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2x 9800 GTX+ in SLI, one is 300Mhz...

Last response: in Graphics & Displays
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February 25, 2011 4:44:35 AM

Hello, I've got two 9800GTX+ cards in SLI and CPU-Z is saying one is at 738 Mhz, while the other is at 300 Mhz - my mobo is an Asus P7P44D-E PRO.

When I enable SLI both cards say 300 Mhz.

Anyone have experience with this problem? I tried googling but all that it retuns is people asking if SLI works with cards with different clock speeds ;(

More about : 9800 gtx sli 300mhz

February 25, 2011 5:55:11 AM

I tried moving the SLI bridge to the other position - still both reporting 300 Mhz in CPU-Z.

Do they speed up while in game or something?
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a b à CPUs
February 25, 2011 1:43:40 PM

By CPUz I assume you mean GPUz. What you should do is get a free copy of Furmark, and run it in windowed mode so you can see what happens when the benchmark is running.
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February 25, 2011 2:03:54 PM

Was using CPU-Z.

GPU-Z says 738Mhz for both - will check out furmark.
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a b à CPUs
February 25, 2011 2:08:26 PM

:)  - Sounds like you are fine! CPUz will show the current clock of your CPU, and a lot of CPUz clock themselves down when idle to save power. As soon as you load the CPU with some work to do it will clock back up to the proper speed. Graphics cards do the same.
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February 25, 2011 2:32:44 PM

Just ran Furmark.

No SLI both cards are @ 738 Mhz and I get 12 FPS after 1000 frames.

With SLI cpu 1 @ 300 Mhz, cpu 2 @ 738 Mhz and I get 12 FPS after 1000 frames.
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a b à CPUs
February 25, 2011 3:33:26 PM

Hmmm. Okay. What kind of Processor do you have in your Computer?

Im not sure Furmark was the best tool to use, I think you should try using the 3dMark Vantage (free version). I would expect you to get a score of around 5000-6000 with one card.

With 2 cards you should hopefully get atleast 11000.

If you achieve 11000 on 3dMark Vantage then your SLI is working fine :) 
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February 25, 2011 3:41:30 PM

CPU is Intel Core i5-650 @ 3.792 Ghz (OC)

My power supply is only 550w

Will check out that benching tool you suggested.
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a c 125 U Graphics card
a b à CPUs
February 25, 2011 4:36:12 PM

I don't think SLI/CF will work with windowed mode.

Also if you're only getting 12 FPS you're doing something wrong lol. Maybe "extreme burn test?" Just do a normal run, at most 4xAA.
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February 25, 2011 4:46:02 PM

It's fullscreen - just doing normal runs, dynamic background with no AA.

12 FPS average.
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a c 125 U Graphics card
a b à CPUs
February 25, 2011 4:53:51 PM

At 1080p, single 5850, I average 72 FPS so something is wrong there. I mean you should be at least... 50? Not sure but definitely not 12.

Give Vantage a try and see what happens.
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February 25, 2011 5:00:58 PM

============================
Furmark 1080 preset
============================
SCORE:726 points (12 FPS, 60000 ms)
Max GPU Temp: 58°C
Resolution: 1920x1080 (FS) - AA:0 samples
FPS: min:13, max:14, avg:12 - OPTIONS: DynBkg
NVIDIA GeForce 9800 GTX+ (10DE-0613, 2 GPUs)
8.17.12.6658 (1-7-2011) - nvoglv64
core:738MHz, mem:1100MHz, shader:1836MHz
Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz
Cpu Speed 4333 MHz / System Mem 8189 MB
Windows Vista 64-bit build 6002 [Service Pack 2]

Running 3D mark...
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a c 595 U Graphics card
a b Ĉ ASUS
a b à CPUs
February 25, 2011 5:26:01 PM

Is a 550 watt power supply enough to power two 9800 GTX+ cards on that system?
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a c 125 U Graphics card
a b à CPUs
February 25, 2011 5:43:21 PM

Vantage score seems right on the money. I don't know why Furmark is being dumb.

At this point I'd say just go boot up some games and try with SLI on and off and see what happens. It should be noticeably different at max settings if you have Crysis or Metro 2033.
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February 25, 2011 5:51:44 PM

Ran 3D Mark with SLI disabled - edited info into last post.
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February 25, 2011 6:38:34 PM

most likely that 550watt not pushing enough power, did you check the amperage on the 12v rail on your psu to see if it matches what the cards say?
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February 25, 2011 6:56:52 PM

How do I do it? I'm a nub.

It's an old random power supply from 2006.
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February 25, 2011 6:59:30 PM

give me the company and model number and will tell you, to find this you will to get into the computer and look for your psu, their should some description written on it.
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February 25, 2011 7:07:22 PM

Heading out to buy a new PSU right now actually... I'll let you know if the benches change.
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February 26, 2011 12:54:00 AM

Still getting low furmarks and stuff.

750w Strider Gold Power Supply
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February 26, 2011 1:38:16 AM

updated mobo bios - still getting low benchmarks.
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February 26, 2011 6:21:54 PM

Best answer selected by threeboy.
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a c 271 U Graphics card
a b Ĉ ASUS
a b à CPUs
February 26, 2011 6:25:16 PM

This topic has been closed by Mousemonkey
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