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.
Generally lower voltages means lower temperatures, lower power usage, and longer chip life span. Depends how important those things are to you. Normally auto voltages will be rather high compared to what's needed. Personally I stick with 1.3 V - it might be able to run at say 1.275 V but I can't be bothered to do more stress testing.Is there any reason why I should remove auto from the core voltage? minimum voltage was 1.336V so there's not a lot of fluctuation and I'm happy with anything below 1.35V. Temps are also good.
Pretty good chip!
Right, so today I got delivery of my x5650. I put the bios to default and uninstalled my 920. Installed the x5650, cleaned the heatsink, applied mx4 and position everything. It boots!
I think, great! But as I'm trying to run Time Spy to checkout some preliminary temps, core voltage, etc, Windows crashes. Reboot and at that point I notice RAM in bios is only 4GB.
After much trial and error it seems that any stick I install in Channel 2, does not get picked up by the motherboard. So I now have installed the sticks in Dual Channel mode to be able to utilize 6GB.
I have now managed to clock it to 4.2Ghz, with 210 BLCK (anything higher would not boot) and 20x multiplier. I've left the voltage to auto, and on a 26 minute stress test maximum core voltage is 1.344V which I'm happy with.
Maximum temperature was 69 degrees, although Core 1 was 80 degrees.
Is there any reason why I should remove auto from the core voltage? minimum voltage was 1.336V so there's not a lot of fluctuation and I'm happy with anything below 1.35V. Temps are also good.
Pretty good chip!
having dropped back to 4.0 im pulling a max of 1.328 in hwmonitor and set to 1.35 in bios ^^
get that i7 up on the bay and get £25 back from it what cooler you running? also get some passmark scores/benchmarks up etc always nice to compare.
Generally lower voltages means lower temperatures, lower power usage, and longer chip life span. Depends how important those things are to you. Normally auto voltages will be rather high compared to what's needed. Personally I stick with 1.3 V - it might be able to run at say 1.275 V but I can't be bothered to do more stress testing.
I found it was not just a matter of cranking the VCore up past 4GHz. Although 1.4V is fine for 24/7 use.
I don't know how similar our two BIOS's are but I posted all my setting in this thread.
https://forums.overclockers.co.uk/showthread.php?t=18762686
thanks for that, I'll check the settings when I get home.
It just might have been my RAM not liking 200Mhz, which is why I've reduced the ratio for now. I might even have to go down to 185Mhz BLCK (that's what my 920 was running at for the past 6 years).
What was odd was I managed to be stable with auto voltage which was around 1.35V, but manually setting there, it wasn't happy.
It was late at night so gave up, will have another look when I get home.
account for vdroop? if hwmonitor or whatever is saying youre using 1.35v under load then set it a bit higher in the bios, im at 1.35v in bios and using 1.328v under load according to hwmonitor
My ram refuses to go over 1600mhz so when i overclock my CPU i have to make sure my ram is either 1600mhz or lower otherwise it will refuse to boot
In my own testing, the Xeons cannot overclock the ram without increasing BCLK, this is different from the i7 which allow ram overclocking without bumping BCLK. You must run with your ram at 1333 at stock clocks otherwise no POST.
Also, overclocking memory results in higher temps on the CPU which may limit your CPU overclock. I wouldn't recommend going far beyond 1600mhz, even just a small increase of 150mhz over this bumped my temps by up to 9C. YMMV.