I have Radeon 4870 512mb 256bit
windows 7
Athlon II x2 235e
8 gigs mem

I would like my Radeon HD 4870 to eat some MWs
Help me feed my 4870 if possible

Replaced HD6450 with HD4870 for the Double precision
don't know if that effects anything.

Downloaded driver
13.9 - running right now and does not work MW WUs.
driver package ver = 8.97.100.11-130429a-158498C-ATI
Bought 4870 online with no base drivers supplied.




Also posted in windows Q&A forum, then seen post to post here for quicker response.
So posted it is.

Short answer, you need Cat 13.1

And yea the 4870s DP power is still pretty decent compared to much more modern low, mid & hi-mid range cards :).

You'll need to do a 'deep clean' of your current drivers before installing 13.1, see this thread http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=3400

---

Team AnandTech - SETI@H, DPAD, F@H, MW@H, A@H, LHC, POGS, R@H, Einstein@H, DHEP, WCG

Main rig - Ryzen 5 3600, MSI B450 G.Pro C. AC, RTX 3060Ti 8GB, 32GB DDR4 3200, Win 10 64bit
2nd rig - i7 4930k @4.1 GHz, HD 7870 XT 3GB(DS), 16GB DDR3 1866, Win7

***** Now running on Radeon hd 4870 opencl boinc *****

Here is how it happened

CAT 13.9 legacy installed

First checked graphics card with gpu-z

When first started

gpu-z gave the following warning

quote
ATI OpenCL driver bug detected, skipping OpenCL detection.
Uninstall the AMD STREam SDK.................
end quote

I removed AMD app sdk
through CAT program in add remove programs


then installed AMD app sdk 2.7
name - AMD-APP-SDK-v2.7-Windows-641

Same problem in gpu-z and boinc


put the above "quote" into search engine

lead me to this website



http://mrlithium.blogspot.com/2013/03/opencl-hassles-ati-opencl-driver-bug.html

It had the following fix

Quoting from Mrlithium's blog

THE FIX:
1. Uninstall any AMD Stream SDK you have right now.
2. Delete amdocl.dll and opencl.dll from C:\windows\system32 and C:\windows\Syswow64.
3. Reinstall the AMD Stream SDK you have. Does not matter which one (I think)
4. Check to make sure the amdocl.dll and opencl.dll files you just deleted have not come back.
5. Check in C:\Program Files (x86)\AMD APP\bin\x86 and C:\Program Files (x86)\AMD APP\bin\x86_64 to make sure the files are there in that location instead. This is where they should be.
6. Try using GPU-z to see if there is a tickmark next to OpenCL. If there is, all should be well, and you can continue to use Reaper/CGminer/GUIMiner to mine bitcoins/litecoins/etc. Or any OpenCL program for that matter.
7. For some reason I had to delete the kernel files that reaper/cgminer had generated such as litecoin-reaperv13.Cayman-256-5760-2.bin but I am not sure that this was due to OpenCL because I tried unlocking my Radeon 6950 GPU to a 6970 (and succeeded, link here) So it may have just been that the number of shaders or something was wrong.

End quote from Mrlithium's blog




**** I only did step 2 alone. ******

Have not restarted computer yet.
Shut down boinc
Restarted boinc it then showed opencl 1.0 support for 4870 in the start up log.
It seems I now also have opencl cpu support version 2.0 sse2 now, I don't recall seeing that before
I think that happened from the developer amd app sdk 2.7 install



Able to run opencl in MW
Able to run opencl in Seti Astropulse opencl 1.00
Able to run opencl primegrid opencl
that is so far.......
None of which could be ran before

Running CAT 13.9
with developer SDK 2.7
gpu-z running with opencl checked.

Thanks has to go to Mr.Lithium's blog and the efforts of trying to make some coin.


Why those drivers stopped things, and how they got there I don't know (maybe from previous graphics card,
from igp before that, from previous driver installs, from original win7, don't know). I now know that step 2 alone has worked for my scenario.

Everything so far seems to be running normal, will inform
if things change.

Venz out

Interesting, so with that hack it should be possible to run Cat 13.9 & MW v1.02 WUs, thanks for the info :). I'll link the MW v1.02 WU error thread to here.

Btw where did GPU-Z warn you about the bug?

---

Team AnandTech - SETI@H, DPAD, F@H, MW@H, A@H, LHC, POGS, R@H, Einstein@H, DHEP, WCG

Main rig - Ryzen 5 3600, MSI B450 G.Pro C. AC, RTX 3060Ti 8GB, 32GB DDR4 3200, Win 10 64bit
2nd rig - i7 4930k @4.1 GHz, HD 7870 XT 3GB(DS), 16GB DDR3 1866, Win7

Btw where did GPU-Z warn you about the bug?

It is the first screen to show, before the standard main screen.



Also - Restarted system no problem.
Finished PG Sieve no problem, (pending)
System running normal


It's busy eating galaxy chunks right now. (MW)
They must not be very filling, it sure is eating alot of them
4870 is saying mmmmmmm....., :)

Lol, & thx update.

---

Team AnandTech - SETI@H, DPAD, F@H, MW@H, A@H, LHC, POGS, R@H, Einstein@H, DHEP, WCG

Main rig - Ryzen 5 3600, MSI B450 G.Pro C. AC, RTX 3060Ti 8GB, 32GB DDR4 3200, Win 10 64bit
2nd rig - i7 4930k @4.1 GHz, HD 7870 XT 3GB(DS), 16GB DDR3 1866, Win7