nForce4: PCI Express and SLI for Athlon 64
by Wesley Fink on October 19, 2004 12:01 AM EST- Posted in
- CPUs
The nForce4 Family
The nVidia Reference Board was shipped with the nForce4 Ultra chipset. The features of the nForce4 chipset family should be very familiar to nForce3-250 users, since it builds upon the feature set of the nForce3-250 family that was introduced in April. All of the new nForce4 chipsets support 20-lane PCI Express, native Gigabit Ethernet (on-chip), full nVidia RAID features, 10 USB 2.0 ports, nVidia Firewall 2.0, and the new nTune Performance utility. From there, however, the 3 members in the new nForce4 family differ a bit in features depending on the target market for the chipset.
nForce4 - the basic value chipset for 939 and754. This is the chipset that you will likely find in Socket 754 and low-end Socket 939 boards selling for less than $100. The nF4 is targeted at value boards, but it still includes on-chip gigabit Ethernet capabilities, support for 10 USB, full nVidia "any drive" Raid capabilities, support for nVidia Firewall 2.0, and support for the nTune Performance Utility. Four SATA drives are supported at current 1.5GB/s speeds plus four PATA (IDE) devices. The big disadvantage of the vanilla nF4 chipset is that it only supports 800 Hyper Transport. In addition, the HT bus is locked on the basic nF4 to prevent overclocking of the Hyper Transport. This means that the basic nForce4 is not a good choice for the enthusiast, who is better served by the Ultra and SLI chipsets.
nForce4 Ultra - the mainstream nF4 designed for boards that will sell in the $100 to $150 price range. In addition to nF4 features, you will find full support for an unlocked 1000 Hyper Transport, support for 3Gb/s SATA drives, and nVidia's secure networking engine, which is called ActiveArmor.
nForce4 SLI - the high-end version of the nF4 is designed for boards that will sell at $150 or more. The nF4 SLI is the only version to support programmable PCI Express lanes, which allows the use of either a single or dual Video Card. A single GPU is supported by an x16 PCIe slot, which can be reprogrammed to two x8 PCIe slots to support two video cards in SLI mode. All features are, otherwise, the same as nForce4 Ultra.
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Zac42 - Tuesday, October 19, 2004 - link
I think that it has to be two Nvidia cards with an SLI connector. You are thinking of the alienware video array, which theoretically can use two different branded cards.GhandiInstinct - Tuesday, October 19, 2004 - link
Wesley,So in SLI, I can put any two video cards together? No matter the spec difference or maker difference? New and old? Future and past?
microAmp - Tuesday, October 19, 2004 - link
I take it the SLI benchmarks from nVidia were done at about 1600 x 1200 resoultion?Wesley Fink - Tuesday, October 19, 2004 - link
Kris -Anand and I got some hands-on time with the SLI system while we were visiting nVidia. The benchmarks we ran confirmed the numbers reported for the 6800 Ultra single and SLI. The test system was an Asus SLI motherboard with a 4000+ CPU. While we did not personally run benchmarks with the 6600GT SLI or the 6800GT SLI we have no reson to doubt nVidia's numbers based on what we did confirm.
The Reference board is NOT SLI, which is why SLI testing was limited to our time with nVidia.
KristopherKubicki - Tuesday, October 19, 2004 - link
#6 those are NVIDIA's benchmarks, not actual 3rd party confirmed benchmarks.Kristopher
Wesley Fink - Tuesday, October 19, 2004 - link
#2 and #4 -SLI Performance tests are in a table on page 3. Two 6600GTs don't outperform a 6800 Ultra, but they do outperform a 6800 GT.
ksherman - Tuesday, October 19, 2004 - link
#4, from what ive heard, it is probablyh likely that two 6600GTs would definetly cream the 6800 ultra. I do agree that we need some SLI benchies!!!ariafrost - Tuesday, October 19, 2004 - link
*Drool* Anyone know how much of a performance boost would come from SLI yet? I'm wondering if two 6600GTs would outperform a 6800 ultra.glennpratt - Tuesday, October 19, 2004 - link
Page 2"While nVidia was not ready to ship nForce4 SLI reference boards for review, they were demonstrating a major manufacturer's nF4 SLI board with a pair of nVidia 6800 Ultra video cards. We also got to play with the SLI system with an Athlon 64 4000+ CPU, confirming benchmarks that were supplied by nVidia."
Jincuteguy - Tuesday, October 19, 2004 - link
why didn't anand did any SLI performance test? i thoguht this board suppose to have SLI.