Would a Zalman VF700-AlCu cool my HD4850 goodly OCed? - Overclock.net

EricM9104 · 11-09-08

Well?

I can't OC to 650MHz core and 1003MHz memory without it BSODing running 3dmark06.

**IEATFISH** · 11-09-08

What are your temps right now? If the temps aren't bad, a new cooler won't help things much, unless you plan to volt mod, then the better cooling will keep your temps down.

EricM9104 · 11-09-08

Idle temps now at stock speeds are 35C.

**IEATFISH** · 11-09-08

And load? Better cooling won't get you a better overclock unless your temps are what is holding you back. I would say that something else is probably holding you back since your idle temp with stock cooling is pretty low. Maybe your card, another overclock, not enough voltage, etc.

Minamoto · 11-09-08

The Zalman VF700-AlCu is too light for a HD4850. If I were you, I would look for a better solution such as an AC Accelero S1 or a Twin Turbo.

3XPeriment · 11-09-08

Quote:

Originally Posted by IEATFISH

And load? Better cooling won't get you a better overclock unless your temps are what is holding you back. I would say that something else is probably holding you back since your idle temp with stock cooling is pretty low. Maybe your card, another overclock, not enough voltage, etc.

I agree with IEATFISH. IMO though, the VF700 AlCu is a great cooler. Got my 9600GT to the speeds in my sig (20% OC core (650-781) 16% OC mem (900-1042)) Temps never get above 68C when folding or gaming.

EricM9104 · 11-09-08

Quote:

Originally Posted by IEATFISH

And load? Better cooling won't get you a better overclock unless your temps are what is holding you back. I would say that something else is probably holding you back since your idle temp with stock cooling is pretty low. Maybe your card, another overclock, not enough voltage, etc.

2% load.
It's a VisionTek, if that matters.

I use ATi Overdrive's Auto Tune feature, never artifacted in games from what I'd notice, but 3dmark06 will only do a full crash-free run with stock speeds.
Possbly dodgy 64-bit drivers?

**IEATFISH** · 11-09-08

Quote:

Originally Posted by EricM9104

2% load.
It's a VisionTek, if that matters.

I use ATi Overdrive's Auto Tune feature, never artifacted in games from what I'd notice, but 3dmark06 will only do a full crash-free run with stock speeds.
Possbly dodgy 64-bit drivers?

When I mentioned load, I meant What are your temps when it is under full load. Idle temps aren't too important.

I have the Visiontek and I use the 8.10 drivers with a DuOrb. I haven't had any problems with the driver. Before the DuOrb, I had no problems and could overclock it around 650, 1100 with temps in the 50s idle, 70s load. Now I have it overclocked about the same (never noticed much of a difference) with temps around 30 idle and 45-50 load.

In all seriousness, I never noticed a substantial increase in overclocking my 4850. It has been a great card, but I don't think better cooling will help you get a better overclock. If you do the Auto-tune, try to back it off 20-30 since it seems to do it a bit much and test for artifacts with ATITool or something.

EricM9104 · 11-09-08

Ah, ok thanks
How would I check for full load temps? Run the game in a window?

Do you have problems with running dual monitors on yours or does Windows crash?

**IEATFISH** · 11-09-08

Dual monitors work fine for me. Have you completely uninstalled and reinstalled the drivers?

You can use HWMonitor and run a game or ATITool Artifact check to put the card under some stress. You can do it full screen since the program records highs and lows so when you exit you can see how hot it got.

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Would a Zalman VF700-AlCu cool my HD4850 goodly OCed?

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