I read some pages of your topic and didn't find much about Z77 Pro3
which isn't even listed as a Z77 board. For sure there are some people who decide to buy something cheaper. I'm one of them
. I decided to share with you my experience with this budget board. Find my spec below:i5-3570K/i5-2500K, Crucial Ballistix Sport 2x4GB (2000 MHz email@example.com), 520HXEU, 6870
, ThermalRight MUX-120.
If you don't plan to have a Cross Fire or SLI (but its possible on mentioned board) and wouldn't like to reach 4.6+ GHz in OC this board is absolutly up to your needs. After month of using this board I found two issues. First problem is with VRM, there is 4+2 phases and for sure it's not enough for 2500K. Radiator of VRM is extreamly hot and CPU start throttle to 3300 MHz after about 10 minutes in Prime95 at 4500 MHz with +0.035v offset. If you do not fold or seti 24/7 you could live with that, i didn't notice throttling during normal usage like gaming or benchmarking. Probably my graphic card isn't so powerful to use full potential of 2500K.
I thought that if TDP of 2500K is 95 W and 3570K has 77 W maybe if I exchange CPU I will stop facing throttling under load. I sold the 2500K, bought 3570K and .... bought some time until 3570K start to throttle
about 20 minutes of heavy load (Prime95). So, for sure VRM on Pro3 and brothers like Pro4 or Pro4-m isn't sufficient for real OC. Moreover, if you need only computer to play games and mulimedia as me, you will not exepriance that issue. For sure it's a matter of that how you ventilate your case, my is very silent, few 12 cm fans on 7-9v, maybe this a reason.
I overclocked my i5-3570K to 4500 MHz at 1.196 (reading from CPU-Z) offset +0.045 v, PLL overvoltage disabled and PLL voltage lowered to 1.7... v. It's stable as rock, except throttling which start to appear when VRM is overheating.
That's a pity that TweakTown didn't notice VRM problem while they were creating an review of Pro3. I based my choice on their opinion.
Second thing is issue which i didn't solve yet and didn't find any answer on the forum. My usb 2.0 are behave, time to time, like a "new equipment" detected. It looks like I'm using mouse and suddenly cursor stops, mouse's red lens shuts down, 3 second and appear. After that mouse is fully functional. The same with keyboard. Maybe motherboard is broken some way, I didn;t find out yet. If you exepriance something like that and solve it, please share your knowlage becase its very annoying
Except this two things it's very good motherboard with well made UEFI.
Last thing, if you plan to buy 3570K do not spend too much money for fancy cooler, its pointless. This is impossible to cool down. Heat is inside the cpu and is not planning to go outside
. My cooler is not even warm during Prime95 but temperature is about 80C on readings.
Sorry for such a long letter, I hope this informations will help somebody to choose motherboard or explain why CPU is thorttling.