PCIe slots and description (from CPU) and (from chipset)

Biggilus

Biggilus

Biggilus

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14 Aug 2009
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197
Hi hi,

Looking at an AM5 B series board for a new rig (had plenty help and suggestions so far) and wondering if those descriptors are anything I need to be wary of? What do they actually mean?

I'll only be gaming and light office work, so a decent GPU and one fast one 'slower' SSD is what I'm after. Plenty of boards with PCIe 5.0 support for M.2 drives and PCIe 4.0 x16 which would be adequate I'm assuming for my needs.

Just didn't know if the from CPU/from chipset would have any impact on my use.
 
The CPU lanes are a bit faster than chipset lanes (both for SSD and for graphics card), but it's not a big deal. With B650, you'll usually get 1x PCI-E 5.0 M.2 slot and 2x PCI-E 4.0 M.2 slots, with a PCI-E 4.0 full-length graphics slot.

Some of the 'lower-end' boards have all PCI-E 4.0 (B650 Gaming X), or only 2x M.2 slots (MSI B650-P).

You'd need B650E for a PCI-E 5.0 graphics slot.
 
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Awesome cheers again for your help (seem to be guiding me on these sub forums!).

Liking the look of the Asus ROG B650A, but for an extra £20 the Asrock B650E is there..

Deffo need to do more homework on these boards, what I would like is super fast POST to Windows time but have heard all AM5 boards are actually pants on that front - some people quoting 40-45 secs from power on to desktop!
 
Biggilus said:
Deffo need to do more homework on these boards, what I would like is super fast POST to Windows time but have heard all AM5 boards are actually pants on that front - some people quoting 40-45 secs from power on to desktop!
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I'm not sure how helpful it is, because bios maturity is changing all the time, but in HUB's roundup, Gigabyte was the fastest (23 seconds, Asus were 43 seconds, MSI slowest at 53 seconds).
 
Biggilus said:
Literally just watched that video! Now the Gigabyte B650 Auros Elite AX for £270 is on my most likely list.
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I like that board a lot, good VRM, 8-layer PCB, rear USB 3.2 Gen 2x2 USB Type-C, 3x M.2 (1 is PCI-E 5.0), but the downside is the sound: no rear spdif, only 3 rear jacks and an unspecified (probably nothing special) codec.
 
Just a heads up, you don’t need PCI-e 5.0.

Rather get an SSD that has a large DRAM cache and great controller than a drive with tons of speed.

No general consumer will make use of even a PCI-e 4.0 drive speed unless they buy a 6500XT which has half the pci-e lanes it should have.

Hope this helps you save some money.
 
Tetras said:
I like that board a lot, good VRM, 8-layer PCB, rear USB 3.2 Gen 2x2 USB Type-C, 3x M.2 (1 is PCI-E 5.0), but the downside is the sound: no rear spdif, only 3 rear jacks and an unspecified (probably nothing special) codec.
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Always used onboard sound for the past ten years plus, but no idea if the older boards had a better codec (Z97-K) or I'm just tone deaf. I'm using the logitech Z906 5.1 setup and I know the audiophiles in sound city subforum will crucify me for that! Did look at a USB DAC but that's another £100. Maybe that's worth a punt regardless of what board I end up getting though.
 
JollyJamma said:
Just a heads up, you don’t need PCI-e 5.0.

Rather get an SSD that has a large DRAM cache and great controller than a drive with tons of speed.

No general consumer will make use of even a PCI-e 4.0 drive speed unless they buy a 6500XT which has half the pci-e lanes it should have.

Hope this helps you save some money.
Click to expand...
Ah sweet, did keep my eyes open for 5.0 M.2 support as it seemed to be available on the cheaper boards.
You mentioned 6500xt, I'm looking at getting a 6800xt, would that also have an effect on lanes?
 
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