Bifurcation3 in 1 with RTX 3090 or Titan 2, featuring x8 SSD power and performance.
Bifurcation3 in 1 with RTX 3090 or Titan 2, featuring x8 SSD power and performance.
The 3090 draws around 400W, not the 350W Nvidia claims. A PCIe slot supplies 75W, leaving 325W for two 8-pin cables rated at 300W each. Does the card just extract an additional 25W from one of them? That extra amount isn't that significant, but it could be a few watts more for just one pin.
Q2: You plan to split one PCIe x16 slot into two, using one for x8 speeds and the other for an x8 PCIe SSD (or x16, though it seems tailored for x8). The x16 slot for the 3090 and the x8 slot for an x8 SSD would likely slow things down compared to using a single x16. How does power management work here? With 50W at 12V and 25W at 3V & 5V, are both split equally or does the SSD draw the full 25W? It probably pulls that 3V & 5V 25W together and leaves 50W for the GPU. The GPU also needs that power for communication. Would it draw the missing 12V from the two 8-pin connections? The splitter itself consumes power, and the split might affect performance. If you connect one x16 to a single x16 splitter, can you still reach about 15GB/s? And could you run the x8 SSD in RAID 1 with another PCIe SSD on a different slot, even if they differ in speed or size? What impact would this have on real performance? Would Smart Access Memory still function without any compromises? I’m curious about the "400W TDP" Titan RTX 2...
Absolutely, those connectors can handle more than the 150W they're rated for. The splitters usually include power plugs, so you should also install them. Which SSD do you need? Most X8 SSDs reach up to about 25W, and you can achieve full performance if your system supports it. What motherboard and splitter are you working with?
I.... It seems you're not quite grasping what's being asked in Q2, right? That wouldn't make sense if I'm trying to understand your question. For Q1 you can strictly control power limits by not exceeding them, the cards are quite strict about drawing power, and usually they don't force the full 75 watts from the slot—power is generally balanced across the connectors. Although the official maximum is 150 watts per 8 pin, in practice they can deliver much more with thicker wires and good connectors. AIB cards (custom builds) come with specialized BIOSes that allow higher power limits, some reaching up to 400 watts, but you can usually reduce it by about 12.5% to bring it down to around 350 watts if needed.
I'm focusing on the PM1735 for an x8 slot and the 980 Pro for the remaining M.2 slot, though they're still uncertain. I've seen mentions of these options on certain retailer sites (https://peine-braun.net/shop/index.php?r...ry&path=59) and a specific product page (https://www.density.sk/product/pcie-bifu...ser-cable/). It seems the PCIe standard slots remain consistent, but some bifurcated risers are tailored for PCIe 2.0 or 3.0. I'm unsure if they can support 4.0 speeds or are limited to 2.0/3.0. I'm planning an ITX motherboard and need it to have x8x8 support in the BIOS/UEFI. The splitter should likely come from the same source as those mentioned (C_Payne), though I'm hesitant due to the "no warranty" warning. This is why I'm reaching out—my curiosity about power delivery logic and component distribution is growing. I appreciate any guidance you can provide, even if it's just a starting point. Thanks for your time, and sorry for the delayed reply after your quick replies.
It seems the setup is mostly fine, but it might be too complex for your needs. Gen 4 doesn’t require special PCIe cables, yet it operates at a higher frequency which could affect performance. You mentioned a specific CPU—most likely, I’ll choose a motherboard for you. What do you think?