It's been years but I think 9-9-9-27.
Not at stock I won't. I also ran this board at 191 MHz BCLK for years with pretty low voltages.
3.
-
Competitor rules
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
1366 X58 Xeon 5650
- Thread starter Flashheart
- Start date
Try the looser RAM timings at stock speed, different chip, different memory controller. I was never able to run some corsair cl8 ram at cl8, even at 1333 with it being stable.
At least you will know if everything is working while gaming at stock settings then.
At least you will know if everything is working while gaming at stock settings then.
Nope, might give that a go.
After loading BIOS defaults and setting a few basic things (DRAM to 1333 MHz, HDD to AHCI, etc.), I played 1.5 hours tonight without any problems. Before the most I got was maybe 20-25 minutes, so it looks to be an overclocking issue.
Is it possible to set voltages too high? VCore at stock is currently 1.2 V but varying a lot. Not sure where to begin now I'm starting from scratch. Might try 190x20 with Turbo off at 1.3 V or something?
Last edited:
Baby steps, learn the ins and outs of your processor. Start with 1.2v and see how high you can go. Then 1.225v then 1.25v etc. Until you reach a speed, temp and voltage you are happy with. While you are doing this keep ram as it is now with QPI volts as it is now. Keep a log of settings with results and you will quickly start to notice when the chip needs a lot of volts to stay stable. You want to be just under that.
Later once you are happy with the CPU and are sure that it is stable then you start looking at ram.
Too high voltage is the fastest way to kill your CPU. Core 1.35-1.4v MAX although I would stay under 1.35v and QPI as mentioned many times under 1.35V but definitely as low as will be stable. Mine only required QPI at 1.22v to be stable.
Last edited:
I can't just up the BCLK whilst keeping the VTT voltage the same though, both that and VCore need to be adjusted. Also I know the maximum is 1.35 V but what I meant was that can the voltage being too high within the safe range affect stability? e.g. 1.25 V is stable but 1.3 V is not? I'm going to try enabling Load Line Calibration...I think that was on Auto before, which might've meant "off".
Testing stability with IBT is pretty fast so that's fine but as I have seen, it is not indicative of overall stability in my case. I need a better way to test stability.
Testing stability with IBT is pretty fast so that's fine but as I have seen, it is not indicative of overall stability in my case. I need a better way to test stability.
In my experience, no, increasing voltage in itself does not negatively impact stability (while keeping within normal limits), however, the associated increase in temperature does negatively impact stability. If you have good temperature control, then 1.3v should not be problematic.
Last edited:
On my R3E I found the best result is LLC at 100%. Vdroop is too problematic with LLC at off or 50%, which causes a crash under high load.
As Stu mentions...my experience is similar. Slightly higher vcore should not negatively impact an overclock. My old i7 950 was running at 1.4v (pre overclocked system) and it was perfectly stable. Yet after fiddling some I could get it down to 1.34v.
As Stu mentions...my experience is similar. Slightly higher vcore should not negatively impact an overclock. My old i7 950 was running at 1.4v (pre overclocked system) and it was perfectly stable. Yet after fiddling some I could get it down to 1.34v.
Made these changes from stock and had a crash after an hour or so:
- Multiplier = 20x
- BCLK = 180 MHz
- DRAM = 1440 MHz
- VCore = 1.25 V
- LLC = Enabled
Everything else still at auto/default.
EDIT: Also crashes when BCLK = 160 MHz.
- Multiplier = 20x
- BCLK = 180 MHz
- DRAM = 1440 MHz
- VCore = 1.25 V
- LLC = Enabled
Everything else still at auto/default.
EDIT: Also crashes when BCLK = 160 MHz.
Last edited:
I'm not sure what multipliers you have available on the ram but keep it at the lowest while you are trying to establish a satisfactory CPU overclock. It is possible that you might have to touch QPI voltage a bit.
Also keep in mind that the CPU will work harder once you have the CPU speed you are happy with, and you start increasing memory speed. This is because the CPU will have access to faster memory. Tests like IBT will report higher GFLOPS, and the CPU will produce more heat as it is able to work more with less delays.
Happy hunting
Also keep in mind that the CPU will work harder once you have the CPU speed you are happy with, and you start increasing memory speed. This is because the CPU will have access to faster memory. Tests like IBT will report higher GFLOPS, and the CPU will produce more heat as it is able to work more with less delays.
Happy hunting
Last edited:
Finally had some time to use my desktop tonight. Tried the following, so far no crashes:
VCore = 1.25 V
VTT = 1.25 V
PLL = 1.84 V
BCLK = 160 MHz
Multiplier = 20
DRAM Voltage = 1.66 V
LLC = Enabled
Maybe a higher PLL voltage was needed for this CPU...I'll keep playing and find out.
VCore = 1.25 V
VTT = 1.25 V
PLL = 1.84 V
BCLK = 160 MHz
Multiplier = 20
DRAM Voltage = 1.66 V
LLC = Enabled
Maybe a higher PLL voltage was needed for this CPU...I'll keep playing and find out.
TBF you BCLK is very low. i have had 5 of the x5650's and all did a stable 191 minimum.
if i was you i would start over i feel you may have made a mistake somewhere giving you a fouls OC fail.
Put all setting to auto or ever better reset bios.
Vcore - 1.35v
LLC - Enabled
turbo - Enabled
Multiplier - 22 (use the turbo multi)
BCLK - 200
Uncore - under 3000Mhz
Ram - Under 1600Mhz
All over setting to AUTO and i mean all
Do NOT stress test with prime95. Use SuperPI, LinX, 3Dmark, cinebench and so on but not prime its a silly test the puts levels of stress on your system that are not realistic and dosent really test anything, i had an i5 8hr stable with prime then BSOD on opening firefox.
start with 200 BCLK and work down in 10's until stable then start dropping your Vcore to fine lowest stable and your good.
I have already "started again", that's why I'm at 160 MHz. I was happily passing stress tests at 200 MHz but getting this weird crash in games, as I said earlier. The point is that I was crashing before even at 160 MHz and it looks like it's OK now, with the only difference I'm aware of being the PLL voltage.
Also remember that 200 MHz with turbo on, this CPU is going to reach 4.6 GHz sometimes. 4-4.2 GHz should be a gimme but 4.6 GHz is not gonna happen on every chip.
I picked up another HP workstation, Z800 this time, I'll end up with a spare X5687, is there a suitable recommended cheap used MoBo I could pick up for it?... Even better if it could use ECC ram as the HP's do.........