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Jetway 939GT4-SLI: Gem with a New SLI Twist

by Wesley Fink on August 24, 2005 8:30 AM EST
46 Comments | Add A Comment
46 Comments

Basic Features: Jetway 939GT4-SLI

 Specification  Jetway 939GT4-SLI-G
CPU Interface Socket 939 Athlon 64
Chipset nForce4 SLI (single chip)
BUS Speeds 200 to 400MHz (in 1MHz increments)
PCI/AGP Speeds Asynchronous (Fixed)
PCI Express 100 to 145MHz in 1MHz increments
Core Voltage Auto, 1.10V to 1.55V in 0.025V increments (with 4000+)
PLUS +50mv to +350mv in 50mv increments
Highest vCore 1.90V
DRAM Voltage Auto, 2.55V, 2.65V, 2.75V, 2.85V, 3.05V, 3.25V
Chipset Voltage 1.5V, 1.6V, 1.7V
Hyper Transport Ratios Auto, 200 to 1000 in 1X (200) increments
LDT Bus Transfer 16/16, 16/8, 8/16, 8/8
LDT Voltage 1.25V, 1.35V
CPU Ratios Auto, 4x to 25x in 1x increments
DRAM Speeds Auto, DDR200, DDR266, DDR333, DDR400
Memory Command Rate 1T, 2T
Memory Slots Four 184-pin DDR Dual-Channel Slots
Unbuffered Memory to 4GB Total
Expansion Slots 1 x16 PCIe Slots
2 x8 PCIe Slots (SLI)
2 x1 PCIe
3 PCI Slots
Onboard SATA 4-Drive SATA 2 by nF4
Onboard IDE Two Standard NVIDIA ATA133/100/66/33 (4 drives)
SATA/IDE RAID 4-Drive SATA 2 PLUS
4-Drive IDE (8 total)
Can be combined in RAID 0, 1, 0+1
Onboard USB 2.0
IEEE-1394		 10 USB 2.0 ports supported nF4
No FireWire ports
Onboard LAN PCIe Gigabit Ethernet by Marvel 88E8053 PHY
(Dual LAN on 939GT4-SLI-D)
Onboard Audio 7.1 AC'97 Digital Audio with Realtek ALC850
8-Channel codec with 6 UAJ audio jacks
Other Features AMD Dual-Core (X2) Support
BIOS Phoenix Award (6/08/05)

Jetway is not a huge motherboard company, and we often see the worst selection and range of BIOS adjustments from the smaller companies in the market. You can throw that notion out the window with the Jetway because it has an extremely complete and broad range of adjustments available in the Phoenix-Award BIOS. The 200-400 CPU Clock Speed adjustment range is extremely wide, and it is supplemented by a useful range of vCore adjustments to 1.90V and Memory Voltage adjustments to 3.25V.

We would like to see an even broader range of vDIMM to 3.5V or higher to support the high voltage memory from OCZ and Mushkin, but there are so few boards that offer adjustments to the 3.25V offered by Jetway that it is difficult to complain. Someone involved in the design of this board and BIOS truly understood what the AMD enthusiast is looking for, and they did a great job in delivering those options. Jetway also implements all the nF4 chipset features.


Click to enlarge.

We are usually evaluating a Tier One board when we praise layout, but the Jetway is just about perfect in layout. The 24-pin ATX connector and the 4-pin 12V are both on board edges where they belong. Also noteworthy is the fact that both the IDE and floppy connectors are located on the upper right edge of the board - exactly where they belong for best access. The board is such an excellent design that it really deserves a better manual. The one provided is barely adequate, but you can find what you are looking for with a little effort.

Many nForce4 boards place dual-channel memory side-by-side in their designs, making cooling of high-speed memory even more difficult. Jetway staggers dual-channel by making dual-channel the matching color slots. With 2 DIMMs, this gives more room for heat dissipation and cooling.

We were even more surprised to see diagnostic LEDs and momentary switches for on/off and reset on the Jetway 939GT4-SLI.

