Originally posted by: tempoct
Thanks for the tip. Adding DDR voltage is so obvious but somehow I had missed it
I was experimenting with BIOS v3.13b, disabled the spread spectrum, DDR voltage @ 2.65v, the max I can get it to run Super PI 8M w/o any error is 2.36GHz.
On BIOS v3.20, the max I can boot into windows is 2.34GHz (and Prime95 failed around 5 mins). Anything higher will get BSOD while booting. It won't even post @ 2.4GHz. (I guess it's really need that +0.05v).
IMHO, I think my Venice wouldn't go higher... I got it as OEM version but I don't think that's the different. Maybe I've just got the one at the bottom of the pile.
Now I'm trying to improve perf by overclocking other things. Now I left the RAM frequency floating (running at CPU-LDT speed).
Originally posted by: RjG
To bump DDR voltage, go in the Cell menu | Voltage control | Adjust DDR Voltage
use the + and - keys to make it go up and down.
Bios 3.20 Vcore is not "adjustable" since the multiplier trick doesn't exist. If you really want extra Vcore juice just run RMClock and set up a single transition of full speed with 1.45 volts. Easy
PS, mine's a DH-E6 , easy 2500 on default voltage. Bump your DDR up and see how it does. Make SURE you turn all the "spread spectrum" junk off.
TEMPOCT, don't lose hope yet... seeing your CPU is OEM, maybe the heat sink could be remounted? Maybe a bit less goop would help, or a better heat sink? What's your temps at?
I played with my venice 3200 DH-E6 for a bit with the tool RENETHX posted last night. 2700 seemed no problem. 2800 primed for 15 min or so, then blue-screened. 280 was kinda overclocking the RAM a bit though (default volts and timings on the ram)
http://members.shaw.ca/randyg/MSI/venice2700mhz.PNG