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Gigabyte's GA-8IEXP 533/400 MHz FSB?

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July 23, 2002 11:09:56 AM

Gigabyte's GA-8IEXP
Socket 478 for Intel® mPGA478 Pentium® 4 processor in 478 pin package Spec and advertised as 533/400 MHz FSB.
I find my system is set at 400. Is that caused by the P4 1.8 Gig CPU? I have 2 sticks of 512 PC2100 in it. The memory is rated at 266 which I understand is a double clock 133.
IF the 533 is built in the MB design, did I choose the wrong CPU? Will that CPU do 133 without violating the Intel spec? What P4 CPU should I have chosen for that board to take advantage of the 533?
How does the PC2100 memory affect the 533 decision?.

Please keep in mind that I'm trying to learn. I'm not comfortable overclocking. I just want to know if I'm getting the best performance within specs. Or what spec for the next one?
Productivity is a bit better than double my P3 700 (100) but not close to double my P3 933EB (133). One run takes about 10-11 hours on the 933EB (133) It takes about 6-7 hours for the same run on the 1.8 Gig (400).

I couldn't find the CPU limitations of the board. Which of the following will work in that MB?

533 MHz system bus: 2.53 GHz (0.13 micron), 2.40 GHz (0.13 micron), 2.26 GHz (0.13 micron)

Are they worth the extra cost? How much hotter are they?

I'm averaging about CPU temps of 35 C at rest and about 46 C at full throttle.

Every working computer must be improved .... or replaced ...
a b V Motherboard
a b à CPUs
July 23, 2002 5:27:59 PM

In order to get "533" bus at stock clock, you need to have a 2.26 2.4"b", or 2.53GHz chip. That is in actuality 133MHz bus speed. Most of the people in here have overclocked their 1.8"a" CPU's to 133MHz FSB to get 2.4GHz. If you WERE comfortable with overclocking, you would first have to make sure you had the "1.8a" processor, which has 512k cache, instead of the previous version. And then you might need to raise the core voltage.

PC2100, aka DDR266, only has 2/3 the bandwidth of PC800, and 1/2 the bandwidth of PC1066. The only DDR memory that even comes close to the performance of RDRAM for the P4 is PC3200, aka DDR400.

All of those CPU's will work in you motherboard. There are no "CPU limitations" yet, and won't be until Intel releases a new chip architecture or higher bus speed.

No, they aren't worth the cost, most people in here who want that kind of performance would rather overclock the 1.8a. You're biggest performance handicap right now is the PC2100 memory. Unless you're running a very restrictive case, you needn't worry about heat.

<font color=blue>At least half of all problems are caused by an insufficient power supply!</font color=blue>
July 23, 2002 6:48:21 PM

Thanks again Crashman for a very detailed and understandable answer. It sounds like I have room to grow with this MB and that's not a bad thing.

Intel's speed check utility says the CPU is 1.80A. Is that specific enough to be sure that it fits your answer and is overclockable if I were to get brave? Or do I need to investigate the CPU further. I know the MB comes with a overclock utility.

IF and when CPU and memory prices do come down, will the other PCxxx memory work on my MB? I was told for example not to get PC2700 because the vendor was not sure it would work on my MB. Which memory would be better for the 133 FSB when I upgrade the CPU?

Yes, this is a more restrictive case than I have been using .... but it seems to be doing ok. It's a midtower averaging 33-37 C at idle running the net etc and a steady 45-47 C at full throttle for 6-10 hours at a time. One reason might be the 10 fans in it not counting the factory CPU fan and the double fan in the 450 Watt PSU. Vents on all sides too.

Thanks again. (8<))

Every working computer must be improved .... or replaced ...
Related resources
a b V Motherboard
a b à CPUs
July 23, 2002 7:34:36 PM

Well, your present CPU should go to at least 2400MHz ("533" bus at 133MHz clock) with at most 1.65v needed to get there. And it shouldn't get too hot. Oh, and it definately won't burn out.