Heat sinks on the mosfets is another feature seen on boards designed for overclocking like the DFI nF4 SLI. Jetway went to the additional expense of placing sizable heat sinks on the mosfets. There are very few boards that provide these enthusiast level features, and we're pleased to report that this Jetway is one of them. Considering that the Jetway is selling for around $129 on the web, this is particularly noteworthy.

Index Overclocking: Jetway 939GT4-SLI
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  • KublaKhan - Sunday, September 11, 2005 - link

    I bought this board recently from newegg but haven't tried it out yet. What is the purpose of the power connector immediately above the PCI-E x1 slot? I thought it might be used for extra power for the PCI-E cards but then with 24 pin moboard connectors and graphics cards with their own additional power connectors, isn't there enough power already? Also, nowhere in the documentation nor reviews of this board on other hardware sites do I see any indication that this board supports SATA-2. Wesley, where did this info come from?

  • raildogg - Thursday, September 1, 2005 - link

    guys, I've heard that they are the identical boards, however, some of their specs may not be. are they the exact same boards? not sure

    check this out

    http://www.newegg.com/Product/ProductCompare.asp?C...">link

  • kennyG - Sunday, September 4, 2005 - link

    yeah ok..but the eVGA board doesn't have 3 PCI Express x16??
    At lease they dont state this infomation on the site(Newegg link you gave)..Now if the jetway bios updates the evga board to the same state then I think it could make a great buy..And yes they both(eVGA&jetway) need to make there colors a little make adult like.

  • Wesley Fink - Tuesday, September 6, 2005 - link

    Look at the Newegg EVGA pictures. The EVGA board does have 3 x16 slots. The Newegg specs are not in agreement with the pictures. and the pictures match other EVGA pictures and specs we have seen. The EVGA and Jetway appear the same board with different BIOS. Many Forums are reporting success with flashing the EVGA with the Jetway BIOS.

  • inkysowner - Wednesday, September 7, 2005 - link

    Hi Wes,

    I have the evga board and the same memory 2x512 with 2 evga 7800gtx's(acs kits in the box), just want to verify this.
    "Tests used OCZ PC3200 Platinum Rev. 2, which uses Samsung TCCD chips. All memory ran at 2-2-2-7 timing in all benchmarks."

    So at 12 x 244 you were running 2-2-2-7 Command 1T and at what voltage.

    I have a 4400+ that I am trying to get up near 2.7 and at the stock multi of 11 and those timings at 244 I should be in the sweet spot, I think the aquagate-mini should be able to cool the processor enough at those settings, esp based on the new inquirer article review of the coolermaster aquagate mini-120 which I have in a cm stacker.

    Thanks in advance

  • Wesley Fink - Wednesday, August 31, 2005 - link

    There are now several reports on the web of eVGA users successfully flashing with the latest Jetway BIOS. Users are also reporting that the Jetway BIOS offers more options and better overclocking that the eVGA which appears otherwise to be the same motherboard with a different, more subdued, color scheme.

  • kennyG - Sunday, September 4, 2005 - link

    do you have any links..I'd like to read what others are getting as far as overclocks ?

  • Fozzik - Thursday, August 25, 2005 - link

    I noticed that pretty much know I/O benchmarks were run...

    Do we know that this board doesn't have any glaring problems with onboard NIC, USB, etc? The new Sapphire boards based on ATI's Xpress 200 chipset look great, except for seeminly (an difficult to explain) lousy performance of their integrated divices on the PCI-Express bus. I know this isn't the same chipset, and that all Nforce 4 SLI Implimentations are probably similar...but I'm just wondering since none of those benchmarks were included in this review. Let's get right down to it... I'm paranoid about Jetway. ;) Usually when things look too good to be true, they are.

  • Wesley Fink - Sunday, August 28, 2005 - link

    We have already tested I/O performance of all of the chips on the Jetway board, so we saw no valid reason to retest the IO performance. The Marvell PCIe PHY for Gigabit LAN is an excellent performer and is just a Physical Layer to the nF4 chipset Ethernet hooks. SATA 2, USB and IDE are controlled by the nForce4 SLI chip, there is no onboard firewire or additional SATA 2 controller, and the Realtek ALC850 audio codec is used by almost every nF4 motherboard.

  • Fozzik - Sunday, August 28, 2005 - link

    Thanks for the reply. =)
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