[MSI R5870 Lightning UnOverclockable through Afterburner??]

Most of the cards, I hear, don't do that great on air cooling.

 

Have you tried adding some specers between the back of the PCB and the screws holding the heatsink?

 

 

 

What are the symptoms of the 'bad overclock'?

 

Needs 1.3v to run 1000 core on air, which is much worse than my asus (1.21v) but ok, its air right?

 

So on ln2 it will run 1200 with 1.3v, seems to like -120c, ok looking better, but there is a hard wall @ 1300. Takes 1.5v to run 1300 core, and that is hit and miss. More voltage does not help all the way to 1.6v. Past 1300 is impossible.

 

Now I know 1300 is a good core speed, but not for these cards, and not on ln2. my reference card would do 1320 on dice.

 

(PS I know the voltage control works because I had a DMM on the vgpu read point while testing and it actually overvolts a bit and very stable)

[MSI R5870 Lightning UnOverclockable through Afterburner??]

I might give the bios a try before I send it back, but I already have voltage control it just clocks like crap (for what it is marketed to be at least), even on ln2.

 

Mucho thanks for posting this for us though Massman

[romdominance - Xeon W3570 @ 5443MHz - 4sec 390ms wPrime 1024m]

Wow Rom, incredible, great work here!!!

[Dentlord - Core i7 920 @ 5153MHz - 4sec 609ms wPrime 32m]

Thanks supa!

 

Cant wait to see the action bring it on step

 

Theesa cheep she lova da dice!

[Dentlord - GeForce GTX 280 @ 950/1275MHz - 17675 marks 3DMark Vantage - Performance]

I was 20 points shy of gold and no more dice, so I made one last run hoping I had enough in the pot to get through, and I did

[Dentlord - Radeon HD 5870 @ 1060/1350MHz - 39948 marks 3Dmark 2005]

Thanks, I tried sooo hard to hit 40k and never got there lol