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Questions about DDR DPC and ranks, speed & CAS Latency for PC upgrade
Sorry for the long post. Lots of questions
I'm getting closer to upgrading my X299 system. Or is that downgrading? I've always needed more PCIe lanes than mainstream motherboards/CPU's have offered, but it seems I'm just going to have to make some sacrifices.
I'm either going to get a Z790 motherboard that has at an x4 PCIe slot off the chipset to I can add extra USB 3.0 ports if the board has 10G LAN (Eg ASUS Proart), or add a 10G NIC if it has 2xUSB 3.0 headers. My whole home is 10G wired.
Gigabyte is out, as you can only get 5.1 audio by running cables to the front of your PC.
Other boards say the only way to get "spatial" audio is to use the front ports. I don't like the idea of having to run extension cables to the front of my PC for audio. btw: I never use headphones, a microphone or a webcam. I'm not sure if spatial audio is even an issue?
I'm struggling with the whole DDR5 scenario.
The ASUS Z790 Apex only has two memory slots. If I fill that I have 1DPC, right?
On boards with 4 slots, I plan on only using 2 slots as the deficit for 4 sticks from reviews I read seems to be about 9%-10%,
So 2 sticks on a 4 slot motherboard is 1DPC?
So it seems I'm looking for Single sided sticks. That is 1R. So A single sided kit of two sticks is 1DPC 1R. Is my understanding correct?
Finding 32GB 1R kits locally has been all but impossible so far. I may have to settle for a 24GB 1R kit
I've been saving for some time. My primary criteria is "Best possible performance". Price is only a factor because here in Australia there is a very limited selection and prices can be as high as 3 times the USD price.
With timings, they are all over the place. Am I better off buying memory with the CL less than or equal to half the memory frequency (I read somewhere it is relevant. Eg a 6000mhz kit would not have a CL higher than 30). Should I look for memory where all of the timings are as close as possible to each other? Or is CL still the most relevant factor?
It seems PCIe x5 is all hype at the moment. I guess better options will arrive over time. You either have a SSD running PCIe x5 and lose 50% of your GPU bandwidth or run your GPU at 100% bandwidth and lose your PCIe x5 SSD. I've yet to find a motherboard that lets me have my cake and eat it too :)
So if my GPU is PCIe x4 and I lose 50% of its bandwidth (coz it's now running at x8 with a SSD), that means it's effectively running at PCIe x3 at 100%? For video editing, rendering, game design, and gaming will this be an issue, say withing the next 2-3 years?
I'm looking at boards like;
ASUS Z790 Proart
ASUS Z790 ROG Maximus Apex
ASUS Z790 ROG Maximus Hero
MSI MEG Z790 Ace.
I will run at least 4 PCIe x4 SSDs (probably Kingston KC3000D 2tb), preferably with 64GB DDR5. 10G LAN wired. No wireless. a 10TB Spinner and an RTX 3080 Ti GPU. 2x 32" 4K HDR monitors and a 1200W PSU with a 360mm cooler running push-pull. The CPU will be a 13700K (No point spending an extra A$200+ for a 2% performance uplift, especially with power consumption and heat). I will be adjusting the Long duration and short duration power limits, or setting negative offsets to try to alleviate throttling, though this seems to mostly occur in synthetic workloads rather than real world, but in summer here the ambient temps can be as high at 40 Celsius.