Overclocking and Memory Stress Testing

With the limited ranges of CPU clock speeds available in the pre-release Gigabyte BIOS, it was not possible to test overclocking thoroughly. We were able to reduce multipliers and easily reach 250FSB, which was the top speed available in the pre-release BIOS. However, until we receive the updated BIOS, we cannot determine the full overclocking capabilities of the K8NXP-9.

Since there have been many reports of issues with memory on the earlier Gigabyte nForce3 Ultra, more effort went into testing memory performance on the K8NXP-9. Our memory stress test measures the ability of the K8NXP-9 to operate at its officially supported memory frequency (400MHz DDR), at the lowest memory timings that OCZ PC3200 Platinum Rev. 2 modules will support. All DIMMs used for stress testing were 512MB double-sided (or double-bank) memory. To make sure that memory performed properly in Dual-Channel mode, memory was only tested using either one dual-channel (2 DIMMs) or 2 dual-channels (4 DIMMs).

Stable DDR400 Timings - One Dual-Channel
(2/4 DIMMs populated)
Clock Speed: 200MHz
CAS Latency: 2.0
RAS to CAS Delay: 2T
RAS Precharge: 10T*
Precharge Delay: 2T
Command Rate: 1T
*Several memory tests have shown that memory performs fastest on the nVidia nForce chipsets at a TRas (RAS Precharge) settings in the 9 to 13 range. Memory Bandwidth tests were run with memtest86 with TRas settings from 5 to 15 at a wide range of different memory speeds. The best bandwidth was consistently at 9 to 11 at every speed, with TRas 10 always in the best range at every speed. The performance improvement at TRas 10 was only 2% to 4% over TRas 5 and 6 depending on the speed, but the performance advantage was consistent across all tests. All benchmarks were therefore run at a TRas setting of 10.

Using two DIMMs in Dual-Channel 128-bit mode, the memory performed in all benchmarks at the fastest 2-2-2-10 timings, at default voltage. As a further test, we ran every pair of PC3200 DIMMs that we had in the lab at their fastest timings, at DDR400 in DC mode. We had no problem with any RAM that we tested. It appears that the problems with Dual-Channel mode and memory compatibility, which were reported on the earlier Gigabyte nF3 Ultra board, have been improved greatly or eliminated on this nForce4 version.

Stable DDR400 Timings - 4 DIMMs
(4/4 DIMMs populated)
Clock Speed: 200MHz
CAS Latency: 2.0
RAS to CAS Delay: 2T
RAS Precharge: 10T*
Precharge Delay: 2T
Command Rate: 2T

Tests with all four DIMM slots populated on the Gigabyte required a 2T Command Rate with 4 DIMMs in two dual channels. This is the pattern seen on other top-performing Socket 939 boards. However, an "Auto" setting for Command Rate would not boot, and we had to force a 2T setting in BIOS with 4 DIMMs. Once 2T was set in BIOS, there was no problem running 4 DS DIMMs at the same aggressive 2-2-2-10 timings we had used with 2 DIMMs.

Basic Features Test Setup
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  • wohlgek - Thursday, February 24, 2005 - link

    Does anyone know when these boards will be available? Also, on Gigabyte's website, they show the board as compatable with only CPU's with the 130 nm process. What about the Winchester core? Is it safe to assume that all you would need is a bios update to use the Winchester core over the Newcastle? (Sorry if it is a newb question).
  • Marcosoft - Thursday, December 23, 2004 - link

    I just bought this card and i'm having troubles to make it work.

    I have a 20-pin plug so i leaved the 4 pins out !
    So far, i shouldn't have any problems ?

    But do i need to plug at least a ATX_12V next to the CPU ?
  • Filibuster - Saturday, December 4, 2004 - link

    When are these supposed to be available?
  • TheDevil - Wednesday, November 24, 2004 - link

    God I pray to U to keep this boards pricing under 400$ (18.000 Rs) in the Excise ridden country of India :@ so I can promptly Buy it asap.
  • peegee - Saturday, November 20, 2004 - link

    ONLY 4Gb - why??
    surely it could address 8Gb, as 2Gb chips are becoming more available.

    thats a deal breaker for me - I need 8Gb.
  • flexy - Wednesday, November 17, 2004 - link

    >>>
    #37 - It has a 24-pin ATX with a plug for 4-pins so it can be used with standard 20-pin. It is shipped with the plug in place so there is no confusion with where the 20-pin goes. Pop out the plug with a fingernail and it is 24-pin.
    >>>

    Wesley,

    Question 1 : Are there any benefits in using the 24p method over the 20pin method ? The additional 4 pins provide power the for pci-e slot from what i know.

    If i leave the 4 pins out...isn't there any disadvantage - eg. less power provided to the pci-e card etc ?

    Was there a manual with the nforce 4 boards you tested where they mention anything in that matter and recomend 24p over 20p ? Or does it matter at all ?

    Question 2:
    does that board have a pci-lock ??? Eg. i am shooting for pretty high 'FSB' (280, 290) and need a working pci-lock for SATA :)


    thanks !!
  • Wesley Fink - Tuesday, November 16, 2004 - link

    #42 - Thanks for asking the question. Those values are in fact an error in the pre-release BIOS that have been corrected with a BIOS update. There are not any AGP voltage adjustments on the nF4 board.

    I have corrected the table of Features. I apologize for not catching that in the review.
  • jcromano - Tuesday, November 16, 2004 - link

    #40 Thank you very much for your answers. I felt at the time that my questions were probably pretty dumb, but I decided to ask anyway. And now, I'm going to risk yet another dumb question: Page 2 of the review ("Basic Features") has a table that says the AGP voltage can be set to normal or to several overvolted values. Why in the world would you need an AGP voltage if there's no AGP slot, and how would that voltage be delivered? (It is, in fact, that table that convinced me the long black slot must be an AGP slot and sent me looking elsewhere for the PCIe slots.)
  • Wesley Fink - Tuesday, November 16, 2004 - link

    #37 - It has a 24-pin ATX with a plug for 4-pins so it can be used with standard 20-pin. It is shipped with the plug in place so there is no confusion with where the 20-pin goes. Pop out the plug with a fingernail and it is 24-pin.

    #39 - Our launch review of the nForce4 did a complete performance comparison with nF3 Ultra, so we saw no reason to repeat that information. There is basically no performance difference in the 2 chipsets. The review is at http://www.anandtech.com/cpuchipsets/showdoc.aspx?...

    nF4 is for PCIe and nF3 is for AGP. nF4 also adds a very few features like 3Gb/s SATA. There is also no current difference in performance between AGP and PCIe video cards - the same model yields the same performance - but that will likely change in the future.
  • Gioron - Tuesday, November 16, 2004 - link

    #34:
    No, this board only has a PCI-E x16 slot for graphics card, no AGP slot. The long black slot just above the gold-colored chipset is the PCI-E x16 slot. The white slots to its left are the PCI slots, not the PCI-E slots. The PCI-E x1 slots are actually the rather short, black ones on the right side of the long PCI-E x16 slot. Note that all of these slots are positioned on the side of the board with the external motherboard connections, and are in front of slot covers that you can see in the back on both of the pictures. This is important for an expansion slot, so thats always the first place to look.

    The red and green slots you mention are actually the IDE sockets for either hard drives or CD/DVD drives. The black slot below them is for a floppy drive. The yellow sockets in the corner look like USB sockets, and at two ports per socket, that supplies all 6 of its non-paneled USB ports. The red sockets are SATA, although I wish they would've color coded them to indicate which are 3G/s and which are 1.5G/s.

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