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AMD X2 3800 Vs Pentium D 805

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Afrodziac

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Discussion starter · #1 ·
Which do u think will make a better gaming CPU. both can be overclocked to sick speeds. perfect example is this review where the 805 oc'd to 4.1ghz and beat the AMD FX-60 and the $1100 Pentium EE 965 even though its has a 533mhz FSB and AMD uses 2000mhz HTT with on dye memory conrtoller.

http://www.tomshardware.com/2006/05/10/dual_41_ghz_cores

The X2 3800 is also a great overclocker and has been known to beat the x2 4800+ but the price differnce is big.

x2 3800-$295 ( faster than an x2 4800+ when oc'd)
Pentium D 805-$130 (Faster than Fx-60 and Pentium EE 965 when oc'd)

Not talking about price of ddr2 or anything else, because I actually have two brand new sticks of DD2 667 memory. as well as 2 gigs of pc3200. but as far as the CPU vs CPU which do u think is a better gaming CPU?
 
#2 ·
That link is a 404. :(

From experience: The 3800 X2 is incredibly quick. I can't wait until I assemble the rest of the parts onto it and use it full time instead of this piece of crap I have right now. I've not used it for gaming yet, but get back to me next month when I've added a 7900 GT to it.
 
#4 ·
http://tomshardware.co.uk/2006/05/10/dual_41_ghz_cores_uk/

thats the link he meant, missed the uk bit off :p

and that article is about overclocking the crap out of the 805, so unless you plan on overclocking it (which is always riskey, especially if you dont know what you are doing) then it is much much slower than the X2

not to mention the overclock is flawed, in the way that the FSB is only running at 210 which is much higher than a normal DDR400 system, the whole thing is basically multiplier overclocked, but take my chip for example, itll run a lot faster at 10x280 than 14x200
 
Discussion starter · #5 · (Edited)
I plan on overclocking either CPU, I have a watercooling system ready to go.
I also have 2 gigs of pc3200 and ddr2 667 memory ready to go. so its just down to these cpu's I am a big AMD fan but I can't ignore these two things:

(a) the 805 is less than half the price of the x2 3800
(b) when oc'ed the 805 beats the fx-60 in gaming. an oc'ed x2 3800 wont.

Thats $1000 cpu performance for Just over $100 bucks. But the decision is not simple because I still have reservations for some reason.
 
#6 ·
refraction said:
http://tomshardware.co.uk/2006/05/10/dual_41_ghz_cores_uk/

thats the link he meant, missed the uk bit off :p

and that article is about overclocking the crap out of the 805, so unless you plan on overclocking it (which is always riskey, especially if you dont know what you are doing) then it is much much slower than the X2

not to mention the overclock is flawed, in the way that the FSB is only running at 210 which is much higher than a normal DDR400 system, the whole thing is basically multiplier overclocked, but take my chip for example, itll run a lot faster at 10x280 than 14x200
Click to expand...
Refraction no way iam gona buy my frends pc amd 3400+ haha with this info iam gona make a 4.0 ghz intel pentium D
 
#7 ·
well if you feel confident doing it go for it :)

Id be lying if i said i wouldnt try this myself, but alas i dont have any more P4 gear, so all in all itd cost me near on £250 or more, not < £100 like stated as id need basically a whole system to run along side my opteron 2.8 which im overly happy with atm :p
 
#8 · (Edited)
hmmm wonder what fps il get with FFX with a 4.1 ghz dual core proccesor in pcsx2 0.9 muahuahauhauh but il defently need a water cooling does anyone now a good water cooling because in toms guide they didnt say which water cooling they used

PS: lol when i put in my sig pcsx2 beta 1.0 link to steal souls i have now 195 stolen souls thx to pcsx2 i think many ppl want it haha
 
#10 ·
259 dollars :hdbash: :hdbash: isnt there a cheaper one 150 dollars and lower is ok but 259 is too much auch my mony

EDIT: ow wait the 259 is just the liquid kit the system kit kosts 350 dollars so thats makes it all together 609 dollars :hdbash: :hdbash: thats more than the computer that iam gona built
 
#11 · (Edited)
Qwin said:
259 dollars :hdbash: :hdbash: isnt there a cheaper one 150 dollars and lower is ok but 259 is too much auch my mony
Click to expand...
Well you can always make one yourself. There probably are cheaper ones out there, but it's a bit like a PSU really. Personally I'd go for the highest quality one I could find. Since I use Swiftech heatsinks and find them awesome, i recommend Swiftech's watercooling.

That's actually a lie. I used ThermalTake's BigWater set last year. Not recommended.

Qwin said:
ow wait the 259 is just the liquid kit the system kit kosts 350 dollars so thats makes it all together 609 dollars :hdbash: :hdbash: thats more than the computer that iam gona built
Click to expand...
Yes. Of course. All watercooling kits cost $610. It's a surprise that they're viable mainstream products at that cost.

IF YOU JUST WANT TO COOL THE CPU then just buy the Swiftech H20-220 Apex "Ultra" Watercooling Kit. It comes with everything you need for the CPU and can easily be upgraded if you want to add GPU Water Blocks or anything else. The other option you saw is the "Everything + Anything" option that throws in everything you'll ever need.
 
