The Official OC (OverClocking) Thread!

You need some serious mhz to pull that off. It needs a 3.9Ghz Yorkfield to get 22,000 points, and that's when you overclock the GPU too. Mhz for Mhz the Phenom IIs are behind so you'd have to see beyond 4Ghz to pull that off.
Has the Phenom II price drop appeared in the US yet? Only one UK store seems to have done it so far.

Also, HD4830CF doesn't come close to an HD4870X2 at high res. Did you mean lower resolutions?

 

Im in the uk, the Phenom II's are hitting 22,000 lol with 4870 x2's

No higher resolutions I will find the link I was shocked tbh.

http://www.hexus.net/content/item.php?item=16300&page=9

http://www.tomshardware.com/reviews/4830-radeon-crossfire,2098-11.html

 

Bear in mind two HD4830s are still very powerful, a lot of tests don't really employ ideal hardware to test with either - you will only see the HD4830CF and HD4870X2 together if the CPU is the limiting factor. Overall, the HD4870X2 is around 50% more powerful than two HD4830s. Granted, it costs twice as much, but doesn't block off all your slots
Also note, 1920x1200 is not a high enough resolution to test the HD4870X2 - 2560x1600 is the only screen size you really need one for, else an HD4850X2 will do. GRiD just isn't demanding enough, and tom's hardware are pretty useless for benchmarks these days anyway.

 

http://www.amdzone.com/index.php/reviews/video-cards

everything bar company of hero's it performs well at 2560x1600 ) they overclock much better than the 4850's too, i think thats why we wont be seeing any 4830x2's cos they wouldn`t sell any 4850 x2's lol

 

The 4850X2s use different memory to the HD4850s, in the same way the HD4870X2s use different memory to the HD4870s, they're double size chips, hence why they don't overclock as well as the solo cards. It was the same initially with 1GB vs 2GB memory modules.
That test is fairly meaningless as they used a very slow processor (Note, I mean in scale of performance) Crysis is clearly CPU bound, as is UT3.

 

there's a phenom2 with only 2 3870's in crossfire thats 3.99 ghz

all I can say is bring on the AM3 phenom II with 2 4870x2's lol

it is starting to look like AMD are back in the game, will find a phenom II with 4870x2 when it comes up, seen one with 22,800 last night

 

3870s actually score better in 3dmark than 4830s I think.

Also consider if you use two 4870X2s, it still just shows up as '4870X2'.

 

Nah i get 1000 points less if i stick my 3870 in (

would have thought the 3870's 76GB/s memory bandwith v's the 60GB/s bandwith of my 4830 would have helped it more, but if i ran the benchmark with the 8.12 drivers for my 4830 it improves quite a bit again. i think it was about 400 points more again in the favour of the 4830.

Will do some benchies at the weekend with both in comparison with the 8.10 drivers and the 8.12 drivers, I believe it is the 8.12 catalyst which has the bug and not the drivers. I just use ati tool now. As when i Contacted support about the bsod they told me to use ati tool instead lol.

 

shows phenom 2 with 21,000 odd points

 

At an unknown speed. Knowing the Fins, it's probably on nitrogen...

 

the one i saw last night was 4ghz which is easy on water and many people recon possible on air, will dig around some more as 3dmark isn`t the most reliable place to see whats happening.

I know hey can do 3.8 easy on air and have seen benchies of 3.9 on air too. its nice to see some competition back, no doubt with newer bioses and finer tweaking Im sure 4ghz on air isnt out of the question with them.

Im going to do some research on motherboards so i am armed pending loan extension )

 

Basically, the Gigabyte MA790-DS4H seems to be by far the best board of the bunch.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128352

To get to 4Ghz seems to take around 1.50-1.55V, which for a 45nm is suicidal, but ignoring that, the heat output of the Phenom II is marginally higher than a Core 2 Quad, so you will need a tower heatsink with a high speed fan, and you will be getting temperatures hovering very close to the maximum at that speed, probably in the high 60s during a stress test.

 

lol if it gets worse I will go bankrupt ;o) plenty of places to put my recording equiptment / pc's ect ect ect. cant take what I dont have in my house ;o)

 

Sam,
The price just went down today. Was $275, now is $235! I've seen a number of 21-22,000 3DMark 06 scores at 3.8GHz with the HD4870x2 using the new Phenom II. Since 3.7 to 3.8GHz is pretty easy with the right MB, that speed range seems reasonable to me!

You are absolutely right about the MA790GX-DS4H being the best MB of the bunch, by a wide margin, Biostar has managed 4GHz on air with less than the maximum 1.50v of the Phenom II, but still doesn't perform as well as the DS4H, nor run as cool. I also see very wide differences in temps at those speeds. Folks that know what they are doing seem to have no problem on the DS4H running in the low 30C range at 3.8gHz. If you have decent case airflow, 3.8GHz is do-able with the stock Heat Pipe cooler without excessively high temps.

With the AM2+ 7750BE I'll be starting out with, 3.7 to 3.8GHz seems to be a snap, and you can overclock it to about 3.3 to 3.4GHz with just the multiplier, without touching the voltage at all. I'll be placing my order around the 30th, so I should have everything by the first week of February, and I'll let everyone know how it all goes. Here's my order, all made out!



$520 including tax and shipping. I'm Looking forward to it! I already have the 250GB Deskstar and the 80MM Silverstone fan. The 92mm one I'm ordering is for the HDD bay. I just want some forced intake air cooling over the HDD. I just this minute decided to use the fixed rpm 36.85 CFM Silverstone since it's cfm is more than good enough for the intake, so that drops the total price to $512. If I add a second burner, it takes the total price up to $542. My goal was under $550 delivered, so I'm right there, and can still get my Sceptre fixed! Sweet!

EDITED: To revise changes in my order.

Best Regards,
Russ

 

Out of interest, is the only difference between the DS4 and DS4H the HDMI, or does the DS4 have less overclocking ability?

 

Aside from the HDMI port, the DS4 lacks the better heatpipe chipset and VRM cooling and the SidePort memory for the OB video. From what I've seen, they both seem to overclock about the same. Since I'm not going to be using a video card, the DS4H is the best route for me to take!

Russ

 

Are you sure it overclocks as well with the onboard video enabled? Onboard graphics always used to be disastrous for overclocking in the past.

 

AMD Phenom II X4 Quad Core 940 BE 3.0GHz Socket AM2 - £161.99
Gigabyte GA-MA790X-DS4 AMD 790X - £ 71.99
Corsair TX 750W ATX2.2 - £ 82.99

- £ 47.55 Vat

- £364.52

have some geil black dragon 6400 which i will loosen the timings to get it to 1066.

not too bad an upgrade novatech seem to have the phenom II 940BE the cheapest in the uk from what i can find at the moment. even if i find it cheaper I can walk to novatech from here so saves £ on postage )

 

Incredible deal, yet you throw all that saved money away on a 750W PSU. Why?