PC2700 would work with your board. In all actuality, if someone introduced 250MHz DDR SDRAM (DDR500), it would still work on your board. Memory can always be clocked downward. For your board, I would recommend PC3200 (DDR400), which would run at "DDR354" speeds on your board using the 3:4 FSB:RAM frequency ratio at 133MHz FSB (2400MHz CPU). PC3200 may be listed as Cas2.5, but when reduced from 200MHz clock to 177MHz clock in the situation I just recomended, should have no problem running the faster Cas2 settings.

<font color=blue>At least half of all problems are caused by an insufficient power supply!</font color=blue>
July 23, 2002 9:25:59 PM

Interesting. That PC400 memory is not that much of a price differece than the PC2100. My MB manual says that DIMM2 and DIMM3 share some resources creating a conflict if I try a third stick of memory. Any idea if they will overcome that so that I can use three sticks instead of two? I have the new F5 BIOS flashed into place that did something relative to DIMM...not sure what.

Every working computer must be improved .... or replaced ...
July 24, 2002 11:46:33 PM

Hey crash, I just returned one of these boards today,they do not have ram frequency ratios like you mention in the bios, your only options are AUTO, 2.0 and 2.3.or 2.6 I can't remember.I'm curious what graphics board are you using, I could'nt get my radeon 8500 to work with this board.

"I'd rather laugh with the sinners than cry with the saints."
July 25, 2002 6:55:22 AM

Your comment came to me instead of Crashman. I am running a Radeon 7500 All In Wonder. The Graphics board is ok, but I do have problems with the AIW installs with WIN98. I've done two installs. I think my problem was I did some driver upgrades. I think I will try again without the driver upgrades.

I have no info about the timings as I never looked there.

I did learn on another thread about a <Control> <F1> key combo to get access to some Bios commands.

Every working computer must be improved .... or replaced ...
July 25, 2002 9:01:34 PM

Hi Jeff and TWC,
No, crash is right - about memory.....if you have ddr266 memory, and use 133fsb on your motherboard, setting 2.0 in BIOS must be used for memory: 133(fsb) x 2(multiplier) = 266 mHz Memory speed.

Or, for the same memory, but 100 fsb, use the 2.66 multiplier, thus 100(fsb) X 2.66 = 266 Memory speed.

100fsb = 400 Quad Pumped
133fsb = 533 Quad Pumped

fsb = front side bus

Hope this helps a bit

Best regards,
MrBean
South Africa
September 17, 2002 2:48:34 AM

Just out of curiousity. I looked at 512 PC3200 and found a new to me PC3500. IF err when I upgrade the CPU to 533 as discussed in this thread, should I consider the PC3500 over the PC3200? Will it work on this MB?

Thanks in advance
Jeff

Every working computer must be improved .... or replaced ...
a b V Motherboard
a b à CPUs
September 17, 2002 3:21:29 AM

Of course all memory is compatable to slower standards, this "PC3500" might be higher quality PC3200. But then again, maybe not. PC3200 is already overclocked PC2700. So it's probably just more of the usual "must be run at non-stadard voltage" crap.

<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>
September 17, 2002 9:02:13 PM

Given that memory is slower than some of the faster CPUs, where is the optimum "break even" CPU speed vs DDR speed maxed out?

Crashman said:
... it's probably just more of the usual "must be run at non-stadard voltage" crap.

I missed that. Does the memory other than PC2100 need special settings that the motherboard will not do itself?

Every working computer must be improved .... or replaced ...
a b V Motherboard
a b à CPUs
September 17, 2002 9:42:28 PM

DDR400 (PC3200) is optimal for Intel's QDR400 bus. DDR533 is not available. You still get a slight performance increase with Intel's QDR533 bus even when constrained to DDR400 memory.

OK, PC2100 and PC2700 are both available at stock voltage. Some PC3200 needs higher than standard voltage to run that speed, in essance it's overclocked PC2700. Higher quality PC3200 will run at stock voltage.

