EVGA E760 bclk wall??

I'm having trouble with this particular sample/motherboard being able to run high bclk with the x18 qpi ratio? I can run up to 208 bclk with the qpi controller set to enabled/auto (x18 ratio) but at 209 and 210+ I begin to run into no (failed) boot scenario. If I disable the qpi control in BIOS the board drops to x12 qpi ratio and I can boot at 19x220. I've been trying different amounts of voltages as well as single/dual/triple channel but I haven't been able to pinpoint the cause of the wall with the board running high bclk at x18 or higher qpi ratios.

19x220 (BIOS):

I've been looking closer at the qpi ratios for the board and it appears that I have four different ratios.

QPI controller: disabled = x12
QPI controller: enabled...
Auto = one of three choices below
or manually select...
4.800 GT/s = x18
5.866 GT/s = x22
6.400 GT/s = x24

the only time i have been able to break 220 was to up PCIe freq. 105(+) would get me over 220, but anything over 101 would break the onboard lan. so i was forced to sit right around 218~219 cause i needed onboard lan.

Should I expect to be able to run an X58 chipset motherboard at 215/216 bclk with a qpi ratio of 4.800 GT/s (x18) or higher? This board when set to auto seems to default to the x18 ratio at both 180 and 200 bclk but while running at stock 133 bclk it defaults to the 6.400 GT/s (x24) ratio.

PolRoger said:

Should I expect to be able to run an X58 chipset motherboard at 215/216 bclk with a qpi ratio of 4.800 GT/s (x18) or higher? This board when set to auto seems to default to the x18 ratio at both 180 and 200 bclk but while running at stock 133 bclk it defaults to the 6.400 GT/s (x24) ratio.

Click to expand...

Yes, you should be able to run that. Especially on the Classified.

I think this board/sample has QPI controller problem. I can run x18 ratio up to ~208 bclk but I cant even boot with the other two (x22,x24) at even 19x180!

What voltages are you increasing? Leaving it on auto, you should see 220 at least, if your chip can dig it that is

My current E760 also has a bad wall around 215MHz
Been thinking of RMAing it again, but it's such a pain...
I've always used the x18 multi....I'll have to play with this next time I've got it out

nzaneb said:

What voltages are you increasing? Leaving it on auto, you should see 220 at least, if your chip can dig it that is

Click to expand...

Even using the x19 cpu multi and voltages as high as ~1.325v vcore; 1.35v vtt; 1.30v IOH; and 1.60 to 1.65v dram... once I move past 209/210 bclk the x18 qpi ratio fails and I have to disable the controller which drops the ratio down to x12. Using the x12 ratio I've tested as high as 220 bclk.

MIAHALLEN said:

My current E760 also has a bad wall around 215MHz
Been thinking of RMAing it again, but it's such a pain...
I've always used the x18 multi....I'll have to play with this next time I've got it out

Click to expand...

Leaving voltages on auto and manually selecting the x24 qpi ratio I can boot at 20x156 bclk (3.12GHz). If I use the E-Leet software and slide bclk to 157 the board locks up in windows.
Leaving voltages on auto and manually selecting the x22 qpi ratio I can boot at 20x169 bclk (3.38GHz). If I use the E-Leet softwate and slide bclk to 170 the board locks up in windows.