Personal computing discussed
Moderators: renee, Flying Fox, Thresher
ultima_trev wrote:I recently got a 32GB DDR4-3200 kit to replace a 16GB DDR4-2400 kit. However the system won't boot if XMP is enabled, I have to revert to the motherboard (GA-Z170-HD3 revision 1) default of 2133. Is there specific timings I should use in manual mode so that it will work? If 3200 for the motherboard is a stretch, is there a way to operate it at 3000, 2800 or 2666?
ultima_trev wrote:I just hope I don't become too system limited in MMO or RTSs when I get my GTX 1080 from Newegg tomorrow.
Krogoth wrote:The motherboard and memory controller are possible limitations.
Honestly, you shouldn't worry too much about it. Memory bandwidth and latency are moot points for the most part for majority of mainstream workloads. If you want to squeeze a little more performance out of your CPU/memory. You should try to run the memory at 2133/2400Mhz with more aggressive timings.
ultima_trev wrote:To answer JBI's question, it's a 2x 16 kit. It's also not a "need" more so just "want," same for the HDR 4K TV and GTX 1080.
Airmantharp wrote:I did manage to get some Corsair DDR4-3000 running at ~3000 on a Z170-AR with a 6700K, but I couldn't tell you how I did it.
Does really seem like it's luck of the draw.
ultima_trev wrote:It is single sided for the old RAM versus dual sided for the new.
just brew it! wrote:ultima_trev wrote:It is single sided for the old RAM versus dual sided for the new.
That is almost certainly the key issue. The additional load on the memory bus, combined with the fact that the memory controller is being pushed way beyond spec, are probably conspiring to put 3200 out of reach.
maxxcool wrote:just brew it! wrote:ultima_trev wrote:It is single sided for the old RAM versus dual sided for the new.
That is almost certainly the key issue. The additional load on the memory bus, combined with the fact that the memory controller is being pushed way beyond spec, are probably conspiring to put 3200 out of reach.
Indeed. This could be tested. Run with only 1 stick for a bit.
Ryu Connor wrote:XMP memory isn't marketed very honestly. The rating on the package isn't a lie. It was certainly validated at the advertised speed. The problem is the manufacturer can't validate your memory controller.
So you buy some XMP, get excited about some stupendous speeds, and then discover that it's not going to work. Sometimes hardcore tweaking can get it to work and sometimes you find it's just an insurmountable wall.
I'm honestly surprised some vendor hasn't got sued over XMP yet.
Vhalidictes wrote:
I have never owned a single stick of RAM that didn't have an XMP profile. I have never owned a single stick of RAM that ran properly when using the profile. XMP is a total waste of time (and had nothing to do with my memory purchase choices after the first few). Get slow memory with really low CAS timing instead - almost the same performance for a lot less money.
RAM speeds might finally be starting to matter again with DDR4, but we're discussing about a 10% performance delta (+5 to -5) in any case.
synthtel2 wrote:I've always bought G.Skill or Crucial at well above JEDEC specs and XMP defaults have always worked flawlessly, for another anecdata point.
thecoldanddarkone wrote:Thread derailment - As for 2400@10 is that at 1t?
thecoldanddarkone wrote:Usually I can get close, but ultimately I normally have to fiddle with something. I only really buy from Gskill or Crucial. Thread derailment - As for 2400@10 is that at 1t?