Conroe Buying Guide: Feeding the Monster
by Gary Key & Wesley Fink on July 19, 2006 6:20 AM EST- Posted in
- Motherboards
Test Setup
Test conditions were maintained the same, as much as possible, over the platforms tested. For better comparison standard test results (1280x1024) were run with a single NVIDIA 7900GTX on all platforms. A single ATI X1900XTX was also tested at standard resolutions on the Intel 975X boards which support CrossFire. Consider this result a sanity check for single card performance and CrossFire. It should not be directly compared to other test results. Since SLI and CrossFire are not yet interchangeable, 1600x1200 4xAA/8xAF SLI was run on the single NVIDIA-based board with a pair of 7900GTX cards. 1600X1200 4xAA/8xAF CrossFire was run on the Intel 975X boards using a Master+Standard X1900XT CrossFire setup. All results are reported in our charts and color-coded for easier identification of results.
All Core 2 Duo benchmarking used Corsair PC2-8500 (DDR2-1066) 2GB kit at 3-3-3 timings at 2.2V. In recent months the memory market has moved from a 1GB kit to a 2GB kit being the common memory configuration. Our new DDR2 test standard is 2GB.
| Performance Test Configuration | |
| Processor | Intel Core 2 Duo E6700 (X2, 2.67GHz, 4MB Unified Cache) |
| RAM | 2 x 1GB Corsair Twin2X2048-8500C5 Tested at DDR2-800 3-3-3 2.2V |
| Hard Drive(s) | Hitachi 250GB SATA2 enabled (16MB Buffer) |
| System Platform Drivers | Intel - 8.0.1.1002 NVIDIA - 6.86 |
| Video Cards: | 1 x EVGA 7900GTX - All Standard Tests 2 x EVGA 7900GTX - SLI on NVIDIA 1 x ATI X1900XTX - ATI Standard Tests on Intel 2 x ATI X1900XT (Master+Standard) - CrossFire on Intel |
| Video Drivers: | NVIDIA 91.31 ATI Catalyst 6.6 |
| CPU Cooling: | Tuniq Tower 120 |
| Power Supply: | OCZ GameXstream 700W |
| Motherboards: | ASUS P5W-DH Deluxe (Intel 975X) Intel 975XBX (Intel 975X) ASUS P5B Deluxe (Intel P965) ASUS P5N32-SLI (nF4 SLIX16 Intel) Biostar TForce P965 Deluxe (Intel P965) Gigabyte GA-965P-DQ6 (Intel P965) DFI Infinity 975X/G (Intel 975X) ASRock 775Dual-VSTA (VIA PT880 PRO) |
| Operating System(s): | Windows XP Professional SP2 |
Test conditions were maintained the same, as much as possible, over the platforms tested. For better comparison standard test results (1280x1024) were run with a single NVIDIA 7900GTX on all platforms. A single ATI X1900XTX was also tested at standard resolutions on the Intel 975X boards which support CrossFire. Consider this result a sanity check for single card performance and CrossFire. It should not be directly compared to other test results. Since SLI and CrossFire are not yet interchangeable, 1600x1200 4xAA/8xAF SLI was run on the single NVIDIA-based board with a pair of 7900GTX cards. 1600X1200 4xAA/8xAF CrossFire was run on the Intel 975X boards using a Master+Standard X1900XT CrossFire setup. All results are reported in our charts and color-coded for easier identification of results.
All Core 2 Duo benchmarking used Corsair PC2-8500 (DDR2-1066) 2GB kit at 3-3-3 timings at 2.2V. In recent months the memory market has moved from a 1GB kit to a 2GB kit being the common memory configuration. Our new DDR2 test standard is 2GB.
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Vidmar - Wednesday, July 19, 2006 - link
One thing that really bugs me about some of the MB manufactures is that some never state the exact number of PCIe lanes that are actually available on that second PCIe 16x slot. Some do some don’t. Some state it while in SLI/Crossfire mode but not when in non- SLI/Crossfire mode.Right now I’ve got an nForce 4 SLI board that has two PCIe 16x slots, but when in non-SLI mode they are at 16x and 2x respectively. When in SLI mode they are both at 8x respectively.
The problem with this is that (at least on this board) you cannot install anything but a video card in the second PCIe 16x slot when in SLI mode.
