A long time ago when I was but a pleb learning the ways of building pcs… after I built my frist PC, I had a 8GB kit of Patriot Viper ram DDR3 running at 2133 mhz at a timing of 11-11-11-30. In short I wanted to upgrade and since I didn’t know much about ram timing (at the time), I told the guy “here’s the specs of my current ram can you find something like it”, he said sure and handed me a kit of DDR3 Corsair Vengeance ram.
was cleaning my pc and I looked at the ram but I noticed that the corsair ram was different to my Patriot ram, it ran at a timing of 9-9-9-24 and its max was 1600 mhz.
Im just wondering if missmatching this ram with my other ram would cause any issues like slower speeds or something else that could hinder performance, and if there is a way to make them work better if there are any issues. Thanks
Boot with those 2133 sticks, copy settings somewhere, it may even work if you just save that as OC profile, then set that worse one in and load that profile / manually punch in same settings, and it’ll work or doesnt work
I think you are atm running like 4x 1600mhz 9-9-9-24
I took the corsair ram out now and on both speccy and Corsair Link it says the ram is running at 1066 mhz and the clock is one tick higher than what its supposed to be… interesting… considering I swear I manually set it to be 2133 mhz in the bios.
well it seems turning on XMP tuned my ram back up to 2066 for each stick, ill take them out and see what happens with my corsair ram with xmp, is xmp for all ram types or some?
Edit: just noticed the timing is now 11-11-11-30 (what its properly rated for) instead of the previous 12-12-12-30 with the custom frequency setting in bios
well seems everything is working at a max of 800mhz per stick, is there any way to make the patriot ram specifically go faster or would that cause problems?
You can manually try to make them go faster than patriot’s xmp, it just requires a bit more effort than overclocking cpu or gpu
When it fails to load whatever you set them to, it’ll reset those sticks to lowest speed, or PC wont boot and then you just need to press that bios reset button
I am unfamiliar with the program you are using, but I am nearly certain that the DRAM frequency listed is 1/2 of the effective rate. In other words, when it says 1066.5 MHZ in the first pic, it is really running at 2133 MHZ, and when it says 799.9 MHZ it it really running at 1599.8 MHZ. In other words, you are over-thinking it and everything was fine. The numbers in the second pics on auto settings is consistent with typical DDR3 1600 MHZ @ 9,9,9,24 1T. The numbers from the first pic are looser running a 2T command rate, consistent with running DDR3 2133 MHZ RAM.
You can check this by running a memory bandwidth benchmark. The way they advertise RAM by MHZ is nonsense in my opinion.
DDR3 1600 (PC3 12800) <- the 12800 number is the maximum theoretical bandwidth.
DDR3 2133 (PC3 17000) <-the 17000 number is the maximum theoretical bandwidth.
Assuming you have a CPU capable of making use of the bandwidth, you should get a benchmark number somewhere higher than 12800 and lower than 17000 if you put the settings back to where they were in the first pic. If it is half of that (i.e. less than 17000/2 or 8500) then maybe there is a real issue with the RAM settings.
I already knew that its the frequency per stick and it adds up to the speed that I wanted, before though the speed was at 666mhz so I was woundering why since I remembered my patriot ram was 2133 (and at the time I thought my corsair ram was as well so I was expecting 1066 mhz)
The 1066 MHz reported speed exactly matches the 2133 MT/s advertized speed of the faster RAM, so it’s working as it should be. (DDR means Double Data Rate, meaning data is transferred twice per clock.)
EDIT: And the second image’s 800 MHz corresponds 1600 MT/s - this is probably the JEDEC (non-XMP) profile of the kit.
