Help a first timer further OC fx8370 on M5A99FX Pro 2.0

introaether

Commendable
Mar 11, 2018
47
0
1,540
Hello. I am looking to take my OC a little further by means of fully understanding the concpets involved. I have some questions that I'd be very greatful of the community answering. My CPU-z readings are atthe bottom of OP.

1) When setting the Core clock (My fx 8370 is 4.0GHz by default - my current OC is 4.575MHz, 1.332v) - Does it make a difference how you achieve said clock? I have learned that there are two ways of increasing the Core clock; increasing the multiplier (Which I have left at 20.0), and/or increasing the Bus (which I have increased to 228).

The reason I am asking this question is because; Increasing the BUS also increases the; memory frequency, HT Link freq and the NB frequency, where as increasing the multiplyer ONLY increases the core, without effecting the RAM/NB. I can see how you would adjust those two things to finetune an OC, reaching the same core with lower bus setting by using the multiplier etc. Therefore, increasing clock without stability issues elsewhere (HT link, NB etc).

Is this how its done? Or, is there a benifit to reaching desired core freq one way or the other?

2) Fine tuning RAM, HT Link and NB freq. My fx 8370 (as far as i can see in bios, because its not black?) doesn't allow me to alter the multipliers of HT Link, NB and RAM. I am limited to choosing the preset ratios within the dropdown menu. These presets have big jumps from one setting to the next.

I have read that my NB Freq must be three times higher than my RAM. However, I am having to run my RAM at a lower speed than optimal, because I cant keep the NB stable. (At least I think thats the instabilty I am seeing). Is this a usual thing?

I have increased Voltage to the NB, but my temps are at a point where i am reluctant to go any higher, (72' Socket, 60' Core after 20 mins stable prime 95 blend)). So, as a trade off, I am forced to run my ram slower to achieve 3:1? Or in this scenario, is it best to just run everything as fast as individually stable, ignoring the 3:1 ratio?

3) I have read conflicting things regards performance gained by increasing the HT link and NB freq. What would you advise? Is one more important than the other?

4) I am having a little trouble searching the exact spec of my RAM. I no longer have the box to see the spec. Obviously, I am using CPU-Z, and In the SPD menu (slot 2 or 4) it says MAX Bandwith: PC3 12800 (800 Mhz).

Can I trust that this is the default Ram Speed, 800? (2x800) = 1600?.

If so, by default, my Ram should be set to 1600 and my NB to 2400?



MY CURRENT OC is;

4575 MHz at 1.332V (Temp: 72' 60').
Multiplier: x20.0
Bus: 228.8 MHz
Rated FSB: 2516 MHz

NB Frequency: 2516 MHz
DRAM Freq: 765 MHz
Voltage to NB: Will have to edit this is as I cant see BIOS right now!


Thanks for reading, regards.

Ps. My cinebench score (8threads) is 734. Is that good?
 

introaether

Commendable
Mar 11, 2018
47
0
1,540
FWIW

I have altered the bus and clock ratio to maintain a higher core frequency whilst not over doing the RAM, HT Link and NB.

Further reasearch led me to conclude that the HT link and NB frequency should be set the same on an fx8370, and the NB should be 3x your DRAM.

I couldny get the RAM/HT Link and NB stable (with the above rules) higher than 2600. It was probably the NB undervolted, but the 1.3v I am already feeding it seems enough. I did squeeze some extra core frequency though.

@ 4.637 GHz
1.332V
Ratio: 21.5
Bus: 215 MHz
Rated FSB: 2588.5 MHz
NB Freq: 2588.5 MHz
DRAM : 862.9 MHz
NB Voltage: 1.30V

The socket was getting borderline hot 74' after 30 mins of Blend Prime 95. Ive read so many conflicting vies on what the socket can ACTUALLY handle. I see 72' floating around, but also noted many users saying they run chips into the high 70's and even 80's with no issues.

When iI next render a Video, I'dd do so with HWM open and monitor the temps. I doubt they will climb over 72 with everyday use though. Core temp has not passed 59'.

Gaming with an R9 285 playing witcher 3 and Railway Empire hasnt seem socket temps go above 55, nor the core, so I think I'm happy with the result.

My cinebench score has increased from sub 700 to well over 740. Heaven bench has improved to 1390.

Only thing I havent looked into yet is the Ram Timings.

Is it better to overclock the frequency or adjust the timings?
 

introaether

Commendable
Mar 11, 2018
47
0
1,540
Strangely, after checking HWM, my clock had - at some point - ramped u to 4.85GHz. As far as I know I had removed all control for the Motherboard to alter clock and voltage, maybe i missed something?

System is very stable though, happy with the result.

FWIW - The Ram timing questoin:

The timings are important in conjunction with the frequency. What we are aiming to achieve is the highest freq with the lowest timings. Not neccessarily, the highest/lowest in either.

However, it is generally advised that for gaming, having a higher frequency is better. But, like much of what you read online, maybe that's just someones opinion!

Peace.
 

introaether

Commendable
Mar 11, 2018
47
0
1,540
Hey!

So, It's been a whole week and things have been fine. No crashes or freezes. Every day temps are fine too - Havene't seen the socket pas 62', or the core pass 55'. This is mainly gaming 'withcher 3'.

Still, I need to see if i can squeeze some extra out of the RAM, NB, HT Link ratio.

Also, the Core boost is still happening. It's getting up to 4.85MHz and still stable.