--- product_id: 122390375 title: "I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard" brand: "syba" price: "51.16 DT" currency: TND in_stock: false reviews_count: 11 url: https://www.desertcart.tn/products/122390375-i-o-crest-si-pex40129-dual-m-2-nvme-ports store_origin: TN region: Tunisia --- # PCIe 3.0 x16 bandwidth Dual M.2 NVMe ports Up to 6500 MB/s transfer speed I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard **Brand:** syba **Price:** 51.16 DT **Availability:** ❌ Out of Stock ## Summary > 🚀 Unlock next-level storage speed and capacity—because your workstation deserves the best! ## Quick Answers - **What is this?** I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard by syba - **How much does it cost?** 51.16 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/122390375-i-o-crest-si-pex40129-dual-m-2-nvme-ports) ## Best For - syba enthusiasts ## Why This Product - Trusted syba brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **NVMe RAID Ready:** Supports motherboard chipset-based NVMe RAID for ultimate data performance and redundancy. - • **Dual M.2 NVMe Ports:** Expand your storage effortlessly with two dedicated NVMe slots. - • **Bypass Bifurcation Limits:** Works seamlessly on non-bifurcation motherboards—no CPU or chipset dependency. - • **Unmatched Transfer Speeds:** Experience transfer rates up to 20x faster than SATA SSDs, maxing at 6500 MB/s. - • **Maximized NVMe Performance:** Harness full PCIe 3.0 x16 bandwidth for blazing-fast SSD speeds. ## Overview The I/O CREST SI-PEX40129 is a high-performance PCIe 3.0 x16 riser card featuring dual M.2 NVMe ports powered by ASM2824 switches. It delivers dedicated PCIe 3.0 x4 lanes per SSD without relying on CPU or chipset bifurcation, enabling transfer speeds up to 6500 MB/s—20 times faster than SATA SSDs. Compatible with non-bifurcation motherboards and supporting NVMe RAID, it’s the ultimate upgrade for professionals demanding accelerated secondary storage. ## Description Make sure this fits by entering your model Number. As media's ASM2824 has a PCIe 3.0 x8 upstream port as well as 4 PCIe 3.0 x4 downstream ports. The switch is designed primarily for storage devices. SI-PEX40129 card uses ASM2824 switches and therefore does not rely on PCIe bifurcation supported by CPU or PCH (they will work on closed end systems that have limited PCIe bifurcation capabilities). dedicated PCIe 3.0 x16 bus bandwidth fully maximizes NVMe SSDs performance delivers unprecedented fast transfer speed via intelligently aggregated dual x16 PCIe 3.0 Bus bandwidth NVMe RAID is supported base on the motherboard chipsets the I/of crest SI-PEX40129 is a great accelerated secondary storage solution for any workstation with true PCIe 3.0 x8 bandwidth (x16 interface). It has two M.2 NVMe ports to accept two NVMe M.2 SSDs, so each NVMe M.2 SSD has dedicated PCIe 3.0 x4 bus bandwidth. It delivers transfer speeds 20 times faster than SATA SSDs. By by-passing the traditional PCIe 3.0 x4 NVMe solutions, Using the SI-PEX40129 will allow user add 2 m.2 NVMe into any non-bifurcation PCIe x16 slot to achieve their full potential with a bandwidth of up to 6, 500 MB/s. Unlike on-board DMI 3.0 based NVMe solutions or single NVMe PCI-E x4, which are forced to share a single PCIe 3.0 x4 lane with the motherboard's data ports, The SI-PEX40129 combines 2- m.2 drives to be able to run on PCIe 3.0 x16 lane. This unique architecture allows the drive to interface directly with the platform's CPU, which provides PCIe x4 bandwidth for each NVMe SSD!. Review: works on my macpro 5,1 - easy install and can now boot from NVMe on my MacPro 5,1. Review: It works well - I have 2 firecuda 2tb 520 SSDs connected to this and the speed is excellent. There was some high pitched whine from the fan but I just tighten the screws and it seemed to cure the problem a bit. It has a controller chip on it for bifurcation ideal for motherboard with only one slot that has it, that is usually the GPU slot. ## Features - As media's ASM2824 has a PCIe 3.0 x8 upstream port as well as 4 PCIe 3.0 x4 downstream ports. The switch is designed primarily for storage devices - SI-PEX40129 card uses ASM2824 switches and therefore does not rely on PCIe bifurcation supported by CPU or PCH (they will work on closed end systems that have limited PCIe bifurcation capabilities) - Dedicated PCIe 3.0 x16 bus bandwidth fully maximizes NVMe SSDs performance - Delivers unprecedented fast transfer speed via intelligently aggregated dual x16 PCIe 3.0 Bus bandwidth - Nvme RAID is supported base on the motherboard chipsets ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07HYZY7P2 | | Best Sellers Rank | 326,198 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 3,534 in Motherboards | | Box Contents | (1) Dual M.2 to BiFurcation PCIe x16 Adapter, (1) M.2 Mounting Screws, (1) Screw Driver | | Brand | Syba | | Brand Name | Syba | | Compatible Devices | Personal Computer | | Compatible devices | Personal Computer | | Customer Reviews | 4.0 out of 5 stars 104 Reviews | | Global Trade Identification Number | 00857426008017 | | Hardware Interface | PCI, PCIE x 4 | | Hardware interface | PCI, PCIE x 4 | | Item Type Name | Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard | | Item Weight | 0.9 Pounds | | Item weight | 0.9 Pounds | | Manufacturer | SYBA Multimedia, Inc. | | Manufacturer Part Number | SI-PEX40129 | | Model Number | SI-PEX40129 | | Operating System | Windows, Linux | | Product Warranty | 3 Year Warranty | | Style | Traditional | | Style Name | Traditional | | UPC | 857426008017 | ## Product Details - **Brand:** Syba - **Hardware interface:** PCI, PCIE x 4 - **Style:** Traditional - **Item weight:** 408 g - **Compatible devices:** Personal Computer ## Images ![I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard - Image 1](https://m.media-amazon.com/images/I/51o+hCYOGAL.jpg) ![I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard - Image 2](https://m.media-amazon.com/images/I/51P8E72zrCL.jpg) ![I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard - Image 3](https://m.media-amazon.com/images/I/41W6L11h-ML.jpg) ![I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard - Image 4](https://m.media-amazon.com/images/I/5193AsbrCpL.jpg) ![I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard - Image 5](https://m.media-amazon.com/images/I/41ZT7ahwI5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ works on my macpro 5,1 *by R***K on 1 September 2024* easy install and can now boot from NVMe on my MacPro 5,1. ### ⭐⭐⭐⭐⭐ It works well *by N***Y on 24 April 2022* I have 2 firecuda 2tb 520 SSDs connected to this and the speed is excellent. There was some high pitched whine from the fan but I just tighten the screws and it seemed to cure the problem a bit. It has a controller chip on it for bifurcation ideal for motherboard with only one slot that has it, that is usually the GPU slot. ### ⭐ Unstable *by A***R on 9 September 2022* I own several similar cards by StarTech which are far more stable and give better performance over My recent gift by iocrest, at first glance the iocrest looks great but that's smoke and mirrors as when close inspected you will see poor finish and fit, bad soldering and poor parts especially the nvme mounting and PCIe cinnector. It installed OK but I have trouble with my computer always seeing the 2 drives installed. Often I simple just loose the drives especially when transferring data. It constantly connects and disconnected during data access.. It's become impossible to use. I have checked everything from bios settings to drivers and pc settings yet find zero faults or conflicts... As such I have replaced it with another StarTech without issue... Yes the StarTech looks basic but it works great and reliable to 100%... The only plus for the iocrest is the fact it looks good... With the StarTech I fitted 2 aftermarket cooling and it was great. The fact is my StarTech version is reliable and cheaper by 50 pounds so it's a no brainer... I did return my iocrest and I have no regrets... As such I do not reconmend the iocrest... Avoid as its far too unstable.. PS I tested this on Windows 7,8,and 10 and funny enough the very old win 7 worked the most stable performance with some tweaking and persistence BUT Windows 10 21h2 was the most unstable which is very disappointing, I did also test on a beta win 11 and had nothing but trouble.... It is not possible that the card is faulty as it worked flawlessly on windows 7 my old test rig dating back a good 10 years. ## Frequently Bought Together - I/O CREST SI-PEX40129 Dual M.2 NVMe Ports to PCIe 3.0 x16 Bifurcation Riser Controller - Support Non-Bifurcation Motherboard - GLOTRENDS PA09-HS M.2 NVMe to PCIe 4.0 X4 Adapter with M.2 Heatsink for 2280/2260/2242/2230 M.2 NVMe SSD - GLOTRENDS PA21 Dual M.2 NVMe to PCIe 4.0 X8 Adapter Without PCIe Bifurcation Function, Support 22110/2280/2260/2242/2230 Size (PCIe Bifurcation Motherboard is Required) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/122390375-i-o-crest-si-pex40129-dual-m-2-nvme-ports](https://www.desertcart.tn/products/122390375-i-o-crest-si-pex40129-dual-m-2-nvme-ports) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-23*