<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>
September 18, 2002 11:49:17 PM

Given that memory performance limitation, how fast would you go for a CPU?
At some point, a "faster than X" CPU 533 will be waiting on the memory so much that a "faster than X CPU" will not pay in performance.

Which of these come close to equaling "X" assuming no OC.
533MHz system bus: 2.80 GHz, 2.66 GHz, 2.53 GHz, 2.40B GHz, 2.26 GHz

That's the "break even" I now desire to know.

Thanks again for your help.


Every working computer must be improved .... or replaced ...
a b V Motherboard
a b à CPUs
September 19, 2002 2:38:33 AM

Given current pricing, probably the 2.53. Of course if you overclock, probably still the 1.8A.

<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>
December 22, 2002 10:11:17 AM

The 7500 AIW video card cleaned up it's act with new drivers taken from the 8500DV CDROM.

Every working computer must be improved .... or replaced ...
December 22, 2002 11:09:21 AM

I swapped out the 1.8a P4 100 replacing it with the P4 2.4 533 and chaning my PC 2100 Infineons -7 for 3 Samsung 333B PC2700. I set voltage at 1.525 for the CPU. FSB is now set at 150. Problem is the multiplier is locked no greater than 2.0 When planted the 533 CPU, the 2.5 option went away. So memory is only doing 300.

Given the above and the SisSoft Sandra below, what would you comservatively go for? The CPU Floating Point Processor is at 100 percent 24/7 as I run a program similar to SETI at WWW.UD.COM.

Logical/Chipset Memory Banks
Bank 0 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Bank 2 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Bank 3 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Speed : 2x 150MHz (300MHz data rate)
Multiplier : 1/1x
Refresh Rate : 7.80µs
Power Down Mode : No
Fixed Hole Present : No

Memory Modules
Memory Module 1 : Samsung M3 68L3223DTM-CB3 0910BBE7 256MB 8x(32Mx8) DDR-SDRAM PC2700U-2533-700 (CL2.5 upto 167MHz) (CL2 upto 133MHz)
Memory Module 2 : Samsung M3 68L3223DTM-CB3 090BBD12 256MB 8x(32Mx8) DDR-SDRAM PC2700U-2533-700 (CL2.5 upto 167MHz) (CL2 upto 133MHz)
Memory Module 3 : Samsung M3 68L3223DTM-CB3 0809A196 256MB 8x(32Mx8) DDR-SDRAM PC2700U-2533-700 (CL2.5 upto 167MHz) (CL2 upto 133MHz)

Another option under consideration is moving the 2.4 to a Gigabyte GA8-PE667 Ultra board. Then either sell the 1.8a or drop it back in this board given the possibilities even with the PC2100 Infineon ending -7 CL2 up to 133 CL2.5 up to 143. .... Or leave the Samsung TCB3s in it. I got lucky recently. I have picked up some PC2700 in PC2100 packages at a decent price.

Every working computer must be improved .... or replaced ...
December 23, 2002 12:23:58 PM

Now testing the P4 2.4 533 at 160 FSB resultung in 2.9 gig initially seems stable.
PC 2100 Memory is at 2 x 160=320. When set to 333. it seemed unstable, so I backed it off a bit.

Every working computer must be improved .... or replaced ...
January 21, 2003 9:32:52 PM

