Quote Originally Posted by mrcape View Post
Hi, great mem, what vdimm, vtt, nb, sb voltages did you use for these tests?
Hi mrcape

some more details in my earlier post on this kit:

http://www.xtremesystems.org/FORUMS/...postcount=1704


so far the CS3222271 is OK for 32M at 950mhz/CL7 at ~ 1.96V, but I have to keep vDIMM as low as possible to avoid stability getting worse as vDIMM increases.

i found that any setting over 1.90V causes errors (in memtest86+/HCI). This (still) applies at all the clocks I've tested, so Memtest stable clocking is limited by vDIMM for now.


over 2.0V .......not so useful





Quote Originally Posted by mrcape View Post
what vdimm, vtt, nb, sb voltages did you use for these tests?
voltages were just set roughly for the 475x9 Everest screens, but for 32M and IBT runs in the earlier post (linked above), here's what I used:

i'm just moving CPUPLL (with SB) around relative to vCore, and also to keep PLL above (or below) the vNB in use (including reported vNB droop).


475x9.5/1:2 (4512mhz) (32M)

vCore 1.3750 LLC on - higher than needed for 32M but already Prime/IBT tested.
vTT 1.39V - as tested with above vCore
GTLs +40, AUTO, AUTO, AUTO, NB AUTO - as tested with above vCore.

the rest roughly set for 32M pass, as DIMMs fail 86+/HCI at this CL7 memory clock.

vPLL 1.55V
vNB 1.51V
vDIMM 1.96V
SB1.5 1.55V


562x8/5:8 (4495mhz) (32M)

vCore 1.3750 LLC on
vTT 1.39V
vPLL 1.60V
vNB 1.59V
vDIMM 1.90V
SB1.5 1.60V

GTLs as above, but not tested further with these settings.


562x7/5:8 (3933mhz) (IBT x 10)

vCore 1.25V LLC off
vTT 1.26V
vPLL 1.51V
vNB 1.59V
vDIMM 1.90V
SB1.5 1.51V

GTLs as above, but not tested further with these settings.