FSB Overclocking Results

Front Side Bus Overclocking Testbed
Processor: Pentium 4 Smithfield LGA 775
840EE Dual Core 3.2GHz
CPU Voltage: 1.4825V (1.4000V default)
Memory Settings: 3-2-2-8 at 667MHz
Memory Voltage: 2.1V
SPP Voltage: 1.58V
FSB Voltage: 1.40V
Cooling: Thermaltake Big Typhoon
Power Supply: OCZ Power Stream 520
Maximum CPU OverClock: 250fsb x 17 (4250MHz) +33%
Maximum FSB OverClock: 255fsb x 16 (4092MHz) +27%

This board is an average overclocker when comparing it to the Intel 975X boards. At these overclock settings, the system was able to complete all of our benchmark test suites three consecutive times and run Prime95 and SuperPI without issue. We lowered the CPU multiplier to 14, but could not overclock past a 252FSB setting. We changed the LDT ratio to several different settings without success. These results continue the pattern in which we see with the nForce4 Intel Edition chipsets not reaching high FSB speeds, but being successful in overclocking the CPU at standard FSB settings.

We installed our 955EE CPU and were able to reach the highest CPU overclock recorded for our sample unit. The board performed flawlessly at this setting and reaching 4.55GHz on air with this chip is impressive. However, all attempts at lowering the multiplier and extending the bus speed past 1180MHz resulted in failure.

Updated 955EE Testing

We flashed the board to the latest bios, NFUIA210.BST, installed our 955EE CPU, and were able to reach a very stable 4.62GHz with air cooling. Our previous attempts at this multiplier resulted in a stable 4.50GHz at a bus speed of 1060MHz. We were able to boot the machine at 4.76GHz but could not complete our benchmark testing.

Memory Stress Testing

Memory stress tests look at the ability of the Biostar TForce4 U 775to operate at the officially supported memory frequencies of 667MHz DDR2, at the best performing memory timings that the Corsair CM2X512A-5400UL revision 1.3 will support.

Biostar TForce4 U 775
Stable DDR667 Timings - 2 DIMMs
(2/4 slots populated - 1 Dual-Channel Bank)
Clock Speed: 200MHz (800FSB)
Timing Mode: 667MHz - Default
CAS Latency: 3
RAS to CAS Delay: 2
RAS Precharge: 2
RAS Cycle Time: 8
Command Rate: 1T
Voltage: 2.1V

The Biostar TForce4 was very stable with 2 DDR2 modules in Dual-Channel at the settings of 3-2-2-8 at 2.1V. We will now install all four available memory slots that result in more strenuous requirements on the memory subsystem than testing 2 DDR2 modules on a motherboard.

Biostar TForce4 U 775
Stable DDR667 Timings - 4 DIMMs
(4/4 slots populated - 2 Dual-Channel Banks)
Clock Speed: 200MHz (800FSB)
Timing Mode: 667MHz - Default
CAS Latency: 3
RAS to CAS Delay: 3
RAS Precharge: 3
RAS Cycle Time: 8
Command Rate: 2T
Voltage: 2.10V

The Biostar TForce4 was completely stable with 4 DDR2 modules in Dual-Channel operation at the settings of 3-3-3-8, but required the command rate to be increased to 2T. We tried several combinations of memory settings at the 3-2-2-8 settings, but the board was not stable enough to complete our test suite.

Biostar Tforce4 U 775: Features Test Setup
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  • Calin - Friday, February 17, 2006 - link

    What about sorting the graphs based on the min frame rate?
    :) I guess some people are never happy ;)

    Great job, and a nice article!
  • yacoub - Thursday, February 16, 2006 - link

    Once you've owned a passively-cooled motherboard like any of the recent Asus ones, it's hard to even look at one with a fan on it. It also makes shopping for a motherboard a LOT easier because you just cross off all the fan ones right away (unless you're a mod fiend who will actually go through the trouble of buying a chipset cooler or two and rip the fan assembly off the brand new expensive motherboard and hope that cools it well enough).
    I hope more manufacturers take up the passively-cooled trend.
  • Gary Key - Sunday, February 19, 2006 - link

    I disabled the fan and only witnessed a 2c increase on the MCP. Biostar could have saved a few cents and put towards a Gigabit Lan solution. ;-)
  • Marlin1975 - Thursday, February 16, 2006 - link

    Sound and ethernet. Why do companies keep using the realtek junk. bad quality (part and drivers) and juts shows a motherboard company does not care when they use realtek.

    Any time I see realtek on a board I think the sound and even ethernet were a after thought like "Oh we forgot sound. Lets just put the cheapest POS on there. OK"


    COME ON. Good chipset but you come so close then put junk on for sound and so forth.
  • Myrandex - Thursday, February 16, 2006 - link

    For me that issue doesn't matter at all. My Sound Blaster Audigy 2 is still doing its job nicely, and getting a nice onboard sound solution still gets disabled all the same. Now for integrated SB Giga-bite ethernet is something that comes into play with my decisions, and I have been real happy with Giga-byte putting ieee1394b controllers on their boards (and am hoping that external HDD 1394B cases fall in price sooner or later). Integrated wireless is a neat feature some boards have as well.
  • Wesley Fink - Thursday, February 16, 2006 - link

    Realtek does have some really cheap audio and LAN chips, but they also have some pretty decent products. In the High Definition area the ALC882 is a really good audio codec with an excellent feature set that produces decent sound and very low noise. If you go through some recent reviews you will see both Gary and I have praised the Realtek ALC882, which is NOT included on this Biostar board :-)
  • Marlin1975 - Thursday, February 16, 2006 - link

    yea but you also go on about bad drivers that are STILL in need fo a update and other issues. So sorry but realtek is still junk in my book. That and with so many other options from VIA's envy, c-media, etc... why use something that has problems and are STILL being addressed today?
  • DigitalFreak - Thursday, February 16, 2006 - link

    I agree. Using Realtek for LAN is bad enough, but using a PCI solution? That's unacceptible. Even if you don't care about GbE, the CPU utilization is rediculous!
  • Peter - Tuesday, February 21, 2006 - link

    The RTL8201 is not a PCI ethernet chip, it's just a PHY companion to the chipset's own engine. This is a research error in the article.

    http://www.realtek.com.tw/products/products1-2.asp...">http://www.realtek.com.tw/products/products1-2.asp...

    The abysmal performance rather more likely stems from transmission errors or poor signal quality - which would point to a damaged or poorly laid out board, or bad cabling.

    PHYsical interface chips have zero influence on throughput, as long as signal integrity is being maintained - and as far as that is concerned, Realtek's solution is definitely up to the job. Question is, is the mainboard's layout?
  • Peter - Tuesday, February 21, 2006 - link

    ... and of course, we need to keep in mind it's a 10/100 PHY, not a gigabit PHY.

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