Update - I've pulled the P4 2.4 533 off this board to move it to a <A HREF="http://www.giga-byte.com/products/8pe667ultra.htm" target="_new"> GigaByte GA8-PE667 Ultra Rev 1.0</A> where it can run with some functional DDR333B / PC2700 memory and not be so memory multiplier capped. With a CPU operating at 533, the 2.5 memory multiplier disappears.
I replaced the P4 1.8 100 back into this board. I'm placed the stock 2.4a fan on the P4 1.8 100 with some Artic Silver III. I'm debating finding an aftermarket fan as it is the stock fan is rarely rising above 2519 rpm. I'm wondering if I cleaned the CPU chip properly previously. I seem to recall the stock fan for the 1.8a rising to about 3333 RPM when I had the P4 1.8a 100 CPU really running full bore. Since the stock fan for the P4 2.4 533 is 0.18 amp, I thought it might offer a tad more cooling than the stock fan for the P4 1.8a at 0.16 amp. That does not seem to be the case.
The P4 1.8a 100 is overclocked to 2.25 which pushes the memory to DDR333 speeds with a DDR multiplier of 2.5. I'm running it with one double sided 512 MB stick of Infinenon -7 chips and two sticks of Samsung 333B 256 MB -TCB3 single sided chips at CL2.5. Total mem is 1 gig.
I'm running stock voltages on a 450 watt PSU and 11 fans. The case is designed so they are not very noisy.

Every working computer must be improved .... or replaced ...

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January 21, 2003 11:34:51 PM

True System has P4 1.8a overclocked by 1.25=2.25 CPU Speed.

SiSoftware Sandra Reports:

System Mainboard
Manufacturer : Gigabyte Technology Co., Ltd.
MP Support : 1 CPU(s)
MPS Version : 1.40
Model : 8IEXP
Version : 1.x
BIOS ID : 06/21/2002-I845E-6A69VG0ZC-00
Chipset : Intel 845/D/E/G/GL (Brookdale) Chipset

System Memory Controller
Location : Mainboard
Error Correction Capability : None
Number of Memory Slots : 3
Maximum Installable Memory : 3GB
Bank0/1 - A0 : None None None None DIMM 512MB/64
Bank2/3 - A1 : None None None None DIMM 512MB/64
Bank4/5 - A2 : Empty

System Chipset
Model : Intel Corporation 82845/E/MP/MZ Brookdale CPU to I/O Bridge
Bus(es) : ISA AGP PCI IMB USB FireWire/1394 SMBus/i2c
Front Side Bus Speed : 4x 125MHz (500MHz data rate)
Max FSB Speed / Max Memory Speed : 4x 133MHz / 2x 133MHz
In Order Queue Depth : 12 req(s)

Chipset Hub Interface
Type : HubInterface
Version : 1.50
No. Ports : 1
Width : 8-bit
Full Duplex : Yes
Multiplier : 1x

APIC 1
Version : 2.00
Multiplier : 1/2x
Max Interrupts : 24
IRQ Handler Engaged : Yes
Enhanced Support : No

Logical/Chipset Memory Banks
Bank 0 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Bank 1 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Bank 2 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Bank 3 Setting : 256MB DDR-SDRAM 8-1-1-1R 6-1-1-1W 2.5-3-3CL
Speed : 2x 166MHz (332MHz data rate)
Multiplier : 1.33x
Refresh Rate : 7.80µs
Power Down Mode : No
Fixed Hole Present : No

Memory Modules
Memory Module 1 : AMD 512MB 16x(32Mx8) DDR-SDRAM PC2100U-233-750 (CL2.5 upto 143MHz) (CL2 upto 133MHz)
Memory Module 2 : Samsung M3 68L3223DTM-CB3 090BBD12 256MB 8x(32Mx8) DDR-SDRAM PC2700U-2533-700 (CL2.5 upto 167MHz) (CL2 upto 133MHz)
Memory Module 3 : Samsung M3 68L3223DTM-CB3 0809A196 256MB 8x(32Mx8) DDR-SDRAM PC2700U-2533-700 (CL2.5 upto 167MHz) (CL2 upto 133MHz)

Environment Monitor 1
Model : ITE IT8705/12 ISA
Mainboard Specific Support : No

Temperature Sensor(s)
Board Temperature : 25.0°C / 77.0°F
CPU Temperature : 25.0°C / 77.0°F
Power / Aux Temperature : 57.0°C / 134.6°F td

