Some specifications on the Tyan S2915
As I understand it 'Marketing' has decided to drop the K9WE Name.
Tyan is still using the Thunder name.
This page will be updated dally as information is released.

FLASH - First K9WE speed test - Discussion in forum.
Another test - A comparison between the S2915 as assembled by HP and an Intel system.

Clouds on the horizon - the S2915 has problems.  Well it has been out a while but the BIOS is not right yet.
 

All 2000 Series Opteron Socket F. Summaries not complete, click for PDF.
S4985 Thunder n4250QE This is the most fun one. imagine quad sockets with quad cores.
Quad Opteron, 2 PCIx 16 with 16 links, 2 PCIx 16 with 4 links, 1 PCI 32 Bit 33 MHz..
nVidia Chipset, on board video. 2 ATA-133, 8 SATA at 3Gbs, Raid 0,1.

S3992 Thunder h2000M
Dual Opteron, 2 PCIx 16 with 8 links, 3 PCI-X 64 Bit 133/100 MHz, 1 PCI 32 Bit 33 MHz.
1 PCI-X Tyan Tyro, Broadcom chipset, on board video, 1 ATA-133, 4 SATA at 1.5Gbs, Raid 0,1,5,10.

S3970G2NR/G2N-U Thunder n4250QE
Dual Opteron, 1 PCI-X 64 Bit 133/100 MHz, 4 PCI 32 Bit 33 MHz.
Broadcom chipset, 1 Tyan Tyro SO-DIMM, 1 ATA-133, 4 SATA at 1.5Gbs, Raid 0,1,5,10.

S2927 Thunder n3600B
 Dual Opteron, 21PCIx 16 with 16 links,  PCIx 16 with 8 links, 3 PCI 32 Bit 33 MHz.
nVidia Chipset, 21ATA-133, 6 SATA at 3Gbs, Raid 0,1,5,JBOD

Still not released S2915
Dual 1207 pin sockets
Opteron 2000
5 phase VRM power converters.
nVidia chipset NPF3050 & NPFf3060
Eight Memory slots up to 32GB DDR2
  At 400, 533 and 667 speed

Four PCI x16 slots (quad SLI anyone OR quad dual SLI)
  2 at x16,   2at x8
OR with 4 Quadro NVS 440 you can have 16 monitors total.
Two PCI-X at 100Mhz OR One at 133Mhz (this is PCI-X standard)
10 USB 2.0
2 Firewire 1394a
Audio
  RealTek ALC262
  SPDIF-out

Six SATA-II
Eight SAS ports (SAS ports can use SATA drives)

(you could have 14 SATA drives if you wish)

Most of the other stuff is the same as on the K8WE. BUT it looks like Tyan listened to the negative points on the reviews and fixed them for the K9WE