well i just switched and swapped my dimm's around, even if they arnt in the corresponding dual channels i still get the same 8500mb/s result. something is stopping my ram from entering duel channel i think. or maybe it has something to do with that interleave thingy. either way im doing my head in.. here is my cpu ass-esmant
im asking xfx support using their live support, they take a while to reply tho, but are quick to ask twice if you are still there. phft
this was the convo i had with "PaulV"
PAULV
Hi. Welcome to XFX-Live. How can I help?
PAULV
May I help?
RICK
hi, i have the 790i ultra with 1800mhz ddr3 ram, can you tell me what interleave means? it shows it while the system is at post. also how do i get my ram in dual channel mode? they are in the corresponding dual channel slots.
PAULV
interleave is basically a feature of the RAM which allows for use of multiple threads, Providing that you have the RAM is the corresponding slots this should be operating in Dual Channel mode, this is an automatic feature
PAULV
more mainboards will show interleave in the post as it is used with later RAM types, but has been around for a while
RICK
so it does not state at post if dual channel is enabled? i have ran several benchmarks for ram bandwidth and it does not change when i have them in dual channel mode or in slots like 0 1 which is not dual channel?
PAULV
Are you using different RAM sizes, per module? cant see how this wouldnt be enabled aside if it is not Dual channel, but pretty sure the RAM is here,
PAULV
Also depends on the benchmark to be honest, the best benchmarks will only find a 5% difference between the two
PAULV
give or take I suppose but the difference between the two is minimal
RICK
no they are a matched pair of 2gbx2 ddr3 1800mhz 8/8/8/24 2T this is why i cannot figure out why the bandwidth will not increase from 8500mb/s when in either channel mode.
RICK
ok so in case it is not the benchmark tool, would there be a reason as to why it might not be activating dual channel?
PAULV
Im pretty sure it is here, as we have not come accross a case where it does not unless using awkward configs, ie different mem modules and sizes etc, but the config you currently have set up is fine as we have similar in effect ourselves, In testing however the difference between the two configs has been pretty minimal in all cases though
wth? dual channel shows minimal difference?