HP T5720: Hardware 

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I have two examples of the HP T5720 (model: HSTNC-001L-TC) one was manufactured in February 2007 (product no: 398132-003) and one in December 2007 (product no:398135-003).

Specifications

Processor
Type    Speed	AMD Geode NX1500 1GHz
Memory
Flash    RAM	512MB or 1GB 256MB, 512MB or 1GB
Video
Chip    Max resolution	SiS741GX 2048 x 1536 32-bit colour
Ports
Network    USB    Serial    Parallel    PS/2	10/100 6 x USB2.0 1 1 2 (Kybd and Mouse)
Power
Plug    Off    Running	12V 4 W ~24W
Dimensions
H x W x D (mm)	250 x 66 x 206 (Excluding Stand)
Security
	Kensington Lock Slot Mounting Bracket

In the February 2007 model the embedded operating system is Windows XPe sp2 with 256MB RAM.
In the December 2007 model the embedded operating system is Windows XPe sp3 with 512MB RAM.

CPU

For those to whom it matters here is some detail from Linux's /proc/cpuinfo

vendor_id	:	AuthenticAMD
cpu family	:	6
model	:	8
model name	:	AMD Athlon(tm) Processor
stepping	:	1
flags	:	fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow eagerfpu 3dnowprefetch vmmcall

PCI

00:00.0 Host bridge: Silicon Integrated Systems [SiS] 741/741GX/M741 Host (rev 03)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] LPC Controller (rev 25)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 IDE Controller
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0)
00:03.0 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.2 USB controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:0a.0 Ethernet controller: VIA Technologies, Inc. VT6102/VT6103 [Rhine-II] (rev 8d)
01:00.0 VGA compatible controller:
             Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter

Power Supply

The unit requires a 12V supply. The label on the side panel gives a power rating of 12V 3.33A.

Expansion

Flash: The Flash memory (middle lower left in the photograph) is easily replaceable. It's a DOM plugged into a standard 44-pin IDE connector.

RAM: The RAM is a standard 200-pin SODIMM. The one fitted is manufactured by hynix and is marked: PC2700S-25330 512MB DDR 333MHz CL2.5. The part number is HYMD564M646CP6-J AA-C.

CPU: Like the t5730 the CPU is socketed. In this case the AMD NX1500 is a Socket A (Socket 462) processor. The NX1500 has a TDP of 9W and runs with a core voltage of 1.1V. I have no experience of fitting an alternative CPU.

However Pawel Multan has experimented using AMD processors he'd recovered from old computers. Note: These replacement processors have TDP figures of over 60W so you'll need to think about cooling and a beefier power supply... Also they run with different core voltages (~1.6v). Not having tried it myself I'm not sure what BIOS options you have to play with here.

Pawel emailed:

"I tried three different processors:

AMD Athlon 1800+. Only got a flashing power LED.

AMD Athlon XP 2000+ - AXDA2000DUT3C running at 1.6GHz. Maybe too much power drain for my PSU. Beeps and reboots.

AMD Athlon XP 2500+ - AXDA2500KV4D running at 1.46GHz. Runs 100% (until it gets too hot!). Can watch videos on youtube on 480p."

PCI: There is a PCI socket on the motherboard that can be used in conjunction with a riser card and extension housing. (EK530AA HP t5720 PCI Expansion Module).

Click on the photo for a larger version.