080 ultra on bf4 my gpu wont go to 100%if i play at 1440p then it goes to 100%.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom