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Problems with a Pentium D 805

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picboy   11-09-2006 at 03:14:04 AM

Hello everybody. This is my first post. I'm from Venezuela.

I just bought a Pentium D 805 thinking that I was going to be able to overclock it a little (3.33 GHz) to test my abilities...

The problem is that I intendended to do it without buying any additional cooling and buying only crappy components... this is what I got:

- CPU: Pentium D 805 2.66 GHz Retail
- Motherboard: Foxconn P4M800P7MA-RS2 (Chipset VIA P4M800 Pro+8237R)
- Memory: Blitz ('barely value') DDR2 533 MHz
- Case: X Tech 600 W power supply. No fans in case.

Besides that, there is another concern. I live in a small town where the average temperature is 34-38 ºC (I'm not kidding, it's hot like hell) and my computer is in the living room, where there is almost no ventilation, no fans and no air conditioning.

Once I installed the PC... I started to try to install Windows XP... but the damn computer froze everytime because of the massive heat built in the CPU (I didn't even try to overclock it). So I had to wait 'till the sun went down and the room temperature got to 30ºC and opened the case and put a 250mm mini-fan to blow some air into the case...

After that, I installed Win XP and flashed the BIOS with the most recent version... but then I installed Doom 3 and run a 'timedemo demo1' to see how many FPS it gaind over my old system (Sempron 64 2800+ 1.6 GHz)... The result were HOOOOORRIBLE! The new system was actually SLOWER!

Both system were tested with an EVGA GeForce 5500 256 MB AGP 8X and both used 512 MB of RAM (Sempron's was DDR 333 MHz) and both mobo were based on VIA's crappy chipset (Sempron's was K8M800/VT8237R+) and both were Micro ATX formfactor.

The test was using Doom 3 V1.0.1262. Medium Quality. 640x480 and default advanced settings.

This were the results:

Sempron 64 2800+: 29.9 FPS
Pentium D 805: 29 FPS

I ran the test SEVERAL times and rebooting several times and the results were ALWAYS the same (the first run always gave around 2 FPS less on both system).

Then I tried to overclock. But saw no difference at all. With the help of CPU-Z and RightMark CPU Clock Utility I realized that the system didn't overclock at all. The 'SuperStep' Utility from Foxconn also doesn't work. It claims to change the FSB on the run but any change on it and the PC freezes instantly.

Later, I ran the test in Window mode and saw with the RightMark Utility that when the 'timedemo demo1' was running the CPU temp goes from 50-55 ºC to a whopping 64ºC-69ºC. The multiplier (FID) also goes from 20 to 14 and the CPU clock/throttle from 2.66 GHz to only 1.86 GHz. Neither core gets even more than 70% use. The CPU Fan cooler works from 1400 RPM to 1900 RPM.



Now, the questions is. Is this normal? What should I do? Keep in mind that I don't want to spend

more than 50$ to fix this problem...

Thanks everybody!

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almerac   11-09-2006 at 10:55:19 AM
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well. first off i can tell you. that what you saw was to be expected. doom3 does not take advantage of dual cores. so you really shouldn't have seen much of a difference between an 805 and a sempron. when you overclock you will probably see a bit more difference. but using a 5500 :? with something like a 3.5 ghz 805, will leave you bottlenecked at the video card.

first off, its really hot where you live. so first off you WILL need to buy a decent after market cooler, look around and try to find the best one for your socket type, arctic cooling makes some great $30 fans that are a steal.

secondly. your just going to have to get a better video card then a 5500. the FX (5xxx) series from nvidia already ran way hotter then they should have, and were relatively poor performers.

because of your climate you will want one that runs cool so it doesn't have problems where you live either. if your looking for good cheap ones 7300GTs are a good deal, as well as 7600Gs's and x1600pros and x1650 pros.

im sry to say tho, unless you hook up some serious water cooling to it, or some phase change, or a peltier, or anything that will be able to get it close to or lower then ambient, your not going to see much of an overclock at all.

