ram overclocked, 3dmarks go down

[th3dumbguy]

ok i over clocked my ram to 235mhz @ 2.9volts but when i try to bench it with 3dmark05, it doesnt even work. it loads EXTREMELY slow and once it loads, the whole comp crashes and retarts.

the max clock speed that i could bench at was 215mhz but even at that speed, the fps was lower and my results were lower as what it was at stock speeds. anyone know what the hell is going on?

using this: http://www.pqimemory.com/spec.asp?link=/dc/PQI3200-1024DAH.htm
a64 3000+ winnie
dfi lanparty ultra-d

 

[Mrvile]

Wanna give us more details? Like what your FSB, HTT, other OCing information is.

 

[IntegraGSR]

i would use memtest for ram stability testing, not 3dmark..

when you're finding your max oc for your ram, you should set everything else at stock speeds (CPU, video card) so you know if you have stability problems, its due to your ram and not something else.

 

[Gogar]

I bet he forgot to lower his hypertransport multiplier (?)

 

[th3dumbguy]

ok all of the above was been done at 7x multiplier. only fsb/htt was changed. i had not messed with any of the memory timings (all set on auto) or the memory dividers. I know that i should use memtest to test ram and it did pass one pass ofmemtest but my theory was the problems i had in 3dmark05 would forshadow problems to come when i game?

integraGSR, i will bring my video card speeds back to stock and will test it tomorrow with multi at 7 with only ram being OC'ed

i also went another route, OCing the ram as least as possible by adjusting the divders. My cpu (3000+ winnie) was able to top out at 275HTT @ 1.664v. Memory divider was set at 3:4 so the ram was OC'ed to only about 206mhz. all benchmarks have gone through without a hitch so far and im gonna leave prime95 on overnight to test stability.

so still, anyone know what im doing wrong with my ram?

 

[IntegraGSR]

Originally posted by: Gogar
I bet he forgot to lower his hypertransport multiplier (?)

^^
did you lower the LDT multiplier?

 

[th3dumbguy]

uh.. .i see an LDT/FSB ratio which is at 4x and a LDT Bus Transfer width which is at 16 16. so how lower do this have to be?

ok i just found out that my ht had to be lower than 1000 and 4 x 235 was lower than 1000.

 

[Gogar]

Hmm what are your multiplier and memory divider? sometimes raising your multiplier will actually lower your memory speeds. And also some programs that report memory speed are wrong.

here's how you calculate it: ("divider" being the number like 200, 166, 150, 133 etc)

memclock = multi * htt / ceil( multi * 200 / divider )

Or you can look at my table:
http://math.gogar.com/athlon64.cgi?showtable=1

 

[Necrolezbeast]

lower the LDT/FSB to 3x