I’ve got an PCIe 8x SCSI raid card (LSI 320-2e) that I’m trying to use in the second PCIe slot at 8x, but this board won’t even acknowledge that its there while in SLI mode. And when running in non-SLI it only runs at 2x and becomes a bottleneck for this workstation.
So if its possible to provide some details as to what exactly a board can do on the second PCIe 16x slot in both normal and SLI/Crossfire mode, that would be most helpful!
For example on the ASUS P5W-DH Deluxe in your review it doesn’t state this information either way. But on the Intel 975XBX you do have that information.
So what does the second PCIe slot run at in non-Crossfire mode on the ASUS P5W-DH Deluxe?
Also do you happen to have a SCSI PCIe card you can test in the second slot (or any PCIe card for that matter) and see if the BIOS can recognize the card while in SLI/Crossfire mode? That too would be helpful for people who don’t care about multiple GPUs, but want to create large array workstations.
Thanks!
PS: nice article.
supremelaw - Thursday, July 20, 2006 - link
Excellent points! Constant change is here to stay :)On our ASUS P5WD2 Premium with i955X chipset,
we are now faced with that very same problem:
we don't need 2 video cards, because we do
mostly database development. And, we want
to dedicate the second "universal" x16 slot
to a high-performance PCI-E RAID controller.
(Santa Claus is going to bring me an x1900
PCI-E video card anyway, and that should
easily last me for another 20 years, min!)
Our consultant highly recommends the Areca model,
but it only performs best in x8 mode. On the
other hand, our ASUS User Manual states that
the second "universal" x16 slot can only run
in x4 mode, maximum.
That limitation was a single line of text
in that User Manual, but it is not mentioned
in any of the other specs for our motherboard.
His recommendation: switch to a server motherboard,
so we can use the Areca RAID 6 controller (not a bad
idea, actually).
So, I think we'll have to settle for the Promise
PCI-E model EX8350, which is also limited to x4 mode,
but it now supports RAID 6 too.
It only took about 4 hours of research to confirm
this limitation, however :)
Such specs should be better documented, for sure!
Sincerely yours,
/s/ Paul Andrew Mitchell
Webmaster, Supreme Law Library
http://www.supremelaw.org/">http://www.supremelaw.org/
Missing Ghost - Wednesday, July 19, 2006 - link
I find it weird that the pcie card does not work in 8x mode. I see no reason why it wouldn't work...the sli pcb that you flip around only redirects the lanes AFAIK.vhx - Wednesday, July 19, 2006 - link
Too bad the motherboards cost more than a decent Conroe processor. Kind of sad to see the features lacking until you get into the $250 price ranges. You can spot an AMD AM2 motherboard with the same features for around $130ish, which makes this 975X chipset rediculously expensive compared to the newer AM2's. The TForce P965 looks like a great alternative for the price, although based on the 965P. Hmm upgrading to Conroe will be more expensive than I thought.... /sigh. What to do.Gary Key - Wednesday, July 19, 2006 - link
Wait, that is right, wait until the motherboard suppliers are in full production in August. There will be a large variety of motherboards available by the end of August that will make up the $50~$150 range with chipsets from the 945P to nF570SLI being sold. We will also start seeing the G965 boards in late August for those that want a mATX form factor, decent graphics,and the ability to upgrade later. If you need a board now, it will cost you. ;-)
JarredWalton - Wednesday, July 19, 2006 - link
Not to mention getting the Core 2 CPUs. :) I would expect prices to drop significantly within a month or so.
jonp - Saturday, July 22, 2006 - link
Jarred,Please say more about your comment on pricing.
http://www.dailytech.com/article.aspx?newsid=3377">http://www.dailytech.com/article.aspx?newsid=3377
says:
Thanks, Jon
multiblitz2 - Wednesday, July 19, 2006 - link
I was waiting for the 965 as HDMI/HDCP-support is a must have for my new HTPC. Does 975 support this in the same way as the 965 ?araczynski - Wednesday, July 19, 2006 - link
great article!looking forward to additional mobo's appearing (and more importantly - prices dropping) beforei build my next rig.
i personally refuse to pay over $150 for ANY mobo, no matter the features. but i do realize that the initial price gouging is to milk the early adopters. i figure by early october prices should be just right for all the nice toys.
araczynski - Wednesday, July 19, 2006 - link
i know this is a dead horse, by why in the world can't these manufacturers make models that throw out some of these legacy 'extras' they keep putting on the boards?onboard sound, parallel ports, floppy connectors, etc...