the basic problem is that as the temperature of a medium conducting electricity rises its resistance to electrical flow rises as well (just as a rule of thumb), and vice versa. so your computer is running so hot, that it cannot run stably because the electrical resistance is increased by being hot, and at its current voltage cannot complete operations dependably because the flow is impeded.

what you could do is over volt your processor a little (to overcome the greater resistance), but that would create alot more heat, and even more resistance (hence why good cooling is so important in overclocking). this process usually ends (if the heat is not controlled) badly. to much voltage to get stability and to much heat from the overclock. result is a processor that literally burns itself. this is if you do not have proper cooling.

there are some peltiers in the range of $100 that would likely solve your problem... i cannot say for certain. you may find some self contained water cooling units around that price too. either way, you will need serious cooling to overclock. do you have central AC? or any way to cool your house down.

with $50 you should be able to get a cooler that will allow you to run stably in the daytime. but don't count on it allowing you to overclock.

Reply to almerac
dlmacline   11-10-2006 at 12:13:00 PM
- 0 +

Well I dont know much but I use the same Processor model like yours..

I think its just the heat that is slowing you down.. you said your area is hot like hell.. so I think this may have caused more heat problems to an already unstable processor model in PD 805

And I think this processor isn't that much of a bang for gaming... my brother said he would do better in Athlon single core 3000 than the PD 805 only if his interest are just gaming.. naturally, a lot of PC users I think close other programs when they are about to open gaming applications

So..I think too much heat is the problem because I experience it sometimes too.. and if not you might want to check your bios

Reply to dlmacline
rob_jeffers   11-11-2006 at 01:22:10 PM
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I completely understand. I bought a 805d as part of a complete new system, ran a few games with it on stock, and only getting bout 30 fps on bf2. I have a 512mb x1900 xt and 2gb 667mhz ddr2 dc ram. Somehow doesnt add up. I then began to overclock it, but only managed to about 2.8 becuase my Asrock board wouldnt let me change vcore. So off to the shop to buy the 965p-ds3. Even overclocked it to 3.8ghz once, but i put it back becuase idle heat was just a joke and as soon as i ran a demanding application, it would just cut out. But even still at 3.4ghz (completely stable, only 45c) my fps are still only about 40fps. Still doesnt add up.

As no one seems to know what the problem is, i am going off to shop in a couple of hours to invest in an E6400 and if i still experience problems with that, then next month pay i will invest in some better ram, and deciding how much it cost i might sell my old sticks off. But i will try to sell my old mobo and cpu, plus a couple of routers i have.

But if i replace ram and cpu and mobo and it still performs shit, then i think i will just cry and then i will have to buy a new graphics card.

I will let you know how my e6400 goes and then we can determaine if the 805d is a turdy processor.

Reply to rob_jeffers
almerac   11-13-2006 at 05:08:42 AM
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ive heard alot of 805's aren't what people expected. i guess you just have to remember, that its basically 2 Pentium 4 cores slapped on one die. so any heat issues, are that much more problematic, on top of the fact that the slower Pentium 4's couldn't beat Pentium 3's clock for clock, and even later, the only real advantage they had on them was higher clock rates, not much higher IPC's. (anyone remember that? a Pentium 3 1.4ghz beating a 1.6 ghz Pentium 4), that and so few games really take advantage of dual cores.

Reply to almerac
tool_462   11-13-2006 at 05:46:48 AM
- 0 +

If your case has no ventilation you shouldn't expect the stock cooler to wrangle the heat of a D805 @ 30C ambient. You are going to need a very well ventilated case and a decent air cooler to keep temps in line with crazy hot ambient like that.

Reply to tool_462
rob_jeffers   11-18-2006 at 01:01:12 AM
- 0 +

I have my e6400 and have been using it over the last week, It is definately improved my gaming performance, i was getting bout 40fps on BF 2142 with my 805d now im getting about 90. Plus my 805d was overclocked to 3.8ghz at one point and it was still turdy.

Reply to rob_jeffers
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