7020 small form factor - PCI Express card not recognised

You didn't give much information on the brand or specs of the cards or the systems you are installing them in. Are the PCI cards driverless? If not, did you install the drivers for the cards? Do the cards require an auxiliary power connector that wasn't plugged in?

RS232 and ISA bus have not been supported in years.  PCI 2.0 cards do not work in modern machines.

PCI-E  1.0 cards do not work in PCI-E 3.0 bus machines.  Non Registered with microsoft cards will not work in secure boot mode nor will they install. If you need 25 year old legacy ports you should be using older optiplex models like the 960 series.

Thanks RREDDON,

I don't believe the brand and spec are really relevant as these cards DO work in the previous iteration of this model, the 7010 small form factor. The cards are by StarTech; part # PEX2S553LP; 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART.

The cards come with drivers, but as the cards aren't even detected by the BIOS (as shown in photo), windows aborts any attempted driver installation. This photo was taken prior to the BIOS upgrade.

Previous Generations do not have UEFI 2.3.1 and or PCI-E 3.0 slots.

The startech cards in question are not Dell products and not supported here.

Both of those are issues for older cards.  PCI-E 3.0 slots do not clock down to 2.0 or 1.0 and therefore many other cards including sound cards and mass storage cards and TV tuner cards do not work nor are they "seen" in the slots.

Secure boot UEFI restricts hardware and drivers from loading unless the product has a security certificate from microsoft IN THE BIOS.

Perhaps you can explain then how these cards DO work in the previous iteration of this model, the 7010?

Hi,

Just found myself with a slightly different problem.

I installed a TP Link PC Express Wifi card but the computer won't boot and the "beeps" that usually indicate something is wrong are silent - i.e. no beeps.

Initially I thought that maybe I hadn't installed or secured the card properly but not the case.

Card in, no boot, card out system starts normally.

I even tried to disable the ethernet card/port but as expected, no help.

The card is a TP-Link Wireless N150 PCI Express Adapter, 2.4GHz 150Mbps  (TL-WN781ND).

Thanks in advance.

PCI-E express version 1.0 cards will have issues in PCI-E 2.X and 3.X slots.  There is no fix for this.

Then why does Dell recommend  the Broadcom 5722 Single Port Gigabit Ethernet PCI-Express Network Interface Card which the tech specs say is PCI Express x1

accessories.euro.dell.com/sna/productdetail.aspx?c=ie&l=en&s=bsd&cs=iebsdt1&sku=540-11366

Manufacturer Part : VX9M4 | Dell Part : 540-11366

Compatibility includes,

X1 is the slot connection not the VERSION of PCI-E.  

Furthermore UEFI bios certificates will prevent drivers and hardware from being seen.

Most of the answers here are simply technically wrong.  PCIe 3.0 as a standard is fully backwards compatible with PCIe 1.0, 2.0, and 2.1.  The only issues will be lower throughput based on smaller lane bandwidth.  As SpeedStep alluded to above, this is really about Dell's BIOS allowing you to see and use it.  On top of that, saying RS232 and that a PCI card is not a Dell card is unsupported is also nonsense.  If that was the case every, Dell PC would have extremely low upgrade potential, which would move them closer to Lenovo and some other vendors.  There are limitation, but 100% Dell imposed here....

PCIe 3.0 as a standard is NOT fully backwards compatible with PCIe 1.0, 2.0, and 2.1. Nor are 1.0 and 2.0 cards forward compatible.   The same speed and power and link issues that conventional pci has where   2.2 and 2.3 are universal 2.1 and 2.0 are not because 5v is dropped starting with 2.2 and up.  Link speed management does not allow for any speed any version of PCI-E any power level.

This is further qualified by saying 2.5 GT/s is Not a Subset of 5.0 GT/s and 5.0 GT/s is Not a Subset of 8.0 GT/s meaning 1.0 is not 2.0 and 2.0 is not 3.0 and 1.0 will not be seen in 3.0 and 3.0 will not work in 1.0   2.1 and 3.0 are close enough to be seemingly interoperable.

Newer machines with PCI-E  3.0 and higher bus will NOT down-clock to accommodate slower 1.0 and 2.0 cards.Since a 5.0 GT/s device must be capable of operation at either 2.5 GT/s or 5.0 GT/s data rates, the  device must meet the 2.5 GT/s and 5.0 GT/s speci
fications in their entirety.  Meeting only the  5.0 GT/s specification does not guarantee interoperability at 2.5 GT/s speeds, as is described in the following example.

This is the reason why new cards don't work in old machines aka most new 3.0 cards do not work at all in a precision 490 for example that has 1.0 bus.

Speed     For single-lane (×1)
and 16-lane (×16) links,
in each direction:

    v. 1.x (2.5 GT/s):
        250 MB/s (×1)
        4 GB/s (×16)
    v. 2.x (5 GT/s):
        500 MB/s (×1)
        8 GB/s (×16)
    v. 3.x (8 GT/s):
        985 MB/s (×1)
        15.75 GB/s (×16)
    v. 4.0 (16 GT/s):
        1.969 GB/s (×1)
        31.51 GB/s (×16)