So I updated my BIOS to v2002 for my Crosshair IV a few weeks ago, and it thought it would be a great chance to mess with some overclocking again. The last time I updated the BIOS was when I first got the board (v1005).
Anyways, I decided to do some overclocking with my chip by only upping the multiplier, and I can't get it to run stable.
The problem is, the whole computer would lock-up / freeze after ~3 minutes into Prime95 Blend Test. I don't get any BSOD's and Prime95 doesn't stop itself - the system just freezes and only a reboot works. I can..surf the web, go onto the forums here, watch a 30 minute YouTube video and it would be okay.
I'll follow prodecures as always...
Phenom II X6 1090T attempt at 4GHz (200MHz default bus X 20)
ASUS Crosshair IV Formula 890FX Mobo with BIOS 2002
8GB (4GB X 2) GSkill RipJaws DDR3 1600MHz RAM at default (I've tried both 1333MHz and 1600MHz)
Thermaltake Frio CPU Cooler with push-pull fan config
Single XFX 5850 1GB GDDR5 (my 2nd card was getting in the way of the mobo buttons)
Corsair TX 850 PSU
120GB Corsair Force GT SATA3 SSD (I'm using JUST the SSD; fresh install of W7 Ult x64 with nothing on it but P95 and monitoring tools like CPU-Z, HWMonitor)
Using the latestest chipset / LAN / USB drivers
CCC version 12.8
I've tried these settings in BIOS:
DRAM 1600MHz or 1333MHz
CPU/NB 2800MHz or 3000MHz
HT 2000MHz or 2200MHz
CPU Voltage from 1.38v to 1.48v
CPU/NB from 1.25v to 1.30v
HT from 1.25v to 1.2875v
NB: from 1.20v to 1.2875v
SB from 1.20v to 1.2875v
VDDR from 1.245v to 1.272v
I left CPU VDDA at the stock 2.5v
Left NB 1.8 at...1.8v
Had CPU LLC, NB LLC, VDDR (?) LLC on Auto, 50% and 100%
Left PCIE frequency and voltage and such on auto (100MHz, Auto, etc)
When Prime95 is running the Vcore will jump up to 1.52v (as seen on CPU-Z, HWMonitor and AIDA64).
The highest I've seen the CPU temp go up to is ~54*C while running Prime95.
Keep in mind, I didn't jump straight to 4.0GHz; I had it at 3.6GHz and 3.8GHz (of course at lower voltages) and it had no trouble running Prime95 and 3DMark11.
I'm unsure to push the NB, SB, HT, CPU/NB higher...close to 1.3v seems a bit high. Also, ~1.52v on the Vcore for 4GHz??
When I reached 4GHz by only adjusting the Bus (sig), it used a bit lower voltages...(CPU/NB 1.28V, HT 1.28v, NB 1.237v, SB 1.23v, VDDR 1.25v, Vcore ~1.45v)
FX-8350 @ 4.8GHz // ASUS Crosshair V Formula 990FX // Sapphire Vapor-X HD 7970 + Dual-X HD 7970 // Thermaltake Frio w/ push-pull (using Antec Formula 7 Nano-Diamond + Cooler Master JetFlo fans) // 8GB (2 X 4GB) G.Skill RipJawsX 2133MHz // Corsair TX850 850W // Corsair Force GT 120GB SSD (OS) // Kingston V200+ 120GB SSD // WD Caviar Black 1TB // Windows 7 Ult x64
09:49 PM by