שלום חשבתי לכתוב פה את כל מה שעשיתי באוברקלוקינג של המחשב שלי בתקווה שזה יוכל לעזור לאחרים ו\או לקבל תגובות בונות

אני מצטער אבל כתבתי את זה באנגלית וזה ארוך... אבל מי שקנה או שמתכנן לקנות מחשב בסגנון הזה מומלץ ללמוד מניסיון של אחרים אז הנה:

---OVERCLOCKING---

SYSTEM

i5 760 2.8ghz/noctua NH-D14

gigabyte mobo

gigabyte GTX465 1GB

Kingston Value ram 2x2GB

CM GX 550W PSU

generic case

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Those are my specs right now

When i bought the pc i didnt get the noctua and PSU

Those are my experiances:

I first tried to work with the pc with out changing anything and without buying a cooler, just installing all properly and keeping all settings on default.

Results were very bad to say the least. CPU would reach 84-89c on 100% load and 47-50c on idle. and high demanding games like bfbc2 would crash.

This was very strange to me, because i havent even started to OC. all in auto settings. so i started to look into things.

First thing i noticed was that cpu is already overclocking itself when there is load. this is because of Intel Turbo, its on by default and it raises your cpu multiplayier to x22 under load instead of x21.

I witeness programs that made cpu go way off x22 multiplayer, going to x23 x24 x24.5(XS bench in real temp is example). this is also very starnge because most programs just used x22.

This feature needs to be disabled. i dont want to oc my cpu to 3.8ghz and having it ocing itself to 4.3+ when it feels like it.

After that i discovered the major problem in the "Auto" settings gigabyte give with their mobo, its the voltage settings.

god knows where they get their numbers. but on auto the voltage sits on about 1.25v(!!) and on top of that when turbo kicks in it turns up the voltage even more.

That makes temps go really really crazy specially with an ambient temp of 31-35c like i have here.

I quickly set the voltages to fixed number and set it as low as i can. To my surprise i was able to down the voltage ALOT. pc was running stable when corev is around 1.08 without overclocking.

This dratically reduced the temperatures, both idle and load, but specially on load. i also improved the layout inside the case to allow better airflow which also helped drop 1-2c.

So it was time to start OC. It wasnt hard and i got my cpu to work on 3.9ghz atm, ofc after buying/installing noctua cooler and further reducing the temps.

I had to increase voltages ofcourse 1.08 isnt going to be enogh. but the fact is that i didnt even get near the voltage value gigabyte placed on AUTO, which was sending the cpu to temps like the sun.

you can actually work with 1.13 on this clock, but to get things really stable over time i had to go up to 1.1635v.(cpu-z shows only 1.152)

Now temps are : 43c idle - 75c 100% on intel burn test, 72c on prime.

Note that is this due to insane ambient temps of 31c-36c. When i turn on AC in the room temps change alot.

Temps with AC cooling the room to livable temperatures: 37c idle temp - 69c 100% load on intelburntest 65c on prime.

This is also matching with temps showen in "System temperature" sensor, which shows a drop of 7-8c from 38c to 30c when room gets cooled with AC.

Memory multiplayier had to be decearsed because of the cheap ram i have, even with lower multiplyer its going at almost 1500mhz right now, so this ram isnt so bad.

With these temps Im sure i can OC more, but AC is very expensive and it cant be on all time.

I was also intrested in Intels feature to recude core clock and voltage when cpu is idle, its a nice feature that is enabled in default settings. Makes your cpu have really cool temps when idling by dropping your clock/voltage settings.

Sadly i didnt found this feature to work so well, it will increase your clock to the max only when cpu is on high load, if some program/game uses only 20% of your cpu, it wont see a reason to increase your clock/voltage to the max.

So if you want your casual programs and everyday work to benefit from high clock speeds, this feature needs to be disabled to.

After i was happy with CPU overclocking i went on with the GPU.

For some reason i didnt use the new 500w generic PSU that came with the case, and used my old trusty 400w.

I was very naive and ran the OCCT PSU test after some ocing to gpu. the PSU got very hot took its last gulp of electricity and went off with a bang and short circuit my room.

That made me worry abit. so i looked in the GTX465 manual and one of the first things that is written there are that it "recommands" 550w psu under the minimum requirements.

quite odd to "recommand" something under minimum requirements. but still after little research i saw that this type of cards really do need more power.

so i didnt wanna relay on the 5$ worth generic 500w psu even tho it ran the system without going too hot, and bought a CM GX 550w before proceeding with gpu overclock.

The first thing i noticed when OCing the gtx465 is the huge increase in performance, i didnt record my benchmarking results, but you can find other people that did them online and it shows more or less same results i got.

Only thing diffrent is that i needed to increase the voltage to keep the system stable enogh to run games over many hours.

I can do a very high overclock w/o increasing the voltage like many reviews showed, but things wont be stable over long time. and even a short(15-25 mins) under OCCT gpu test.

I experianced usualy core/mem clock drops when voltage was too low. sometimes the core would drop to its original value(607) and i could change it back up but most of the time it would drop to its safely settings that is ~400, making things run very slow.

When that happens I had to either restart pc or disable/enable the gpu from device manager to get it working in normal clocks agian.

ATM my overclock on my gtx465 is : 1.025v(1025mV)(default is 975mV) 743MHz core 1486MHz shader 1709(855)MHz memory. on OCCT gpu test i get maxed at 78-79c. games max at 70c or so. idle on about 42-45c.

Note that this is with my insane ambient temps of 31c-36c. When AC is working temps drops alot like with the cpu.

Im wondering why is my default voltage on gpu is that low, does anyone else have a gtx 465 and can share what is his default voltage would be helpful

also i run at lower cpu core voltage than other people seem to report.

תגובות שאלות והמלצות יתכבלו בברכה

neu

תריץ באנצים לפני\אחרי.. ;D

tl;dr

יהיה יותר נחמר לראות קצת באנצ'ים בשטח של לפני ואחרי באמת