#12 ·
The hardware support for the AMD64 x2 is not all that hot right now. Probably the same story with the P-D, but I haven't done the research to back that up so I'll just say it's a hunch.

You'll find many power management issues with the x2 that effectively disable the smooth transition of a process from one CPU to another - the process just freezes. This has been a known issue at least since January (when I put my system together), and has not yet been resolved by AMD (though they have released a patch that they claim fixes it, which solves no problems).

For now, your best bet is to boot up with the /pmtimer boot option (set via msconfig).
 
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#13 ·
industrian said:
Well you can always make one yourself. There probably are cheaper ones out there, but it's a bit like a PSU really. Personally I'd go for the highest quality one I could find. Since I use Swiftech heatsinks and find them awesome, i recommend Swiftech's watercooling.

That's actually a lie. I used ThermalTake's BigWater set last year. Not recommended.



Yes. Of course. All watercooling kits cost $610. It's a surprise that they're viable mainstream products at that cost.

IF YOU JUST WANT TO COOL THE CPU then just buy the Swiftech H20-220 Apex "Ultra" Watercooling Kit. It comes with everything you need for the CPU and can easily be upgraded if you want to add GPU Water Blocks or anything else. The other option you saw is the "Everything + Anything" option that throws in everything you'll ever need.
Click to expand...
yup thats what i needed just the cpu thx industrian
 
#14 · (Edited)
Afrodziac said:
I am a big AMD fan but I can't ignore these two things:

(a) the 805 is less than half the price of the x2 3800
(b) when oc'ed the 805 beats the fx-60 in gaming. an oc'ed x2 3800 wont.
Click to expand...
I see it as a practically maxed out, watercooled, power-hungry Pentium D 805 @ 4.1GHz narrowly beats an FX-60 at stock on air-cooling in some questionable benches that favour Intel CPUs (such as Quake 3 Arena, and single digit victories in FEAR, a GPU-bound game). In UT2004 and most other games, the X2 would beat the P-D by an extremely large amount, same with Mozilla and WinRAR.

I no longer read Tom's since their choice of benchmarks is always skewed in favour of Intel, and every other site paints a completely different picture, such as Anandtech, Tech Report and [H].

Also, an overclocked X2 3800+ can exceed FX-60 performance on air cooling with a slight voltage bump and a 2.7GHz clock, but if you are serious about overclocking you would get an Opteron instead and OC to 2.8GHz+ very easily on air as refraction has done.
 
Discussion starter · #17 · (Edited)
#18 · (Edited)
This guy used a zalman fan to hit 4.2 ghz.
Click to expand...
He didn't say what temps he got, plus the source is very questionable (ebay auction - he is trying to sell the chip).

and in the article on tomshardware. they got to 3.8 on stock fan and HS. and zalmans are way more effcinent than stock hs+ fans. bottomline you can hit 4ghz+ on a good fan and HS.
Click to expand...
Below in the article, it says it throttles on the Zalman @ 4.0GHz, and watercooling is required:

http://tomshardware.co.uk/2006/05/10/dual_41_ghz_cores_uk/page24.html

Tom's said:
This is where the Zalman cooler begins to show signs of stress. In fact, its maximum fan rotation speed isn't enough to handle the terrific levels of heat produced; the CPU gets too hot, and begins to throttle back its speed.
Click to expand...
... and 3.8GHz on stock cooling is not true, since a Zalman was used.

With decent aftermarket aircooling you can have it semi-stable at 3.8GHz with a voltage increase, while my X2 3800+ or similar Opteron would outperform it easily in the majority of benchmarks, and have much lower temps on stock volts.

If you look at the charts, the P-D @ 3.8GHz is often at the bottom. This is because it is throttling. Meanwhile my X2 is running at 32*C idle. See the bottom two graphs on this page for evidence of throttling. You can see a P-D 920 @ 2.8GHz beating the overclocked 805 @ 3.8GHz in these graphs.

My X2 3800+ is at exactly 4600+ speeds (stock volts and cooling). Compared directly to the volt-modded P-D @ 3.8GHz in the benchmarks:

X2 4600+: 17 wins
P-D @ 3.8GHz: 14 wins.

The X2 is simply the superior chip.
 
Discussion starter · #19 ·
Regardless I Still cant justify an extra $165, I already have a water cooling system ready to go. the oc'ed 805 beat everything in almost every test and in tests where it wasnt the highest it was still close enough. this is in gaming and video encoding I have seen benchmarks for the x2 3800 and @2.9ghz and extreme water cooling was needed http://www.3dgameman.com/forums/showthread.php?t=41998

and that performance doesnt justify paying more than double.
 
#20 · (Edited)
An Opteron 165 can reach 3.0GHz+ on water for almost the same price as the X2 3800+. AMD simply dominates most gaming benchmarks, and Tom's only benched a few games, one of which (FEAR) was totally GPU-bound so gave a meaningless result.



Yeah, like a P-D 920 @ 2.8GHz is better than a P-D 930 @ 3.0GHz.
Image


The P-D 805 is the old 90nm Smithfield core with half the cache of a Presler, and can't overclock anywhere near the levels of a 65nm Presler with 2MB L2 cache. P-D 920s can reach 4.8GHz on water. A much better prospect and not much more money.

The 805 chip must be overclocked to 4.0GHz on water for it to even compete with my chip.
 
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