With the rapid improvement of the chip manufacturing process in the past two years, the performance of the original old servers has gradually fallen behind in all aspects. The AMD zen4 architecture CPU process has been upgraded to 5nm, the memory has been upgraded to DDR5 and the ECC error correction capability has been improved, and the graphics card’s 4nm 4090 has surpassed the A100 in terms of computing power alone, so I helped the laboratory install a zen4 7950x, DDR5 memory, pcie4.
configuration options
| name | Link | price | |
|---|---|---|---|
| motherboard | ASUS ROG x670E-E | Jingdong link | 6998 |
| CPU | AMD R9 7950x | ||
| Memory | Kingston DDR5 6000 frequency 64g memory set x2 | Jingdong link | 3598 |
| graphics card | MSI Super Dragon RTX 4090 24g (buy two) | Jingdong link | 31998 |
| SSD | Western Digital SN850x Black Disk 2TB | Jingdong link | 1498 |
| mechanical hard drive | Toshiba P300 3T mechanical hard drive (the 3T version is CMR vertical, with the longest read and write life) | Jingdong link | 499 |
| Chassis | Chaser PK620 Workstation Edition Glass Side Through | Jingdong link | 1579 |
| power supply | CORSAIR HX1500i | Jingdong link | 2799 |
| CPU cooler | Limin FC140 Twin Tower High Performance Standard Edition | Jingdong link | 321 |
| fan | Limin TL-C12C x3 three-pack set (buy two, and need three 14cm fans) | Jingdong link | 132 |
| price | 49422 |
CPU
motherboard
Memory
graphics card
Graphics card relative performance graph, quoted from Tim Dettmers
Some tips to pay attention to
Dual card｜Multi-card 4090 server chassis and power supply selection
As shown in the figure below, the power consumption of a 4090 single card is 450w, and the power consumption of the CPU is 300w, so the power consumption of the dual card 4090 plus CPU is 1200w, so at least a 1500w power supply is required. Considering subsequent upgrades and fault tolerance, it is best to choose a 2000w power supply.
The 4090 occupies the number of pcie slots, and the motherboard pcie slot spacing problem
Because the 4090 cancels the turbo cooling, all of them are open cooling, and the 4090 has increased a lot of thickness compared with the 3090 and other public cards. The thickness of the mainstream 4090 is between 7 and 8cm, so the multi-card 4090 is more suitable for motherboards and chassis.
The thickness of the graphics card is generally defined by the slot, and a slot is the thickness of a graphics card baffle on the chassis, as shown in the figure below. The thickness of the turbo card is two slots. The thickness of the graphics card with open heat dissipation is generally about 2.5 slots. The thickness of the 4090 is 8cm, which is equivalent to a 4-slot graphics card. The number of baffles shows that the distance between the first and second pciex16 slots of the x670e-e motherboard is 3 slots, and the distance between the second and third pciex16 slots is 2 slots. Therefore, if the extension cable is not connected, only one card can be inserted in the first pciex16 slot, and then one card can be inserted in the third pciex16 slot. In this way, the distance between the two slots is 5 slots, which can meet the heat dissipation requirements of two 4090s. Will not cause the graphics card to overheat.
The effect after installation
4090 12VHPWR 16pin interface problem
The power supply interface of 4090 adopts the new 12VHPWPR, which is the one with 12+4 interfaces below. It is reported on the Internet that some users have problems with interface melting. When purchasing a graphics card, the graphics card will be equipped with a 16pin to pcie power supply adapter cable as standard, as shown in the figure above (the first card has already been connected to the adapter cable), the adapter cable will transfer this interface to 4 pcie power supplies. In order to avoid the problem of interface temperature rise, it is best not to bend the adapter to 90 degrees, and it is best to use independent wires for the 4 pcie power cables used for switching, rather than a splitter.
The x670 motherboard does not boot, boots slowly, and the memory frequency is 3600
x670 memory frequency support
The x670 supports dual-channel memory, but if memory overclocking is required, only one memory can be inserted in each channel. If four memory are inserted at the same time, the memory frequency will be 3600
x670 does not boot, boots slowly
When booting up for the first time, the motherboard needs to test the memory frequency of the memory, so it will be very slow, the booting process lasts for several minutes, and the bias light turns yellow to indicate a memory error. At this time, you just need to wait. After a few minutes, after the memory test is completed, the system will be started with the tested parameters. And it should be noted that it is best to set the memory frequency to auto, otherwise it will easily lead to failure to boot.
flashing bios light is always on
Asustek's motherboard provides a new way to refresh the memory without the need for CPU and memory. When the motherboard is not turned on, after inserting the U disk into the flash port, press and hold the flash button and flash three times in theory, and the light will continue to flash to indicate that it is burning. But when I am writing, the light is always on, indicating that the burning failed. Later, it was found that flashing the bios required a U disk with a single partition and a fat32 format U disk . My u disk is formatted under mac, and the efi partition is automatically created, so the efi partition needs to be deleted.
