*** Official 5850 Benchmark/Performance Thread ***

[gareth170]

Well go up in steps first, go as high as you want with your OC and then work your volts up until you get stability, of course your max OC may not stick no matter the volts so play around a bit and find you max.

What is the max OC that the software lets you go up to?

1090mhz on the core / 1300mhz memory

 

[RavenXXX2]

You would be a very lucky man to hit them speeds but you never know, even 1000 GPU would be great.

 

[gareth170]

ill play around with it in 30min, see how high i can get it.

 

[straxusii]

For reference I get GPU score of 16200 in vantage performance setting clocked at 900/1230

 

[Greebo]

You would be a very lucky man to hit them speeds but you never know, even 1000 GPU would be great.

You'd be surprised. Most 5850 overvolted seem to reach past 1000Mhz.

 

[gareth170]

which driver is better for these 5800 series cards. RC6 or RC7?

 

[RavenXXX2]

I'm using the ones on ATI's site, 100% stable here.

 

[andyrp2001]

What settings do you use in Catalyst for the benchmark? I had everything maxed out for a quick game of BF2 and then ran 3dMark Vantage with everything still maxed out.

 

[Jabbs]

i can't seem to get the hang of this Afterburner thing all i can seem to get is 773 core and 1123 memory, whenever i go above it just goes back to that no matter what i do with the voltage.

 

[milkamil]

Intel Core2 Duo E8400 @ 4,05GHz 1.216V cooled by Karakorum
Asus P5Q Pro bios v1613
A-Data Vitesta EE DDR2 800+ 2x2GB @ 1080MHz 5-5-5-15 PL8 2.0V; cooled by OCZ XTC Cooler Rev 2
Sapphire HD5850 1024MB GDDR5
Seagate 320GB Barracuda 7200.10; Samsung 500GB Spinpoint F3 HD502HJ Pioneer DVR-216
Tagan U33 2-Force II Series 600W; Chieftec LBX-01B-B-B
Creative Sound Blaster X-Fi; Creative GigaWorks G500 ProGamer 5.1
Speed-Link Medusa ProGamer 5.1; Logitech MX510; SteelPad QcK +; Logitech G25
LG W2252TG-PF


Vantage settings default, 1280x1024. HD5850 stock:

Crysis 1.2

1680x1050 Very High AAx0 AFx0:

1680x1050 Very High AAx0 AFx16:

1680x1050 Very High AAx4 AFx0:

1680x1050 Very High AAx4 AFx16:

OC 775/1125 (max in CCC, 725/1000 default) 1680x1050 Very High AAx4 AFx16:

S.T.A.L.K.E.R. Clear Sky 1680x1050 Ultra DX10.1 AAx0 AFx16 775/1125:

 

[wolvers]

Be aware that it's possible to overclock the memory on these cards too far. You'll see a drop in performance past a certain point.

As mentioned in the HD 5870 article, overclocking the memory on these cards is quite different from any other card so far. Normally you'd expect rendering errors or crashes, but not with these cards. Thanks to the new error correction algorithm in the memory controller, every memory error is just retransmitted until everything is fine. So once you exceed the "stable" clock frequency, memory errors will appear more often, get retransmitted, but the rendered output will still look perfectly fine. The only difference is that performance drops, the further you increase the clocks, the lower the performance gets. As a result a normal "artifact scanning" approach to memory overclocking on the HD 5800 Series will not work. You have to manually increase the clocks and observe the framerate until you find the point where performance drops.

http://www.techpowerup.com/reviews/HIS/HD_5850/32.html

 

[gareth170]

i can't seem to get the hang of this Afterburner thing all i can seem to get is 773 core and 1123 memory, whenever i go above it just goes back to that no matter what i do with the voltage.

AMD GPU Clock Tool works but can't up the voltage.

maybe these cards have locked voltages??

 

[RavenXXX2]

So they have put an upper OC limit of 773 on the 5850, guess you guys are going to have to modify a bios or flash using a 5850 bios with higher OC limits, like the pre OC Asus cards.

 

[straxusii]

AMD gpu tool will probably get over the limit (it does for 5870) but it's only useful for benchmarking as it nobbles powerplay (idle clocks).

 

[wolvers]

AMD GPU Clock Tool works but can't up the voltage.

maybe these cards have locked voltages??

But the voltage tweak definitely worked on the MSI afterburner?

 

[gurusan]

Really quite tempted by these cards! Was looking at the 5770 but I need a cooler that exhausts out the back of the case.

Anyone think these will drop in price by a few quid in the next week or so?

 

[wolvers]

No way, not yet. There still isn't enough around for pre-orders.

 

[gurusan]

bah, guess I'll just buy one anyway.

 

[wolvers]

Yeah man, do it!!

 

[gareth170]

But the voltage tweak definitely worked on the MSI afterburner?

i did get it to work once on the voltage tweak but couldn't up the clocks past the limit.

AMD GPU Clock Tool can up the clocks past the limit but not the voltage.