Cooling Device(s)
Auto Fan Speed Control : No
CPU Fan Speed : 2482rpm

Voltage Sensor(s)
CPU Core Voltage : 1.42V
Aux Voltage : 1.78V
+3.3V Voltage : 3.23V
+5V Voltage : 5.16V
+12V Voltage : 11.54V
-12V Voltage : -9.40V
-5V Voltage : -1.89V
+5V Standby Voltage : 4.97V
Battery Voltage : 3.28V

AGP Bus
Version : 2.00
Current Data Transfer Rate : 4x
Side Band Enabled : Yes
Fast-Writes Enabled : No
Fast-Writes Support : Yes
Aperture Size : 128MB

PCI Bus(es)
Version : 2.20
No Bridges : 2
PCI Bus 0 : 32-bit PCI (1x PCIClk)
PCI Bus 2 : 32-bit PCI (1x PCIClk)

LPC Hub Controller 1
Model : Intel Corporation 82801DB (ICH4) LPC Interface Bridge
ACPI PM Enabled : Yes
Random Number Generator Enabled : No
Random Number Generator Support : Yes

USB Controller 1
Model : Intel Corporation 82801DB (ICH4) USB UHCI Controller #1
Version : 1.10
UHCI Interface : Yes
Channels : 2
Speed : 48MHz
Legacy Emulation Enabled : No

USB Controller 2
Model : Intel Corporation 82801DB (ICH4) USB UHCI Controller #2
Version : 1.10
UHCI Interface : Yes
Channels : 2
Speed : 48MHz
Legacy Emulation Enabled : No

USB Controller 3
Model : Intel Corporation 82801DB (ICH4) USB UHCI Controller #3
Version : 1.10
UHCI Interface : Yes
Channels : 2
Speed : 48MHz
Legacy Emulation Enabled : No

USB Controller 4
Model : Intel Corporation 82801DB (ICH4) USB EHCI Controller
Version : 2.00
Spec : 1.00
EHCI Interface : Yes
Channels : 6
Legacy Emulation Enabled : No

FireWire/1394 Controller 1
Model : VIA Technologies Inc VT6306 VIA Fire II IEEE-1394 OHCI Link Layer Controller
Version : 1.00
OHCI Interface : Yes
Enhanced 1394a Support : No
Channels : 64
Speed : 400MHz

System SMBus Controller 1
Model : Intel 801xx SMBus
Version : 0.01
Speed : 16kHz

Expansion Slot(s)
PCI : PCI 32-bit 5V FullLength Available
PCI (1h) : PCI 32-bit 5V FullLength Available (Intel Corporation 82845/E/MP/MZ Brookdale CPU to AGP Bridge)
PCI (2h) : PCI 32-bit 5V FullLength InUse
PCI (3h) : PCI 32-bit 5V FullLength Available
PCI (4h) : PCI 32-bit 5V FullLength Available
PCI (5h) : PCI 32-bit 5V FullLength Available
AGP (8h) : AGP 32-bit 5V FullLength InUse (ATI Technologies Radeon VE QY)

Port Connector(s)
PRIMARY IDE : None - ATA / None
SECONDARY IDE : None - ATA / None
FDD : 8251 FIFO Compatible - Floppy / None
COM1 : Serial Port 16450 Compatible - 9 Pin Dual Inline / DB-9 pin male
COM2 : Serial Port 16450 Compatible - 9 Pin Dual Inline / DB-9 pin male
LPT1 : Parallel Port ECP/EPP - DB25 pin female / DB25 pin female
Keyboard : Keyboard Port - None / PS/2
PS/2 Mouse - Detected : Mouse Port - PS/2 / PS/2
USB : USB - None / None
USB : USB - None / None

Performance Tips
Notice N224 : SMBIOS/DMI information may be inaccurate.
Warning W2523 : Memory bus speed exceeds memory rated speed. Reduce memory bus speed.
Warning W2542 : Memory bus speed exceeds Chipset rated speed. Reduce FSB/memory multiplier.

Every working computer must be improved .... or replaced ...

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